HELICOPTER, ATTACK, AH-64D LONGBOW APACHE. TECHNICAL MANUAL (2002)

TM 1-1520-251-10

Table 2-15. Advisory Messages - continued

UFD TEXT

PARAMETER OR FAULT

MPD PAGE TEXT

ADVISORY

EUFD TEXT

TONE

[

BLK 2

NET JOIN

A mismatch has been detected and a NET

NET JOIN REQUIRED

REQUIRED]

JOIN is required.

[

BLK 2

IDM INHIBIT]

The IDM has been placed in the INHIBIT

IDM INHIBIT

mode.

[

BLK 2

IDM FAULT]

The IDM has lost communication over the

IDM FAULT

RS232 CSMA port with one or both of the

FM radios.

[

BLK 2

SEEKING TI]

A radio is tuned to the Internet protocol and

SEEKING TI

is attempting to find the TI server.

[

BLK 2

*FREE TEXT]

The IDM has received a flash free message.

*FREE TEXT

YES

[

BLK 2

*FCR TGT

The IDM has received a flash FCR Target(s)

*FCR TGT REPORT

YES

REPORT]

report.

[

BLK 2

*BDA REPORT]

The IDM has received a flash BDA report.

*BDA REPORT

YES

[

BLK 2

*PP REPORT]

The IDM has received a flash manually sent

*PP REPORT

YES

Present Position report.

[

BLK 2

*OBSERVER

The IDM has received a flash oberver

*OBSERVER MSN

YES

MSN UPDT]

mission update.

UPDT

[

BLK 2

*MSG TO

The IDM has received a flash message to

*MSG TO OBSERVER

YES

OBSERVER]

oberver message.

[

BLK 2

*AIRBORNE FIRE

The IDM has received a flash airborne fire

*AIRBORNE FIRE MSN

YES

MSN]

mission message.

[

BLK 2

*SPOT REPORT]

The IDM has received a flash spot report.

*SPOT REPORT

YES

[

BLK 2

*SITREP]

The IDM has received a flash situation

*SITREP

YES

report.

[

BLK 2

*FIELD

The IDM has received flash field orders.

*FIELD ORDERS

YES

ORDERS]

[

BLK 2

*INFO

The IDM has received a flash information

*INFO REQUEST

YES

REQUEST]

request.

[

BLK 2

CPG UFD HOT]

The CPG’s Up - front Display has detected

CPG UFD HOT

an overtemperature condition.

[

BLK 2

PLT UFD HOT]

The Pilot’s Up - front Display has detected an

PLT UFD HOT

overtemperature condition.

[

BLK 2

CTR TANK

The Internal Auxiliary Fuel System is empty.

CTR TANK EMPTY

EMPTY]

The calculated IAFS fuel level is low and

when the IAFS was commanded to transfer,

the fuel lines did not pressurize.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 4

2-161

TM 1-1520-251-10

Table 2-15. Advisory Messages - continued

UFD TEXT

PARAMETER OR FAULT

MPD PAGE TEXT

ADVISORY

EUFD TEXT

TONE

[

BLK 2

CTR XFER FAIL]

The Internal Auxiliary Fuel System failed to

CTR XFER FAIL

transfer fuel. The calculated IAFS fuel level

is not low and when the IAFS was

commanded to transfer, the fuel lines did not

pressurize.

[

BLK 2

DTC WRITING]

The DTU door has been opened, but the

DTC WRITING

DTU is finishing writing the FAT on the DTC.

The DTC cards should not be removed.

[

BLK 2

DTC WRITE

The DTU door has been opened, and the

DTC WRITE

COMPLETE]

DTU has finished writing the FAT on the

COMPLETE

DTC. The advisory indicated the DTC cards

ready to be removed.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

2-162

Change 2

TM 1-1520-251-10

2.140 TESS ADVISORY MESSAGES

mesages. A listing of Advisories, cause for the Advisory,

Advisory Tone, and Voice Message is presented in Table

TESS advisory messages are presented to crewmembers

2-16.

via the UFD/EUFD and MPD Page formats and as voice

Table 2-16. TESS Advisory Messages

UFD TEXT

PARAMETER OR FAULT

MPD PAGE TEXT

ADVISORY

VOICE

EUFD TEXT

TONE

MESSAGE

[

BLK 1

TESS NO GPS]

TESS has not been able to track

TESS NO GPS TRACK

[

BLK 2

TESS NO GPS

the GPS satellites.

TRACK]

[

BLK 1

SIM KILL]

TESS has detected a simulated

TESS SIM KILL

You have

[

BLK 2

TESS SIM

kill condition.

been killed.

KILL]

[

BLK 1

SIM HIT]

TESS has detected a simulated

TESS SIM HIT

You have

[

BLK 2

TESS SIM HIT]

hit condition. Remains on for 8

been hit.

seconds.

[

BLK 1

SIM MISS]

TESS has detected a simulated

TESS SIM NEAR MISS

Near miss.

[

BLK 2

TESS SIM

near miss condition. Remains on

NEAR MISS]

for 8 seconds.

[

BLK 1

SIM RESET]

TESS has established the

TESS SIM RESET

Simulation

[

BLK 2

TESS SIM

aircraft in a reset state after a

is reset.

RESET]

simulated hit or kill condition (i.e.

the aircraft is in the same state it

began the excercise in).

Remains on for 8 seconds.

[

BLK 1

SIM RESURR]

TESS has established the

TESS SIM

Simulation

[

BLK 2

TESS SIM RES-

aircraft in a resurrected state

RESSURRECT

SURRECT]

after a simulated hit or kill

resurrected.

condition (i.e. the aircraft is in

the same state before being hit

or killed). Remains on for 8

seconds.

[

BLK 1

LIVE ROUND]

TESS has determined live gun

TESS LIVE GUN AMMO

[

BLK 2

TESS LIVE

ammo is present on the aircraft.

GUN AMMO]

[

BLK 1

LIVE ATAM]

TESS has determined a live ATA

TESS LIVE ATA MSL

[

BLK 2

TESS LIVE ATA

missile is present on the aircraft.

MSL]

[

BLK 1

LIVE HF MSL]

TESS has determined a live

TESS LIVE HF MSL

[

BLK 2

TESS LIVE HF

hellfire missile is present on the

MSL]

aircraft.

[

BLK 1

LIVE ROCKET]

TESS has determined a live

TESS LIVE ROCKET

[

BLK 2

TESS LIVE

rocket is present on the aircraft.

ROCKET]

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 2

2-163

TM 1-1520-251-10

CHAPTER 3

BLK 1

AVIONICS

Section I.

GENERAL

3.1 DESCRIPTION

• The UHF-AM (ARC-164) radio provides

the second best overall performance. Two

Avionics equipment includes communication equipment

line-of-sight blockages occur with the UHF

and navigation equipment. This chapter describes each

radio that completely block reception and

major item with respective locations on the airframe and

transmission due to pylon-mounted weap-

antenna locations.

ons. These blockages are in 25-degree di-

3.2 AVIONICS EQUIPMENT CONFIGURATION

rectional arcs, from 012 to 037 degrees and

Communication/Navigation equipment configurations are

from 323 to 348 degrees from the nose. A

shown in Table 3-1. Communication/Navigation antenna

slight range and audibility degradation oc-

locations are shown in Figure 3-1.

curs around the tail directions from 120 to

240 degrees from the nose. Although trans-

3.3 AVIONICS POWER SUPPLY

missions are clear, the maximum reception

range for UHF is approximately 30 NM be-

CAUTION

low 300 MHz and approximately 35 NM

Uncommanded FM transmissions may occur

above 300 MHz.

during IDM IBIT, FALLBACK, when the CIU

• The FM-1 radio transmits clearly and pro-

circuit breaker is open, or during CIU power-

vides the third best overall performance. A

up. CIU power-up occurs during aircraft pow-

slight range and audibility degradation oc-

er-up and upon CIU circuit breaker reset.

curs at the low and high band of frequen-

Power to operate all of the avionics communication equip-

cies in directions from 120 to 210 degrees

ment is provided by the emergency dc bus. This allows back-

from the nose. Reception is achieved up to

up battery power to be used in case of an aircraft electrical

a maximum range of 29 NM for plain and

failure. External power may also be applied. See Chapter 2,

22 NM for cipher text mode. The exception

Section XI for more information on electrical power supply.

is near 40 and 80 MHz where reception is

achieved to a maximum range of 23 and

NOTE

16.5 NM respectively. Non-line-of-sight re-

• Testing of the aircraft has shown that there

ception is expected to be nonexistent.

may be significant self-generated interfer-

• The FM - 2 radio can transmit clearly at

ence (HF missile launchers, DNS anten-

slightly reduced ranges. A severe reception

nae, MPDs, etc.) and local conditions (ra-

range and audibility degradation occurs on

dio, television stations, public transmitters)

most frequencies compared to the FM-1.

that affect aircraft communications receiv-

The maximum line-of-sight reception

ers. Reception ranges may be significantly

range is 22 NM, except for frequencies of

reduced, whereas, transmission capability

32, 40 and 80 MHz that can be as low as

is normally unaffected.

13 NM.

• The VHF-AM (ARC-186) radio can

transmit clearly. A slight range and audi-

bility degradation occurs at the high band

frequencies in directions from 0 to 120

degrees from the nose. Reception is

achieved up to a range of 22 NM except

with frequencies above 145 MHz where

the direction degradation is severe.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 3

3-1

TM 1-1520-251-10

Table

3-1. Communication/Navigation Equipment

Control

Equipment

Nomenclature

Use

Range

Location

Remarks

Inter -

Communication

Pilot right

Pilot volume controls RH

Inter-

Within crew

communication

Control Panel

console and

wing volume, CPG

communication

stations

(COMM)

CPG right

volume controls LH wing

between crew

and two

console

volume,

members, wing

external

station

receptacles

communications

located on

and volume control.

the wing

tips.

Radio set

Two-way voice

Line of

MPD, UFD,

VHF-AM

RT-1300B/

communications

sight

and COMM

Communication

ARC-186(V)

VHF-AM frequency

panel

VHF

range 116 to

151.975 MHz.

Receives only

frequency range

108 to 115.975

MHz.

UHF-AM

Radio set

Two-way voice

Line of

MPD, UFD,

Provides the capability to

Communication

RT-1145F/

communication

sight

and COMM

monitor the guard

ARC-164(V)

UHF-AM frequency

panel

frequency while receiving

UHF (HAVE

range of 225 to

and transmitting on any

QUICK)

399.975 MHz.

frequency other than 243

Radio set

Contains a

MHz. Provides the

RT-1614 (HQ2)

separate dedicated

capability for frequency

guard receiver

hopping (FH) and secure

fixed-tuned to 243

communications.

MHz.

VHF-FM

Radio set

Two-way voice

Line of

MPD, UFD,

Provides the capability for

Communication

RT-1478D/

communication

sight

and COMM

FH and secure

ARC-201D VHF

VHF-FM in the

panel

communications.

Single Channel

frequency range of

Ground and

30 to 87.975 MHz.

Airborne Radio

Set

(SINCGARS)

Radio set

Two-way voice

Non - Line

MPD, EUFD,

Provides the capability for

Communication

ARC-220 HF

communication HF

of sight

and COMM

non - line of sight

in the frequency

panel

communications.

range of

20 to 29.9999 MHz.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-2

Change 3

TM 1-1520-251-10

Table 3-1.

Communication/Navigation Equipment - continued

Control

Equipment

Nomenclature

Use

Range

Location

Remarks

Voice Security

TSEC/KY-58

Secures

Not

MPD, UFD,

The COMSEC subsystem

System

(CIPHER

communication for

applicable

and

provides control of the

DEVICE)

UHF radio.

EMERGENCY

TSEC/KY-58 from both

panel.

crew stations. It has the

capability to store up to 6

Crypto Net Variables.

FM amplifier

Improved FM

Varies power

Not

MPD

Is a variable power

(IFM)

output of FM1.

applicable

amplifier capable of

providing RF output at

four power levels.

Transponder set

RT-1836/

Transmits a reply

Line of

MPD, EUFD,

Includes mode S growth

APX-118(V)

coded to a radar

sight

and

provisions and embedded

interrogator

EMERGENCY

encrypted Mode 4

system.

panel.

operation.

Transponder set

RT-1471/

Transmits a reply

Line of

MPD, EUFD,

Optional installation to

APX-100(V)

coded to a radar

sight

and

RT1836/APX - 118

interrogator

EMERGENCY

system.

panel.

Identification

Kit-1C computer

Provides encrypted

Not

Not applicable

Not reguired for

Friend or Foe

mode 4 operation.

applicable

RT1836/APX - 118

(IFF)

Communication

CIU

Provides

Not

Not applicable

Provides audio switching,

Interface Unit

P/N

centralized

applicable

conditioning, and mixing

7-513200010

processing and

capabilities; crew monitor

distribution of

and transmitter

communication

selections; and voice

data and audio

messages and warning

signals.

tones.

Improved Data

Provides an

Not

MPD

IDM, MD-1295/A

Provides capability to

Modem

interface between

applicable

transmit and receive data

tactical aircraft

via Longbow Protocol.

radios and data

bus.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 3

3-3

TM 1-1520-251-10

Table 3-1.

Communication/Navigation Equipment - continued

Control

Equipment

Nomenclature

Use

Range

Location

Remarks

Embedded

GPS

Provides position

Not

MPD

Global

and velocity

applicable

Positioning

information to the

Inertial

INU

Navigation

System (EGI)

INU

Provides

Not

MPD

acceleration,

applicable

angular rate,

heading, velocity,

position, and

position error

estimates data.

Provides actual

0 - 1428 ft

MPD/IHADSS

Radar Altimeter

Altimeter, Radar

terrain clearance

AN/APN-209

height.

Doppler Radar

AN/ASN-157

Provides aircraft

Not

MPD

Velocity Sensor

referenced ground

applicable

(DRVS)

velocities to the

EGI.

ADS

Not

Not applicable

Air Data System

Computes air mass

applicable

referenced data to

provide the

Omni-directional

airspeed,

Barometric Altitude,

and Outside Air

Temperature

information

necessary to

display Mean Sea

Level (MSL) terrain

elevation for the

aircraft present

position.

Automatic

AN/ARN-149

Provides a relative

Line of

MPD

Direction Finder

bearing to the

sight

(ADF)

station signal as

well as an audio

output of the

received signal.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-4

Change 3

TM 1-1520-251-10

Section II. COMMUNICATIONS SUBSYSTEM

3.4 INTRODUCTION

• ARC-186(V) VHF-AM Radio Set

NOTE

This section covers the description and operation of air-

craft communication subsystem and the Transponder/IFF

The APX-100(V) Transponder or

subsystem (fig 3-2 ). Both voice and digital communica-

APX-118(V) may be installed. If

tions are supported by the following equipment:

APX - 100(V) is installed, Kit - 1C computer

must be installed for Mode 4 operation.

• ARC-186(V) VHF-AM Radio Set

• ARC-164(V) UHF-AM Radio Set (HAVEQUICK)

Each crewstation provides the crew with independent control

and status monitoring of the communication subsystem via

• Load Maintenance Panel (LMP) (COMSEC)

the Multipurpose Display (MPD), Up Front Display (UFD),

• ARC-201D VHF-FM (SINCGARS) 2 each

and Keyboard Unit (KU). In addition, monitor select and vol-

• TSEC/KY-58 (CIPHER DEVICE)

ume/squelch controls for each of the four radios are con-

trolled by the COMM panel in each crewstation. The commu-

• IFM-101A/AM-7189A/ARC Improved FM (IFM)

nication subsystem equipment is powered from the battery

Amplifier

bus and defaulted to ON when power is applied. However

crew control of the radios is limited until aircraft or external

• APX-100(V) Transponder

power is applied. After aircraft power has been applied to the

MPDs, rapid initialization of the radio presets and Signal Op-

• APX-118(V) Transponder

erating Instructions (SOI) can be accomplished via the Data

• MD-1295/A Improved Data Modem (IDM)

Transfer Unit (DTU).

AM1789A/ARC

ARC−186

IMPROVED FM

VHF−AM RADIO

AMPLIFIER

ARC−201D (FM2)

VHF−FM RADIO

SYSTEM

PROCESSOR q2

HF POWER AMPLIFIER

COUPLER

ARC−201D (FM1)

DATA TRANSFER

UNIT

VHF−FM RADIO

ARC220 HF RADIO

DISPLAY

ARC−164

PROCESSOR q2

UHF−AM RADIO

COMMUNICATION

INTERFACE

UNIT (CIU)

KY−58/TSEC

PROCESSOR

SECURE VOICE

KY−100/TSEC

PROCESSOR

SECURE VOICE / DATA

KIT−1C/TSEC

MD1295/A

IMPROVED DATA

TRANSPONDER

MODEM (IDM)

COMPUTER (WITH APX100)

SYSTEM

DISPLAY

APX−100(V) OR APX118(V)

PROCESSOR q1

IFF TRANSPONDER

LBA5080A

Figure 3-2. Communications Subsystem

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-6

Change 3

TM 1-1520-251-10

3.5 ARC-186(V) VHF-AM RADIO SET

3.6.1

Frequency Hopping (FH) Capability (HAVE

QUICK). The UHF radio has a FH capability, which is an

electronic counter-countermeasures (ECCM) enhance-

The aircraft contains one ARC-186 VHF radio which pro-

ment to the standard UHF radio. The radio provides a FH

capability, by which the frequencies being used and the

vides two-way communication over VHF-AM frequency

dwell times are rapidly changed many times a second.

range (116.000 to 151.975 MHz) in 0.025 MHz channel

The radio requires three items to determine the FH pat-

spacing.

tern:

a. Time of Day (TOD). The TOD is synchronized to

NOTE

the radio clock, which is normally set to Coordinated Uni-

versal Time (UTC). The TOD is required by the radio to

ARC-186 FM frequencies (30.000 to

maintain its internal clock, which controls the FH timing.

87.975 MHz) are not implemented in the air-

The TOD is set upon power-up using the time from the

craft. FM frequencies are provided by the

EGI. The crew may send or receive the TOD signal if FH

ARC-201D radios.

communication is desired through non TOD synchronized

radios. Receiving the TOD affects only the internal clock

of the UHF radio.

3.5.1 VHF Tone. Selecting the VHF TONE button will

not generate a tone from the radio but will transmit a ”dead

b. Word of Day (WOD). The WOD is classified and

carrier” over the air for maintenance.

controlled by the National Security Agency (NSA). The

WOD programs the FH pattern and rate. The radio cannot

function in the FH mode without a valid WOD. A WOD is

3.6 ARC-164(V) UHF-AM RADIO SET (HAVE QUICK)

required for each day and consists of up to six segments,

which code the radio for FH. For HaveQuick 2 radios, the

WOD must be tagged with its operational day (1-31). The

The aircraft contains one ARC-164 UHF radio which pro-

WODs are loaded into the radio through the DTU or via

vides two-way communications over UHF-AM frequency

the crew.

range (225.000 to 399.975 MHz) in 0.025 MHz channel

spacing. The radio contains a separate dedicated guard

c. Net Number. The net number programs the radio

receiver fixed tuned to 243.000 MHz, thus providing capa-

to operate in one of the FH modes, selects the frequency

bility to simultaneously monitor guard frequency (243.000

table to be used and determines entry point into the FH

MHz) while receiving and transmitting on any frequency

pattern. Net numbers enable multiple station pairs to op-

other than 243.000 MHz. When the transceiver is tuned to

erate simultaneously using the same WOD and TOD with-

243.000 MHz, the dedicated guard receiver is automati-

out interference. The net number will be loaded into the

cally turned OFF. The radio set has squelch capability and

radio through the DTU or via the crew.

can operate in either single channel or frequency hopping

mode. The frequency hopping capability of the UHF radio

3.6.2 UHF Tone. Selecting the UHF TONE button gen-

is referred to as HAVE QUICK (HQ). There can be one of

erates an audio tone from the radio and transmits the tone

two versions of HAVE QUICK radios installed in the air-

over the air.

craft. HAVE QUICK 1 radios provide the capability to load

one word of day into the radio and utilize 6 training fre-

3.7 LOAD MAINTENANCE PANEL (LMP)

quencies for the training mode. HAVE QUICK 2 radios

provide the capability to load up to six words of the day

The LMP (fig 3-3 ) consists of a keypad, display, front pan-

into the radio and utilize 16 training frequencies for the

el control switches, and knobs. It is co-located in the RH

training mode.

aft avionics bay with the Remote Selectable Fill Port.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-7

TM 1-1520-251-10

6PD

6IL

6RC

6SK

6WP

LBA2583

Figure 3-3. Load Maintenance Panel

3.7.1 LMP Capabilities. The LMP provides the follow-

3.7.3 Press-To-Talk (PTT) Pushbutton. The PTT but-

ing capabilities:

ton enables the transfers of Crypto Net Variable(s) from

the Fill Gun to the KY-58. This CNV transfer can be initi-

• Display and specify VCR tape length loaded.

ated by keying the appropriate radio from either crewsta-

• Position pylons for loading stores.

tion.

• Override the SQUAT SWITCH setting to simulate

3.7.4 LMP Lighting. To save power, all LMP displays

airborne conditions for troubleshooting and testing

and lamps are extinguished while airborne. After landing,

while on the ground.

activation of any LMP keypad pushbutton reactivates the

• Display and specify rocket types associated with

LMP displays and status lights. The initial keypad push-

each of the aircraft rocket zones.

button activation is not interpreted as a data entry key-

stroke.

• Display and specify 30mm Gun rounds count.

• Display and specify Chaff count.

3.7.5 FM Radio Fill Selections. The LMP provides for

• Specify data download to the FM radios.

frequency hopping and COMSEC variable fill selections

via LMP keyboard. Selections are available for the follow-

• Press-to-talk (PTT) and Remote Override (RMT

ing fill gun capabilities:

ORIDE) COMSEC pushbuttons.

• Single Hopset Preset

3.7.2

Remote Override (RMT ORIDE) Pushbut-

• Single Lockout Set Preset

ton.

The RMT ORIDE button disables MPD control and

enables front panel (KY-58) control capabilities for Crypto

• Single COMSEC variable

Net Variables loading purposes. The RMT ORIDE button

is automatically disabled when the aircraft is airborne and

• Complete set of Hopset/Lockout Set/COMSEC

must be manually actuated on the ground for any further

Single Hopset/Lockout Set/COMSEC variable filling re-

quires two separate FILL gun devices. A complete set of

NOTE

Hopset/Lockout Set/COMSEC variable filling can be

ICS communication is the only recom-

achieved with a single FILL gun device. LMP display feed-

mended communication during PTT opera-

back is provided for function in-progress, function comple-

tions. Do not use UHF at this time.

tion, function PASS and function FAIL status.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-8

TM 1-1520-251-10

3.7.6 VCR Selection. Selecting VCR on the LMP top

automatically loaded when the system is filled through the

level menu produces a display which provides a selection

Remote Selectable Fill Port or through an ECCM Remote

for one of two possible VCR tape lengths. In addition, the

Fill (ERF).

currently selected VCR tape length is displayed. Tape

length is used by the VCR to calculate the elapsed time

3.9 TSEC/KY-58 VOICE SECURITY SYSTEM

which is displayed on the VCR page. Two possible tape

lengths are 40 minute and 60 minute tapes.

The aircraft contains one TSEC/KY-58 Voice Security

System for the UHF radio which provides encrypted com-

3.8 ARC-201D VHF-FM SINGLE CHANNEL GROUND

munication for the radio. The TSEC/KY-58 has the capa-

& AIRBORNE RADIO SET (SINCGARS)

bility to store up to six Crypto Net Variables (CNV). CNVs

are COMSEC variables required to establish the encryp-

tion process inside the TSEC/KY-58. CNVs are generally

The aircraft contains two ARC-201D VHF-FM radios

loaded directly into the TSEC/KY-58 via a fill gun by the

which provide two-way communications over VHF-FM fre-

maintenance crew at the Remote Selectable Fill Port, but

quency range of 30.000 to 87.975 MHz in 0.025 MHz

may also be loaded through RF Link. TSEC/KY-58 con-

channel spacing. The radio set operates in either single

trols are implemented on the MPD and/or the EMER-

channel or frequency hopping (FH) mode. The two

GENCY Panel and the LMP.

ARC-201D radios are referred to as FM1 and FM2, or in

general as FM. In addition, secure voice/data communica-

3.9.1

KY-58 Tones. The KY-58 generates tones for

tions are provided by COMSEC equipment which is em-

variable loading and failure conditions. An additional tone

bedded in the radios.

is generated when the KY-58 is ready to Tx or Rx.

3.8.1

Frequency Hopping (FH) Capability. This en-

3.10 IMPROVED FM (IFM)

hancement provides a FH capability (frequencies and

dwell times are rapidly changed many times a second).

FH provides an anti-jamming capability which can operate

CAUTION

in conjunction with a secure communications mode. Zer-

oizing the individual radio can be accomplished from the

• The IFM should be turned OFF when

MPD. Three items required to determine FH patterns are:

operating the radios on battery power

to avoid draining the aircraft battery.

a. Time. Time is in the form: day, hour, and minutes.

• Transmitting IFM in HIGH while both

Time is required by the radio to maintain its internal clock,

FMs are tuned to the same frequency

which controls FH timing.

may cause damage to the FM2 receiv-

er.

b. Hopset. The Hopset is classified and controlled

by the NSA. The Hopset programs frequency hopping

NOTE

rate and frequency hopping pattern. The range of Hopsets

is between 001 to 999. There are up to six Hopsets loaded

Failure of the IFM will turn off the sidetone

into the radio. Hopset information can be inserted locally

from the ARC-201D FM1 radio. An IFM fail-

through the fill gun with control provided by the load main-

ure is also reported during radio IBIT. The

tenance panel (LMP) and connected via the remote se-

FM1 radio may still be able to transmit at its

lectable FILL port. It can also be distributed by RF link

own internal power of 10 Watts. Should an

also known as ECCM Remote Fill (ERF).

IFM failure occur it is recommended to turn

IFM off.

c. Lockout Set. During frequency selection for the

Hopsets, it may be determined that interference may re-

The aircraft contains one IFM amplifier to vary the RF

sult between two nets using the same frequency. In this

power output of the FM1. The four power levels are listed

case one of two types of lockouts, common or unique, is

in Table 3-2.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-9

TM 1-1520-251-10

the KIT-1C computer via a fill gun through the Remote Se-

Table 3-2. RF Output Levels

lectable Fill Port in the aft avionics bay. Code selection is

Power Setting

Effective Radiating Power (Watts)

limited to A or B, which corresponds to the operational

LOW

2.5

day. Other MODE 4 capabilities are:

NORM

10.0

• When on the ground, the MODE 4 HOLD

HIGH

40.0

enables the computer to save the last

MODE 4 codes for utilization on the next

OFF

10.0

power-up.

The communications subsystem provides capability to set

• IDENT selection located on the MPD and

IFM Power to LOW /NORMAL /HIGH /OFF via the MPDs.

COMM panel enables IDENT transmis-

sion to ID ownship on others’ radar

screens.

3.11 APX-100 TRANSPONDER

• Selectable MODE 4 audio cueing.

The aircraft contains one transponder, an APX-100 or

APX - 118 (para 3.11A ) which provides automatic radar

• Selectable MODE 4 UFD visual cueing.

identification of the aircraft to all suitably equipped sta-

tions. The transponder receives, decodes, and responds

• Selectable EMERGENCY mode.

to interrogation of the following modes:

3.11A APX-118 TRANSPONDER

MODE 1

Provides 32 possible code

combinations that can be selected

The APX - 118 provides automatic radar identification of

in-flight. Possible code combinations

the aircraft to all suitably equipped stations. The trans-

are: 00-03, 10-13, 20-23, 30-33, 40-43,

ponder receives, decodes, and responds to interrogation

50-53, 60-63, and 70-73.

of the following modes:

MODE 2

Provides 4096 possible code

combinations. The desired code must

MODE 1

Provides 32 possible code

be set on the ground on the APX-100

combinations that can be selected

located behind access panel L160.

in-flight. Possible code combinations

Possible code combinations are

are: 00-03, 10-13, 20-23, 30-33, 40-43,

0000-7777.

50-53, 60-63, and 70-73.

MODE 3/A Provides 4096 possible code

MODE 2

Provides 4096 possible code

combinations that can be selected

combinations. Possible code

in-flight. Possible code combinations

combinations are 0000-7777.

are 0000-7777.

MODE 3/A

Provides 4096 possible code

MODE C Provides altitude information obtained

combinations that can be selected

from the FMC.

in-flight. Possible code combinations

are 0000-7777.

NOTE

MODE 4

Provides a crypto - secure mode of

identification by relying on an encrypted

• KIT - 1C is not required in the aircraft with

interrogation. It utilizes two classified

the APX - 118 transponder.

operational codes which are loaded

directly into the transponder via a fill

• When the KIT-1C is not installed in the

device through the Remote Selectable

aircraft, the MODE 4 selection will not be

Fill Port in the aft avionics bay. Code

shown on the MPDs.

selection is limited to A or B, which

corresponds to the operational day.

3.11.1 KIT-1C MODE 4 Computer. Provides a crypto-

MODE C

Provides altitude information obtained

secure mode of identification for the APX - 100 transpond-

from the FMC.

er, by relying on an encrypted interrogation. It utilizes two

MODE S

Growth provisions only.

classified operational codes which are loaded directly into

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-10

Change 3

TM 1-1520-251-10

3.12 IMPROVED DATA MODEM (IDM)

UFD communications symbology are:

NOTE

Radio identifier (VH, UH, F1, and F2).

Testing has shown that reception ranges are

Currently tuned frequency/FH parameters.

often degraded by five NM or more over

those ranges where voice communication

Squelch (OFF/ON) status (asterisk indicates

can be received.

squelch on).

The IDM provides an interface between aircraft radios and

CALL SIGN assigned to the currently tuned fre-

the mission equipment. IDM communications occur over a

quency.

crewmembers selected radio. Management of the IDM is

performed through the communications subsystem. Baud

Cipher (OFF/ON) status and Crypto Net Vari-

rate options of 16000, 8000, 2400, 1200, 600, 300, 150, or

able (UHF, FM 1, and FM 2 only).

75 are available.

Guard (G) receiver (OFF/ON) (UHF only).

3.13 UP FRONT DISPLAY (UFD) COMMUNICATION

CONTROLS

IDM Net Status.

UFD communication controls are the RTS pushbutton and

Last tuned frequency.

LAST pushbutton.

Current time (Local or Zulu).

3.13.1 RTS Push Button. When the RTS button is ac-

tioned the UFD cycles through the crewmembers selected

10.

FM1 power setting Low (L), Normal (N), High

radios, automatically bringing up the next radio as the ac-

(H), Off (O) Status.

tive transmitter.

11.

XPNDR Mode 4 code. Presence of code indi-

3.13.2 LAST Button. When the LAST button is ac-

cates Mode 4 is ON.

tioned the last frequency shown on the right side of the

UFD is exchanged with current frequency and call sign on

12.

Transponder Master Control (STBY/NORM/

the left side of the display. RTS radios in both crewstations

EMER) status.

are tuned to the last set frequency when the LAST button,

on the radio selected, is actioned.

13.

Transponder Mode 3/A status and code.

3.14 UFD COMMUNICATIONS FORMAT

14.

Transponder identifier.

The UFD is capable of displaying a select subset of the

15.

Total fuel quantity.

current status of the communication system as shown in

figure 3-4.

16.

Transmit/receive indicator. Filled triangle indi-

cates radio selected for transmitting. Unfilled

triangle indicates radio is enabled for monitor-

ing. The opposite crewmembers radio status

triangles are on the right. Lack of a triangle indi-

cates the radio is not being used/monitored (pin

pulled).

3.15 COMMUNICATIONS PANEL (COMM)

There is a COMM panel (fig 3-5) in both the pilot’s and

LBA0401

CPG’s crewstation to provide audio level control for the re-

spective crewstation. Following is a description of the

Figure 3-4. UFD Format

COMM panel controls:

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 3

3-11

TM 1-1520-251-10

3.15.5 ICS Mode Switch. The ICS mode switch pro-

vides selection of the audio keying system for commu-

nication between crew stations. Following are the three

modes that can be selected with the ICS switch:

ÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑÑÑÑÑ

ÑÑ

a. Push-To-Talk (PTT). The PTT position allows

communication only while the ICS PTT switch is being ac-

tioned.

ÑÑÑ Ñ

b. VOX. The VOX position allows communication

ÑÑÑÑÑÑ

between crewmembers only when their voice levels ex-

ceed the threshold level as set with the SENS control.

ÑÑÑ

ÑÑ

c. HOT MIC. The HOT MIC position allows continu-

ous communication between crewmembers.

ÑÑÑÑÑÑÑÑ

ÑÑ

ÑÑÑÑÑÑÑÑ

ÑÑ

3.15.6 IDENT Switch. The IDENT switch allows the

LBA0072

transponder to be placed in IDENT mode. This switch per-

forms the same function as the IDENT option label located

on the MPD XPNDR page.

Figure 3-5. Communications (COMM) Panel

3.15.7 AUX Control IFF.

a. IFF Control. The IFF control provides indepen-

3.15.1 Volume Control The volume control provides

dent volume control of the IFF MODE 4 audio.

independent volume control for the respective radio. Mon-

itoring of the radios, VCR, and ADF audio can be disabled

by pulling out the respective control knob which removes

b. Radar/Laser Warning Receiver (RLWR) Con-

the appropriate monitor status triangle from the UFD, un-

trol. The RLWR control provides independent volume

less selected as the active transmitter.

control of the RLWR audio.

3.15.2 Squelch (SQL) Switches. The SQL switches

c. Air To Air (ATA) Control. This knob is not cur-

are momentary toggle switches that provide squelch se-

rently used.

lect/deselect capability for both crewstations. There is a

SQL switch for each radio, located directly under the cor-

d. Videocassette Recorder (VCR) Control. The

responding radio volume control.

VCR control provides independent volume control of the

VCR playback audio.

3.15.3 MASTER Control. The MASTER control pro-

vides the capability to adjust the audio level of all signals

e. Automatic Direction Finder

(ADF) Con-

associated with the communication subsystem and con-

trol. The ADF control provides independent volume

trols the applicable crewstation helmet and wing connec-

control of the ADF audio.

tion volume levels.

3.16 EMERGENCY PANEL

3.15.4 Sensitivity (SENS) Control. The SENS control

provides the capability to adjust the audio threshold level

when the ICS mode switch is in the VOX position. The

The EMERGENCY panel (fig 3-6) allows selection of the

system only transmits when voice level exceeds the

transponder (XPNDR) emergency mode, tuning the UHF

threshold setting of the SENS adjustment. To increase

radio to the GUARD frequency, and zeroizing classified

sensitivity rotate control clockwise.

data.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-12

Change 3

TM 1-1520-251-10

g. IDM network parameters.

EMERGENCY EMERG

HYD

h. IDM subscribers team indications in the IDM and

GUARD

XPNDR

ZEROIZE

DP NVM.

i. TSD Waypoints, Targets/Threats, and Control

Measures.

NOTE

LBA2448

• Emergency zeroize does not erase clas-

sified data in the FCR and DTC

Figure 3-6. EMERGENCY Panel

3.17 CYCLIC GRIP COMMUNICATIONS CONTROLS

3.16.1 GUARD Button. Pressing this button tunes the

The cyclic controls provide the crew with the RADIO/ICS

UHF radio to its guard frequency, which is displayed on

Push-To-Talk (PTT) switch and the Radio Transmit Select

the UFD. The crew member pressing the GUARD button

(RTS) switch.

will cause the system to automatically RTS to the UHF ra-

3.18 ICS/RADIO FOOT CONTROLS

dio. Deselecting the GUARD button commands the sys-

tem to load the guard frequency into the last frequency

CS/Radio foot controls are identical for both crew stations

location and places last single channel frequency (and as-

and are located on the forward crew station deck. The ra-

sociated call sign) into the current frequency and call sign

dio PTT foot control is located on the left side of the crew

locations on the UFD.

station. The ICS PTT foot control is located on the right

side of the crew station.

3.16.2

XPNDR Button. Pressing this button sets a

code of 7700 in mode 3/A. The XPNDR Mode 3/A button

3.19 COMMUNICATION SUBSYSTEM DISPLAY

has to be moded ON and XPNDR MASTER button can be

FORMAT OVERVIEW

in NORM or STBY prior to activating the XPNDR emer-

gency button. The UFD provides a status of 7700 EMER

The Communication Subsystem controls and displays are

to indicate that emergency transponder mode has been

accessed through the MPDs in each crew station. The

selected. To exit the emergency transponder mode, press

paging tree (fig 3-7) illustrates the structure of the COM

the XPNDR button again, which will extinguish the light.

subsystem pages.

After deactivation, the system does not reset any codes

3.20 COMMUNICATIONS PROTOCOL

until they are entered manually or with the DTC.

The following communications protocol terminology is

3.16.3 ZEROIZE Switch. The ZEROIZE switch is ac-

used throughout this section:

tioned by first pulling it up and out of the locked position,

• Originator ID. Unique IDM ID that is assigned to

next to the forward position, and then returning the switch

the ownship in the IDM.

to the locked or after position to complete the zeroization

process. Actioning the ZEROIZE switch zeroes-out the

• Network. A network is a functionally related group

following classified data:

of subscribers assigned to a common radio

frequency, digital network, radio, and call sign.

a. COMSEC variables.

• Subscriber. A subscriber is a single member or

station assigned to a network. Each subscriber

b. FM1 and FM2 Hopsets.

has a unique subscriber ID which is stored in their

IDM.

c. FM1 and FM2 lockout sets.

•

Team Member. A team member is a subscriber

designated to receive IDM messages. There can

d. HQ1 WOD or HQ2 MWOD from radio, and SP

only be 15 team members per digital network.

NVM.

• Zone Member. A zone member is a subscriber

e. All Communications Electronic Operating Instruc-

designated to receive zone messages. There can

tions (CEOI) tables/data in DP NVM.

only be 8 zone members (including the ownship)

per digital network. A net member must be a team

f. Mode 4 (KIT-1C).

member in order to be a zone member.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 3

3-13

TM 1-1520-251-10

COM

ATHS

MAN

MSG REC

NET

FREE

ATHS

SUFFIX

MODEM

EDIT

TEXT

MSG SEND

SOI

SINC

HQ1/2

XPNDR

UTIL

EXPND

SEG

TSET

FALL BACK

FREE

CURRENT

ERF

ATHS

ERF

TEXT

MISSION

REC

SEND

Available from Menu Page

LBA2017B

Figure 3-7. COM Subsystem Paging Tree

3.21 COMMUNICATIONS (COM) PAGE

The COM page (fig 3-8) is used to manage the ten net-

works. Of the ten available networks, only eight of them

can be digital. Selecting the COM subsystem button or the

COM page button from the MENU page displays the COM

page. Various communication subsystem status windows

and control selections are provided by bezel buttons lo-

cated along the edges of the format. The paging options at

the top of the page provide access to subsystem function-

al pages.

LBA5205

Figure 3-8. COM Page

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-14

Change 2

TM 1-1520-251-10

Buttons on the COM page are described below:

3.21.9 MAN Page Button. The MAN button displays

the MAN page.

• T1

MSG SEND button

• T2

SOI button

3.21.10 GUARD VHF Button. The GUARD VHF but-

• T3

SINC (SINCGARS) button

ton selects the GUARD VHF channel.

• T4

HQ1 or HQ2 button

3.21.11 GUARD UHF Button. The GUARD UHF but-

• T5

XPNDR button

ton selects the GUARD UHF channel.

• T6

UTIL (utility) button

• L1-L5

PRESET buttons

3.21.12 ATHS Button. The ATHS button displays the

• L6

XPNDR MASTER button

ATHS page.

• R1-R5

PRESET buttons

3.21.13 MSG REC Page Button. The MSG REC but-

• R6

MAN button

ton displays the message receive (MSG REC) page only

• B2

GUARD VHF button

when there are messages in the IDM.

• B3

GUARD UHF button

• B4

ATHS button

3.21.14 CALL SIGN Status Window. The CALL SIGN

status window indicates the ownship call sign.

• B5

MSG REC button

3.21.1 MSG SEND Page Button. The MSG SEND but-

3.22 COM PAGE - PRESET SELECTED

ton displays the MSG SEND page.

The COM page preset status window is shown in Figure

3.21.2 SOI Page Button. The SOI button displays the

3-9.

SOI page.

3.21.3 SINC Page Button. The SINC button displays

the SINCGARS page.

3.21.4 HQ1 or HQ2 Page Button. The HQ1 or HQ2

button displays the appropriate page for the type of HAVE

QUICK installed.

3.21.5 XPNDR Page Button. The XPNDR button dis-

plays the XPNDR page.

3.21.6 UTIL Page Button. The UTIL button displays

the COM UTIL page.

3.21.7 PRESET Buttons. The PRESET (1-10) buttons

provide the capability to tune the VHF, UHF, FM 1, and FM

2 radios. They also provide configuration control for the

Improved Data Modem (IDM) channels. The text for each

preset button includes two lines of information. The first

line contains the unit ID, net type, and net number. The

second line contains the radio status.

LBA0403A

3.21.8 XPNDR MASTER Button. The XPNDR MAS-

TER button toggles between Standby (STBY) and Normal

(NORM) modes.

Figure

3-9.

COM Page (Preset Selected)

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-15

TM 1-1520-251-10

The following unique buttons are displayed on the COM

page when preset is selected:

• T3

TUNE VHF button

• T4

TUNE UHF button

• T5

TUNE FM1 button

• T6

TUNE FM2 button

• B6

NET page button

3.22.1 TUNE Button. The TUNE buttons are displayed

when the COM page is displayed and a preset button is

selected, or when the NET page is selected. Selecting a

TUNE button tunes that radio to the frequency displayed

and configures the channel of the IDM to the network dis-

played.

3.22.2 NET Page Button. The NET button displays the

net subscriber page. See paragraph 3.24.

3.22.3

COM PRESET Status Window. The COM

LBA0405A

PRESET status window displays the data associated with

the preset that is currently selected. Data is displayed in

the following order:

Figure

3-10.

MAN Page

• 1) Unit ID

• 2) Call Sign

• 3) VHF Frequency

The MAN page contains the following unique buttons:

• 4) UHF Frequency

• R1

VHF FREQ button

• 5) FM Frequency

• R2

UHF FREQ button

• 6) IDM Type and IDM Net Number

•

FM1 FREQ button

The Primary frequency is displayed in white and desig-

• R4

FM2 FREQ button

nated by a white arrow.

3.24 NET PAGE

3.23 MAN PAGE

The MAN page (fig 3-10) provides the capability to select

The NET page (figs 3-11 and 3-12) displays the preset

a radio button and tune to a non-preset frequency.

data associated with the selected preset.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-16

TM 1-1520-251-10

• T2

CLEAR button

• T3

TUNE VHF button

• T4

TUNE UHF button

• T5

TUNE FM1 button

• T6

TUNE FM2 button

• L1-L5

Subscriber buttons

• L6

MODEM button

• R1-R5

Subscriber buttons

• R6

EDIT button

• B2

PAGE DOWN button

• B3

PAGE UP button

• B4

TEAM button

• B5

ZONE button

3.24.1 SUFFX Page Button. SUFFX button displays

the SUFFX page. This button is not displayed when the

net member currently selected has a subscriber ID. See

paragraph 3.25.

LBA5206

3.24.2 CLEAR Button. The CLEAR button, displayed in

white, only appears if the IDM is detected to have extraneous

Figure

3-11.

NET Page - (Team member selected)

subscribers. This may occur if the crew deletes subscribers

from a net, but then performs an upload of the original sub-

scriber data from the DTC. Pressing the CLEAR button will

delete the extraneous subscribers from the IDM.

3.24.3 Subscriber Buttons. The subscriber buttons

provide the capability to assign team and zone member

status for net subscribers.

3.24.4 MODEM Page Button. The MODEM button dis-

plays the MODEM page. See paragraph 3.27.

3.24.5 EDIT Page Button. The EDIT button displays

the EDIT page. See paragraph 3.26.

3.24.6 PAGE UP and PAGE DOWN Buttons. Allows

selection between two pages of subscribers.

3.24.7 TEAM Button. The TEAM button provides the

capability to toggle team designation on or off for net sub-

scribers. This button is only displayed if the net member

currently selected has a subscriber ID.

3.24.8 ZONE Button. The ZONE button provides the

capability to toggle zone designation on or off for net sub-

scribers. This button is only displayed if the net member

LBA2569

currently selected has a subscriber ID and if there are not

already seven subscribers designated as zone members.

Figure

3-12.

NET Page - (Net member selected, no

subscriber ID)

3.25 SUFFX PAGE

The SUFFX page (fig 3-13) is accessed by selecting the

SUFFX page button from the NET page. The SUFFX

The NET page contains the following unique buttons:

page provides only that data that has been loaded

• T1

SUFFX (Suffix) button

through the DTU.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-17

TM 1-1520-251-10

LBA5012

LBA5207

Figure 3-13. SUFFX Page

Figure 3-14. EDIT Page - (Preset with IDM net)

The SUFFX page contains the following unique buttons:

The EDIT page contains the following unique buttons:

• T5

STORE button

• T2

OWNSHIP C/S button

• L1-L6

Suffix buttons

• T3

OWNSHIP LBGW button

• R1-R6

Suffix buttons

• T4

OWNSHIP TACFR button

• B2

PAGE DOWN button

• T5

OWNSHIP TEAM button

• B3

PAGE UP button

•

OWNSHIP BCST button

3.25.1 STORE Button. Selecting the STORE button

• L1

PRESET UNIT ID button

provides the capability to store the selected Suffix into a

selected subscriber button location on the NET page.

• L2

PRESET CALL SIGN button

• L3

PRESET VHF FREQ button

3.25.2

Suffix Buttons. The Suffix buttons are dis-

• L4

PRESET UHF FREQ button

played on the left and right sides of the SUFFX page.

• L5

PRESET FM FREQ button

3.25.3 PAGE UP and PAGE DOWN Buttons. Allows

• L6

PRESET IDM NET button

selection of multiple pages of suffixes.

•

MEMBER CALL SIGN button

3.26 EDIT PAGE

• R2

MEMBER SUBSCRIBER button

• R3

MEMBER DELETE button

The EDIT page (figs 3-14 and 3-15) provides the capabili-

ty to modify preset and selected subscriber buttons.

• R6

EDIT button

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-18

TM 1-1520-251-10

3.26.7 PRESET VHF, UHF, FM FREQ Buttons. The

PRESET VHF, UHF, FM FREQ buttons provides the capa-

bility to change the selected preset frequency.

3.26.8 PRESET IDM NET Button. The PRESET IDM

NET button provides the capability to assign/unassign an

IDM net to a preset.

3.26.9 MEMBER CALL SIGN Button. The MEMBER

CALL SIGN button provides the capability to modify the

selected subscriber call sign. This button is only displayed

for a preset with an assigned IDM net.

3.26.10 MEMBER SUBSCRIBER Button. The MEM-

BER SUBSCRIBER button provides the capability to

modify the selected subscriber ID.

3.26.11 MEMBER DELETE Button. The MEMBER

DELETE button provides the capability to delete the se-

LBA2570A

lected subscriber. This button is only displayed for a pre-

set with an assigned IDM net and a valid call sign has

been entered in the MEMBER CALL SIGN button.

Figure 3-15. EDIT Page - (Preset without IDM net)

3.27 MODEM PAGE

3.26.1 C/S Button. The ownship call sign (C/S) button

provides the capability to modify the current call sign as

The MODEM page (fig 3-16) provides the capability to

displayed in the call sign status window.

modify the IDM net that is assigned to the PRESET but-

ton.

3.26.2 LGBW Button. The LGBW button provides the

capability to modify the originator ID for the Longbow Pro-

tocol. If an ID is not uploaded from the DTC, this button

will be displayed with a question mark to indicate that a

valid originator ID must be entered to transmit data.

3.26.3 TACFR Button. The TACFR button provides the

capability to modify the Originator ID for the TACFIRE pro-

tocol. This button functions exactly like the ORIG button

on the ATHS page.

3.26.4 TEAM Button. The TEAM button provides the

capability to modify the TEAM ID for the TACFIRE proto-

col. This button functions exactly like the TEAM button on

the ATHS page.

3.26.5 BCST Button. The BCST button provides the

capability to modify the Broadcast ID for the TACFIRE

protocol. This button functions exactly like the BC button

on the ATHS page.

LBA1883A

3.26.6

PRESET CALL SIGN Button. The PRESET

CALL SIGN button provides the capability to modify the

preselected preset call sign.

Figure

3-16.

MODEM Page

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-19

TM 1-1520-251-10

3.27.1 PROTOCOL Button. The PROTOCOL button

d. BAUD RATE Button. The BAUD RATE button

provides the capability to select either the LONGBOW or

provides baud rate options of 16000, 8000, 2400, 1200,

TACFIRE protocol.

600, 300, 150, or 75.

LBA5013

LBA5015

Figure 3-18. MODEM Page with TACFIRE Selected

Figure 3-17. PROTOCOL Page

3.27.3 TACFIRE PROTOCOL. If the multi - state PRO-

NOTE

TOCOL button is selected to TACFIRE, the following

unique buttons are displayed.

The Longbow Protocol used in the IDM is

also known as the Air Force Applications

• PROTOCOL button

Program Development (AFAPD)

•

RETRIES button

3.27.2

LONGBOW PROTOCOL. If the multi-state

• BAUD RATE button

PROTOCOL button is selected to LONGBOW, the follow-

• AUTH button

ing unique buttons are displayed.

•

BLOCK button

• PROTOCOL button

• PREAMBLE button

• AUTO ACK button

• MONITOR button

• RETRIES button

• XMIT RADIO button

• BAUD RATE button

a. PROTOCOL button. The PROTOCOL button

a. PROTOCOL Button. The PROTOCOL button

provides the capability to select TACFIRE protocol.

provides the capability to select LONGBOW protocol.

b. AUTO ACK Button. The AUTO ACK button pro-

b. RETRIES Button. The RETRIES button pro-

vides the capability to enable or disable the auto acknowl-

vides the capability to select the number of retransmis-

edge mode.

sions the IDM performs (2, 1, or 0) with no acknowledge-

ment from a subscriber.

c. RETRIES Button. The RETRIES button pro-

vides the capability to select the number of retransmis-

c. BAUD RATE Button. The BAUD RATE button

sions the IDM performs (2, 1, or 0) with no acknowledge-

provides baud rate options of 1200, 600, 300, 150, or 75.

ment from a subscriber.

TACFIRE 1200 and TACFIRE 600 are the only options

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-20

TM 1-1520-251-10

available for TACFIRE messages sent to artillery. TAC-

NOTE

FIRE 1200 is the default for the TACFIRE nets. The slow-

er rates for the AIR NETS are to be used only if reception

• A minimum preamble of 0.4 seconds is

is poor at high rates.

required when transmitting through cryp-

to equipment. The longer the preamble,

the longer the air time.

• When establishing communications with

AFATDS, ensure that 2.3 seconds is

used by both the AH - 64D and the artil-

lery.

f. PREAMBLE Button. The PREAMBLE button is

the ON AIR time that establishes a digital link between the

radios prior to the message being sent. Selecting the

PREAMBLE button provides the capability to modify this

ON AIR time. An interval between 0.1 and 9.9 seconds

may be entered.

g. MONITOR Button. Selection of the MONITOR

button allows the crew to modify the time that the IDM lis-

tens for interfering traffic prior to transmitting the mes-

sage. A time from 0.5 seconds to 9.9 seconds or OFF may

be entered. To turn this function off the crew must enter

zero, the word OFF is displayed on the ATHS page. If

more than 15 seconds have elapsed after the SEND but-

LBA5016

ton has been depressed, the IDM will reset automatically

and the SEND button must be pressed again. Voice trans-

mission has priority over digital transmission; therefore,

Figure

3-19.

MODEM Page with TACFIRE and

the IDM will wait until the airway is clear of voice traffic if a

BAUD RATE Selected

monitor time has been selected.

h. XMIT RADIO Button. Selection of the multi -

d. AUTH Button. The AUTH two - state button al-

state XMIT RADIO button allows the crew to select the ra-

lows the crew to toggle between NONE and MANUAL. If

dio that the IDM will use to transmit the TACFIRE digital

NONE is selected, no authentication is required. This

messages. Preset options of VHF, UHF, FM1 and FM2 are

function automatically displays NONE due to use of auto-

displayed upon selection of of the XMIT RADIO button.

matic authentication. If MANUAL is selected, an operator

When the preset is selected and tuned to a radio, that ra-

input of the transmission authenticator is required each

dio will be set at XMIT RADIO. After the preset has been

time transmission is attempted. MANUAL authentication

tuned to a radio, this button allows the operator to config-

is normally only used in air - to - air or air - to - ground TAC-

ure it to a different radio. Artillery TACFIRE nets are nor-

FIRE. If MANUAL is selected, but no manual authentica-

mally set on FM1 or FM2.

tion is desired at the time of transmission, the message

will be sent on the second press of the SEND button.

3.28 MSG REC PAGE

e. BLOCK Button. The BLOCK two - state button

allows the crew to toggle between SINGLE and DOUBLE.

The MSG REC page (fig 3-20) provides the capability to

SINGLE BLOCK sends each segment of data once per

manage IDM messages that are received within the IDM

SEND. DOUBLE BLOCK sends each data segment twice

buffer. The crew is cued when a message is received by

per SEND. DOUBLE should be used when atmospheric

UFD advisory and the message appearing on the MPD.

conditions/reception are poor or when jamming is sus-

The MSG REC page button is not displayed when there

pected.

are no messages within the IDM buffer.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-21

TM 1-1520-251-10

• B2

PAGE DOWN button

• B3

PAGE UP button

NOTE

Storage of an IDM message will overwrite

the selected mission data.

3.28.1 STORE/RVW Button. The STORE/RVW button

provides the capability to store a data message or review

a LONGBOW free text or any TACFIRE message re-

ceived within or via the IDM. These buttons are only dis-

played after a message button has been selected. If a

TACFIRE message is selected for review, then upon ac-

tivation of the RVW button the page will automatically

switch to the page MSG RCVD page of the ATHS TAC-

FIRE. Refer to fig. 3-60 in the ATHS section para 3.53 for

more information.

3.28.2 DEL Button. Selecting this button deletes the

IDM message associated with the selected Message but-

LBA1887

ton.

Figure 3-20. Message Receive Page

3.28.3 LOCATION CURR/MSN1/MSN2 Buttons. The

MSG REC Page CURR, MSN1, and MSN2 buttons (fig

3-20) allow crewmembers to control where the current

The MSG REC page contains the following unique but-

message will be stored when the STORE button is se-

tons:

lected.

• T2

STORE button or RVW button

3.28.4 Message Buttons. There can be up to 12 mes-

• T3

DEL button

sages buttons per page (fig 3-21), up to 4 pages. The type

of message will be displayed, along with the call sign of

• T4

LOCATION CURR button

the subscriber who transmitted the message. New incom-

• T5

LOCATION MSN1 button

ing messages are displayed on the bottom of the page.

The example shows FREE TEXT selected.

• T6

LOCATION MSN2 button

• L1-L6

Message Receive buttons

3.28.5 PAGE UP and PAGE DOWN Buttons. Allows

• R1-R6

Message Receive buttons

selection of multiple pages of received IDM messages.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-22

TM 1-1520-251-10

3.29 IMPROVED DATA MODEM (IDM) PAGE

The IDM page (fig 3-23) provides controls to send MIS-

SION 1, MISSION 2, or ALL IDM/SOI data files via the

IDM to team members. It also provides access to the

CURRENT MISSION page which is used for sending se-

lected components of the current mission to team mem-

bers.

LBA1884

Figure 3-21. Message Buttons (FREE TEXT

selected)

3.28.6

FREE TEXT Message Window. The FREE

TEXT Message Window (fig 3-22) allows the crewmem-

bers to review Free Text messages received over the IDM.

LBA5207

Figure 3-23. IDM Page

The IDM page contains the following unique buttons:

• L1

MISSION 1 button

• L2

MISSION 2 button

• L3

ALL IDM/SOI buttons

• R1

CURRENT MISSION button

• R6

SEND button

3.29.1 MISSION 1 (or 2) Buttons. The IDM MISSION

buttons provides the capability to transmit the MISSION 1

(or 2) files upon the selection of the IDM SEND button.

3.29.2 ALL IDM/SOI Button. The ALL IDM/SOI button

provides the capability to transmit the SOI and IDM net

files when the SEND button is selected.

LBA1886

3.29.3 CURRENT MISSION Button. The CURRENT

MISSION button displays the CURRENT MISSION page.

Figure

3-22. FREE TEXT Message Window

See paragraph 3.30.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-23

TM 1-1520-251-10

3.29.4 SEND Button. The SEND button is only dis-

• L4

ROUTE (CURRENT) button

played if the MISSION 1 (or 2) button or ALL IDM/CEOI

• L5

TGT/THRT button

button has been selected. The selection of the SEND but-

• L6

CONTROL MEASURES button

ton will command the system to transmit the selected files

through the selected channel of the IDM. The data is only

• R2

LASER CODES button

sent to team members.

• R6

SEND button

• B4

ALL button

3.30 CURRENT MISSION PAGE

• B5

ROUTE button

The CURRENT MISSION button displays the CURRENT

3.30.1 WAYPOINTS Button. The WAYPOINTS button

MISSION page (fig 3-24). The CURRENT MISSION page

allows sending of the current waypoints file over the IDM.

provides the capability to individually select the type of in-

formation to be sent over the IDM. Selection of the ALL

3.30.2

AREAS Button. The AREAS button allows

button allows transmission of all current files. Once an

sending of the current engagement areas file over the

item is selected, selecting the SEND button will initiate

IDM.

transmission over the IDM.

3.30.3 LINES Button. The LINES button allows send-

ing of the current phase lines file over the IDM.

3.30.4

ROUTE Button. The ROUTE button allows

sending of the current route file over the IDM.

3.30.5 TGT/THRT Button. The TGT/THRT button al-

lows sending of the current target and threats file over the

IDM.

3.30.6

CONTROL MEASURES Button. The CON-

TROL MEASURES button allows sending of the current

control measures file over the IDM.

3.30.7 LASER CODES Button. The LASER CODES

button allows sending the current laser codes file over the

IDM.

3.30.8 SEND Button. The SEND button is only dis-

played if a valid CURRENT MISSION file is selected to be

LBA1990A

sent. The selection of the SEND button will command the

system to transmit the selected files through the selected

Figure 3-24. CURRENT MISSION Page

channel of the IDM. The data is only sent to team mem-

bers.

The CURRENT MISSION page contains the following

3.30.9 ALL Button. The ALL button allows sending of

unique buttons:

all current mission files over the IDM.

• L1

WAYPOINTS button

3.30.10 ROUTE Button. The ROUTE button presents

• L2

AREAS button

all of the current routes files available for sending over the

• L3

LINES button

IDM (fig 3-25).

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-24

TM 1-1520-251-10

3.31 CURRENT MISSION - ROUTE SELECTIONS

3.32 FREE TEXT PAGE

The ROUTE button (fig 3-25) provides the capability to se-

The FREE TEXT page (fig 3-26) provides the operator the

lect various routes.

capability to create a free text message for transmission

through the IDM.

LBA1991A

LBA1992A

Figure 3-26. FREE TEXT Page

Figure 3-25. ROUTE button selected

The FREE TEXT page contains the following unique but-

The ROUTE button provides the following selections:

tons:

• L1-L5

ROUTE buttons

• L1-L4

TEXT (1-4) buttons

• B2

PAGE DOWN button

• R6

SEND button

• B3

PAGE UP button

• B4

CLEAR button

• B4

ALL button

3.32.1 TEXT Buttons. Each TEXT (1-4) button pro-

vides the capability to load four 44-character messages

3.31.1 ROUTE Buttons. The ROUTE buttons allows

into the system for transmission by the ID.

selection of a single route file to send over the IDM.

3.32.2 SEND Button. The SEND button transmits the

3.31.2 PAGE UP and PAGE DOWN Buttons. Allows

FREE TEXT message through the selected channel of the

selection between two lists of routes.

IDM. The data is only sent to team members.

3.31.3 ALL Button. The ALL button allows sending of

3.32.3 CLEAR Button. The CLEAR button clears the

all route files over the IDM.

data contained on the FREE TEXT page.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-25

TM 1-1520-251-10

3.33 SIGNAL OPERATING INSTRUCTIONS (SOI)

Page

The SOI page (fig 3-27) provides the capability to authen-

ticate communications transmissions.

LBA2021A

Figure 3-28. SOI Page - AUTH CHALLENGE

3.33.2 AUTH REPLY Button. The AUTH REPLY but-

ton (fig 3-29) provides the capability to enter a challenge

code and extract the reply code from the challenge/reply

LBA0409A

table and display the code within the AUTH CHALLENGE

REPLY window.

Figure 3-27. SOI Page

The SOI page contains the following unique buttons:

• L1

SEARCH UNIT ID button

• L2

SEARCH CALL SIGN button

• L3

SEARCH VHF FREQ button

• L4

SEARCH UHF FREQ button

• L5

SEARCH FM FREQ button

• R1

AUTH CHALLENGE button

• R2

AUTH REPLY button

• R4

XMSN AUTH INITIATE button

• R5

XMSN AUTH VALIDATE button

• B3

EXPND (Expander) page button

3.33.1

AUTH CHALLENGE Button. The AUTH

LBA2022A

CHALLENGE button (fig 3-28) provides the capability to

extract the challenge/reply table and display the codes

within the AUTH CHALLENGE REP window.

Figure 3-29. SOI Page - AUTH REPLY

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-26

TM 1-1520-251-10

3.33.3

XMSN AUTH INITIATE Button. The XMSN

AUTH INITIATE button (fig 3-30) extracts the transmit au-

thentication codes from the transmit authentication table

and display the codes within the XMSN AUTH window.

The ALL CODES USED message will be displayed in

white.

LBA2024A

Figure 3-31. SOI Page - XMSN AUTH VALIDATE

3.33.5

SEARCH Mode. The SEARCH buttons (fig

3-32) provides the capability to enter a unit ID, frequen-

cies or call sign. The system will then search the SOI data-

base, extract and display the associated unit ID, frequen-

cies and call sign. The data displayed can then be loaded

into one of the ten preset locations.

LBA2023A

Figure 3-30. SOI Page - XMSN AUTH INITIATE

3.33.4 XMSN AUTH VALIDATE Button. The XMSN

AUTH VALIDATE button (fig 3-31) provides the capability

to verify a transmit authentication code from the transmit

authentication table. The VALID label is displayed when

the transmit authentication matches the transmit authenti-

cation code entered through the KU. The INVALID label is

displayed when the transmit authentication table does not

LBA2606A

match the transmit authentication code entered through

the KU.

Figure 3-32. SOI Page - SEARCH INVALID

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-27

TM 1-1520-251-10

a. Invalid Window. An Invalid Window is dis-

preset. Which causes return to the main CEOI page for-

played on the SOI page if no corresponding unit ID, fre-

mat.

quency, or call sign is found.

3.33.7 Expander (EXPND) Page Button. The EXPND

button displays the EXPND page. See paragraph 3.34.

3.33.6 STORE Status Window. Upon completion of a

successful search of the SOI database, the SOI page is

3.34 EXPANDER (EXPND) PAGE

displayed containing a status window with a STORE label

on top (fig 3-33). The STORE status window contains the

The EXPND page (fig 3-34), a view - only page, provides

unit ID, call sign, and frequencies.

the capability to view the expander lookup table. The ex-

pander lookup table displays the one character expander

and descriptor field. Up to 26 expanders may be displayed

from the lookup table.

LBA1993A

Figure 3-33. SOI Page - SEARCH/STORE

LBA0689A

Figure 3-34. EXPND Page

a. Search/Store Buttons. The Search/Store pre-

set buttons provides the capability to store data that is

contained within the STORE status window into one of the

3.35 SINCGARS (SINC) PAGE

10 preset locations, as shown in white and designated by

The SINC page (figs 3-35 through 3-39) provides the ca-

an arrow.

pability to control the FM radios and their FH modes. The

b. Search ABORT Button. The Search ABORT

radio control buttons on the SINC page are only displayed

button provides the capability to abort the storing of a new

if the radio is installed.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-28

TM 1-1520-251-10

to the ERF Receive Page. FH/M mode allows access to

the ERF Send Page.

3.35.3

MAN FREQUENCY Button. The MAN FRE-

QUENCY button provides the capability to change the

Manual frequency of the selected radio.

3.35.4

MAN TUNE Button. The MAN TUNE button

provides the capability to tune the radio to the frequency

that is displayed within the MAN FREQUENCY button.

3.35.5

CUE FREQUENCY Button. The CUE FRE-

QUENCY button provides the capability to change the

Cue frequency of the selected radio.

3.35.6 CUE TUNE Button. The CUE TUNE button pro-

vides the capability to tune the radio to the frequency that

is displayed within the CUE FREQUENCY button.

3.35.7 HOPSET Button. The HOPSET button provides

LBA5015

seven options that include the six HOPSET buttons and

the MAN button. The hopset ID selected determines the

radio FH characteristics (hopping rate, frequencies, and

Figure 3-39. SINC Page - ERF RECEIVE SELECTED

frequency order).

The SINC page contains the following unique buttons:

3.35.8 OFFSET Button. The OFFSET button provides

the capability to control the offset (-10K,

-5K, 0, +5K,

• L1

RADIO button

+10K) from the single channel FM frequency.

• L2

SINC 1 MODE or SINC 2 MODE buttons

3.35.9 LATE NET Button. The LATE NET button is

• L3

MAN FREQUENCY button

used to synchronize to an operational net whose TOD is

• L4

MAN TUNE button

not within the 4 second (plus/minus) frequency hopping

communication window. The late net function may only be

• L5

CUE FREQUENCY button

used if the two net TODs are within 1 minute (plus/minus)

• L6

CUE TUNE button

of each other. This button is only displayed when the SINC

• R1

HOPSET button

mode is FH.

• R2

OFFSET button

3.35.10 CLOCK GPS TIME Button. The GPS TIME

• R3

LATE NET button

button causes the current time from the EGI to be loaded

• R4

CLOCK GPS TIME button

into the radio and extracts that time from the selected ra-

dio and displays the data within the DATE/TIME button.

• R5

CLOCK FM TIME button

• R6

CLOCK FM DATE/TIME button

3.35.11 CLOCK FM TIME Button. The FM TIME but-

• B6

ZERO button

ton extracts the current time from the selected radio and

displays the data within the DATE/TIME button.

3.35.1 RADIO Button. The RADIO button provides the

capability to toggle the display between the FM1 and the

3.35.12

CLOCK FM DATE/TIME Button. The FM

FM2 radio controls.

DATE/TIME button provides the capability to change the

date and time currently loaded into the selected radio.

3.35.2 SINC MODE Button. The SINC MODE button

This data is displayed for 1 minute, then is considered

provides the capability to control the mode of the selected

stale.

radio. The button provides options of SINC SC, SINC FH,

and SINC FH/M (Frequency Hopping/Master). SC mode

3.35.13 ZERO Button. The ZERO button provides the

allows access to the ERF Page. FH mode allows access

capability to zeroize the FM radio.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-30

TM 1-1520-251-10

3.35.14 ERF RECEIVE WINDOW. The white ERF RE-

CEIVE WINDOW will display on the SINC, ERF, and ERF

SEND pages whenever the ERF RECEIVE button (R1) on

the ERF RECEIVE page is left selected for receipt of mul-

tiple ERFs.

3.36 ERF RECEIVE PAGE

The ERF RECEIVE page (figs 3-40 and 3-41) provides

the capability to initiate receive of hopsets and lockouts.

LBA5211

Figure 3-41. ERF RECEIVE Page - Lockout Mode

3.36.1 ERF MODE Button. The ERF MODE button op-

erates in two modes: HOPSET and LOCKOUT. The HOP-

SET mode configures the system for the reception of hop-

sets. The LOCKOUT mode configures for the reception of

lockout sets.

3.36.2 ERF FUNCTION. The ERF FUNCTION button

LBA1995A

provides the capability to select REVIEW and DELETE for

hopsets and lockouts and COPY functions for hopsets.

3.36.3 ERF HOPSET Buttons. Selecting one of the

Figure 3-40. ERF RECEIVE Page - Hopset Mode

ERF HOPSET buttons (figs 3-40) stores the hopset that is

displayed within the RECEIVE hopset window to that but-

ton.

The ERF RECEIVE page contains the following unique

buttons:

3.36.4 ERF LOCKOUT Buttons. The ERF LOCKOUT

buttons are only selectable when deleting LOCKOUTS.

• L1

ERF MODE button

• L2

ERF FUNCTION button

3.36.5 ERF RECEIVE Button. The ERF RECEIVE but-

ton provides the capability to command the radio to the

• L3-L6

ERF HOPSET/LOCKOUT buttons

ERF receive mode. The radio remains in the ERF receive

mode to receive multiple ERFs for 5 minutes unless the

• R1

ERF RECEIVE button

ERF RECEIVE button is manually deselected or automat-

• R2

ERF CLEAR button

ically deselected when a confirmed CLEAR (R2) is per-

formed. When a hopset or lockout set is received, this but-

• R3-R6

ERF HOPSET/LOCKOUT buttons

ton will be barriered until the HOPSET or LOCKOUT is

• B3

ERF STORE button

either cleared or stored (fig 3-42).

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-31

TM 1-1520-251-10

3.36.6 ERF CLEAR Button. The ERF CLEAR button

provides the capability to clear a HOPSET or LOCKOUT

from the holding memory buffer. The CLEAR button will

display upon receipt of a HOPSET or LOCKOUT and

when in COPY or EDIT modes.

NOTE

A YES/NO confirmation will only display

when the CLEAR button is used to clear a

received HOPSET or LOCKOUT.

3.36.7 ERF RECEIVE Button. The ERF RECEIVE but-

ton provides the capability to command the radio to the

ERF receive mode. The radio remains in the ERF receive

mode for 5 minutes or until the deselection of the ERF RE-

CEIVE button.

3.36.8 ERF STORE Button. The STORE button provides

the capability to load the lockout set into one of the eight lock-

out set locations within the current lockout window.

3.36.9 RECEIVED HOPSET Window. The RECEIVED

LBA5213

HOPSET window (fig 3-42) is displayed when the system

has received a valid HOPSET. The HOPSET will be dis-

Figure 3-43. ERF RECEIVE Page - Lockout

played in white.

Received

3.37 ERF SEND PAGE

The ERF SEND page (figs 3-44 and 3-45) provides the

capability to send hopsets and lockouts.

LBA5212

Figure 3-42. ERF RECEIVE Page - Hopset Received

LBA5214

3.36.10

RECEIVED LOCKOUT Window. The RE-

CEIVED LOCKOUT window (fig 3-43) is displayed when

the system has received a valid LOCKOUT.

Figure 3-44. ERF SEND Page - Hopset Mode

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-32

TM 1-1520-251-10

The ERF SEND page contains the following unique but-

3.37.4 ERF LOCKOUT Buttons. The ERF LOCKOUT

tons:

buttons provides the capability to select a lockout to be

transmitted through the ERF process. The current lockout

• L1

ERF MODE button

to be sent is displayed in the SEND LOCKOUT window.

• L2

ERF FUNCTION button

• L3-L6

ERF HOPSET/LOCKOUT buttons

3.37.5 ERF SEND Button. The ERF SEND button pro-

vides the capability to command the radio to transmit the

• R1

ERF SEND button

hopset or lockout selected for sending. Once the trans-

• R2

ERF CLEAR button

mission is complete the ERF SEND button is removed.

• R3-R6

ERF HOPSET/LOCKOUT buttons

3.37.6 ERF CLEAR. The ERF CLEAR button clears

the hopset or lockout that was selected for sending. The

ERF CLEAR button removes the ERF SEND button and

itself.

3.37.7 SEND HOPSET Window. The SEND HOPSET

window (fig 3-46) displays the hopset data in that is to be

transmitted through the ERF process with the selection of

the ERF SEND button.

LBA5215

Figure 3-45. ERF SEND Page - Lockout Mode

3.37.1 ERF MODE Button. The ERF MODE button op-

erates in two modes: HOPSET and LOCKOUT.

3.37.2 ERF FUNCTION. The ERF FUNCTION button

provides the capability to select REVIEW and DELETE

hopsets and lockouts, and COPY and EDIT functions for

LBA5216

hopsets.

Figure 3-46. ERF SEND Page - Hopset Send

3.37.3 ERF HOPSET Buttons. The ERF HOPSET but-

tons provides the capability to select a hopset to be trans-

mitted through the ERF process. The current hopset to be

3.37.8 SEND LOCKOUT Window. The SEND LOCK-

sent is displayed in the SEND HOPSET window and an

OUT window (fig 3-47) displays the lockout data in that is

intermittent beep will be heard until the hopset is sent or

to be transmitted through the ERF process with the selec-

cleared.

tion of the ERF SEND button.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-33

TM 1-1520-251-10

3.38 HQ1 (HAVE QUICK) PAGE

The HQ1 button (fig 3-49) displays the HQ1 page.

LBA5217

Figure 3-47. ERF SEND Page - Lockout Send

LBA5219

Figure 3-49. HQ1 Page

3.37.9 ERF SEND Page - Hopset Edit. The EDIT func-

tion is only available for hopsets (fig 3-48).

• L1

NET button

• L2

HQ MODE button

• L5

TONE button

• R3

TOD SEND button

• R4

TOD GPS TIME button

• R5

TOD RECEIVE button

• R6

TOD EMERGENCY button

• B4

SEG (Segment) button

• B5

TSET (Training Setup) button

3.38.1 NET Button. The net numbers enable multiple

station pairs to operate simultaneously using the same

Word of Day and Time of Day without interference.

3.38.2 HQ MODE Button. The HQ MODE button pro-

vides the capability to control the current mode. The but-

ton provides options of SC, FH, and TRNG (Training).

3.38.3 TONE Button. The TONE button enables crew

members to enable/disable the HAVE QUICK tones.

3.38.4

TOD SEND Button. The TOD SEND button

transmits TOD data. A tone in the headset sounds when

LBA5218

the TOD is transmitted. The TOD SEND button is not dis-

played when the HQ1 MODE is set to the HQ1 FH or HQ1

Figure

3-48.

ERF SEND Page - Hopset Edit

TRNG mode.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-34

TM 1-1520-251-10

3.38.5 TOD GPS TIME Button. The TOD GPS TIME

button configures the UHF radio to accept the TOD as the

time from the EGI. The TOD GPS TIME button is not dis-

played when the HQ1 MODE is set to the HQ1 FH or HQ1

TRNG mode.

NOTE

When initiating the TOD RECEIVE button,

notify other crewmember to prevent inad-

vertent termination of reception.

3.38.6

TOD RECEIVE Button. The TOD RECEIVE

button configures the UHF radio to receive the TOD. A

tone is generated to provide the crew feedback with that

the reception was successful. The crew has the capability

to terminate the receive mode prior to timing out by press-

ing the TOD RECEIVE button again. The TOD RECEIVE

LBA5220

legend is not displayed when the HQ1 MODE is set to the

HQ1 FH or HQ1 TRNG modes.

Figure 3-50. HQ1 SEG Page

• L1-L6

SEG buttons

• R6

UPDATE button

3.38.7 TOD EMERGENCY Button. The TOD EMER-

GENCY button generates a pseudo TOD which can be

NOTE

utilized as a reference TOD when no other TOD is avail-

able. The TOD SEND button is selected to transmit the

The segments displayed on the segment

TOD EMERGENCY. The TOD EMERGENCY button is

page are not necessarily the segments ac-

not displayed when the HQ1 MODE is set to the HQ1 FH

tive in the UHF radio. The UPDATE button

or HQ1 TRNG modes.

on the HQ1 must be selected following mod-

ification of the segments on the SEG page

to transfer the modified segments to the

UHF radio.

3.38.8 SEG Page Button. The SEG button displays the

HQ1 SEG page.

3.39.1 SEG Buttons. The SEG buttons change any of

the six WOD segments. At least 1 segment must be

loaded into the UHF radio for FH operation. The SEG but-

tons are not selectable when the HQ1 MODE is set to the

3.38.9 TSET Page Button. The TSET button displays

HQ1 FH or HQ1 TRNG modes. Upon power up, the state

the HQ1 TSET page. See paragraph 3.40.

at last shutdown is restored if no DTC is present.

3.39.2

UPDATE Button. The UPDATE button com-

mands the system to load the current segments that are

3.39 HQ1 SEG PAGE

displayed on the SEG page into the radio. A tone is gener-

ated when a crewmember selects the UPDATE button as

a result of a valid WOD entry into the radio. The UPDATE

The HQ1 SEG button (fig 3-50) displays the HQ1 SEG

button is not displayed when the HQ1 MODE is set to the

page.

HQ1 FH or HQ1 TRNG modes.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-35

TM 1-1520-251-10

3.40 HQ1 TSET PAGE

The TSET button displays the HQ1 TSET page (fig 3-51).

LBA5222

Figure 3-52. HQ2 Page

The HQ2 page (fig 3-52) contains the following unique

LBA5221

buttons:

Figure 3-51. HQ1 TSET Page

• R1

CALENDAR DAY button

• B4

SEG (Segment) button

• B5

TSET (Training Setup) button

The HQ1 TSET page contains the following unique but-

tons:

3.41.1

CALENDAR DAY Button. The CALENDAR

DAY button provides the capability to change the calendar

• L1

TRAINING NET button

day. The calendar day is the internal date utilized by the

• L2-L4

FREQ buttons

UHF radio. When the WOD and CALENDAR DAY data

fields match, the associated segments become active, en-

• R2-R4

FREQ buttons

abling frequency hopping communication.

3.40.1 TRAINING NET Button.The TRAINING NET but-

3.41.2 SEG Page Button. The SEG button displays the

ton provides the capability to change the training net.

HQ2 SEG page.

3.40.2 FREQ Buttons. The FREQ buttons provide the

3.41.3 TSET Page Button. The TSET button displays

capability to change the six training frequencies.

the HQ2 TSET page.

3.41 HQ2 PAGE

3.42 HQ2 SEG PAGE

The HQ2 button (fig 3-52) displays the HQ2 page.

The SEG button (fig 3-53) displays the HQ2 SEG page.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-36

TM 1-1520-251-10

3.42.5

UPDATE Button. The UPDATE button com-

mands the system to load the current segments that are

displayed on the SEG page into the radio. A tone is gener-

ated when a crewmember selects the UPDATE button as

a result of a valid WOD entry into the radio. The UPDATE

button is not displayed when the HQ2 MODE is set to the

HQ2 FH or HQ2 TRNG modes.

3.43

(HQ2) TSET PAGE

The HQ2 TSET button (fig 3-54) displays the HQ2 TSET

page.

LBA5223

Figure 3-53. HQ2 SEG Page

The SEG page (fig 3-53) contains the following unique

buttons:

• L1-L6

SEG buttons

• R1

PREVIOUS WOD button

• R2

WOD button

• R3

NEXT WOD button

3.42.1 SEG Buttons. The SEG buttons change any of

the six WOD segments. At least one segment must be

LBA5224

loaded into the UHF radio for FH operation. The SEG but-

tons are not selectable when the HQ2 MODE is set to the

FH or TRNG modes. Upon power up, the state at last

Figure 3-54. HQ2 TSET Page

shutdown is restored if no DTC is present.

3.42.2

PREVIOUS WOD Button. The PREVIOUS

The HQ2 TSET page button (fig 3-54) contains the follow-

WOD button is used to decrement and display 1 of the 6

ing unique buttons:

Word of Days that is loaded into the system.

• L1

TRAINING NET button

3.42.3 WOD Button. The WOD button determines the

• L2-L5

FREQ buttons

Word of Day assignment. When the CALENDAR DAY and

a WOD that have been loaded into the radio match, the

• R2-R5

FREQ buttons

associated segments become active, enabling FH com-

• R6

TRAINING UPDATE button

munications. The radio knows which WOD to activate by

• B2

PAGE DOWN button

the number assigned to it during loading.

• B3

PAGE UP button

3.42.4 NEXT WOD Button. The NEXT WOD button is

used to increment and display 1 of the 6 Word of Days that

3.43.1 TRAINING NET Button. The TRAINING NET

is loaded into the system.

button provides the capability to change the training net.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-37

TM 1-1520-251-10

3.43.2 FREQ Buttons. The FREQ buttons provide the

• B2

ANTENNA button

capability to change the 16 training frequencies.

• B5

IDENT button

3.43.3 TRAINING UPDATE Button. The TRAINING

3.44.1 MODE 1 Button. The MODE 1 button enables/

UPDATE button commands the system to load the train-

disables MODE 1

ing frequencies that are displayed on the TSET page into

3.44.2 MODE 2 Button. The MODE 2 button enables/

the UHF radio. A tone is generated when the crew selects

disables MODE 2

the TRAINING UPDATE button.

3.44.3 MODE 3/A Button. The MODE 3/A button en-

3.43.4 PAGE UP and PAGE DOWN Buttons. Allows

ables/disables Mode 3/A. When MODE 3/A button is se-

selection between two pages of training frequencies.

lected OFF, the MODE C button is automatically turned

3.44 XPNDR PAGE

OFF.

3.44.4 MODE C Button. The MODE C button enables/

The XPNDR page (fig 3-55) provides the capability to ac-

disables the MODE C transmission. When MODE C but-

cess transponder functions.

ton is selected ON, the MODE 3/A button is automatically

turned ON.

3.44.5 MODE 4 Button. The MODE 4 button enables/

disables Mode 4. The Mode 4 Code data field on the UFD

is updated when the mode has been been changed. The

Mode 4 warning is a tone which is generated by the

XPNDR in response to a Mode 4 incompatible code.

3.44.6 XPNDR MASTER Button. The XPNDR MAS-

TER button toggles between Standby (STBY) and Normal

(NORM) modes.

3.44.7 CODE MODE 1 Button. The CODE MODE 1 but-

ton provides the capability to change the MODE 1 code.

NOTE

• Mode 2 must be manually entered on the

face of the APX - 100.

• Due to the APX-118 hardware and soft-

ware fielding plan, an interim alternative

MODE 2 entry procedure must be per-

formed.

LBA5225

3.44.7A APX - 118 CODE MODE 2 Entry.

1. MODE 3A - Select.

Figure 3-55.

XPNDR Page

NOTE

If the assigned mode 2 code is not entered

The XPNDR page contains the following unique buttons:

within 15 seconds,

2222 will be displayed as

• L1

MODE 1 button

the current MODE 3/A code.

• L2

MODE 2 button

2. Mode 2 code - Enter “2222” followed by as-

• L3

MODE 3/A button

signed mode 2 code, within 15 seconds (exam-

• L4

MODE C button

ple: 2222xxxx).

• L5

MODE 4 button

3.44.8 CODE MODE 3/A Button. The CODE MODE 3/A

• L6

XPNDR MASTER button

button provides the capability to change the MODE 3/A code.

• R1

CODE Mode 1 button

3.44.9 CODE MODE 4 Button. The CODE MODE 4 but-

• R2

CODE Mode 3/A button

ton toggles between XPNDR code MODE 4 A and B. The

• R3

CODE Mode 4 button

code Mode 4 data field is updated when the code has been

• R4

REPLY button

changed. The CODE MODE 4 button is not displayed if the

• R6

MODE 4 HOLD button

KIT-1C computer is not installed.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-38

Change 3

TM 1-1520-251-10

3.44.10 REPLY Button. The REPLY button controls

The COM UTIL page contains the following buttons:

the feedback the crew will receive when the XPNDR sys-

• L1

UHF MODE button

tem responds to a Mode 4 interrogation. The button pro-

vides options of REPLY UFD/AUDIO, REPLY UFD, and

• L2

FM1 MODE button

REPLY OFF.

• L3

FM2 MODE button

• L4

CNV UHF button

3.44.11 MODE 4 HOLD Button. Selecting the MODE 4

HOLD button prevents erasure of the Mode 4 Codes in

• L5

CNV FM1 button

the Kit-1C computer when the aircraft is on the ground

• L6

CNV FM2 button

and power is removed from the XPNDR system. The

• R1

HQ MODE button

MODE 4 HOLD button is not displayed if the Kit-1C com-

puter is not installed.

• R2

SINC 1 MODE button

• R3

SINC 2 MODE button

3.44.12 ANTENNA Button. The ANTENNA button al-

• R4

UHF GUARD RECEIVER button

lows selection of the antenna used for transmitting and re-

• R5

FM1 IFM button

ceiving XPNDR interrogations. The button provides op-

tions of ANTENNA TOP, ANTENNA Diversity (DIV), and

• R6

SOI DAY button

ANTENNA Bottom (BOT).

• B2

VHF Bandwidth button

• B3

UHF Bandwidth button

3.44.13 IDENT Button. The IDENT button commands

the transponder to transmit Modes 1, 2, and 3/A if ON.

• B4

VHF TONE button

The IDENT button is not displayed if XPNDR MASTER

• B5

UHF TONE button

button is in STBY mode or if Modes 1, 2, and 3/A are all

• B6

FALL BACK button

OFF, regardless of the XPNDR MASTER mode.

3.45.1 UHF MODE Button. The UHF MODE button

3.45 COMMUNICATIONS UTILITY (UTIL) PAGE

controls the operation of the UHF KY-58. The button pro-

vides options of CIPHER, PLAIN, and RECEIVE.

The COM UTIL page (fig 3-56) provides the capability to

access communication functions.

3.45.2 FM1 MODE Button. The FM1 MODE button

controls the operation of the FM1 embedded COMSEC

device. The button provides options of CIPHER, PLAIN,

and RECEIVE.

3.45.3 FM2 MODE Button. The FM2 MODE button

controls the operation of the FM2 embedded COMSEC

device. The button provides options of CIPHER, PLAIN,

and RECEIVE.

NOTE

When CNVs are loaded into the radios,

there is no indication in the crewstation as to

which CNV was loaded into which radio.

3.45.4 CNV UHF Button. The CNV UHF button pro-

vides the capability to change the UHF crypto net variable.

3.45.5 CNV FM1 Button. The CNV FM1 button pro-

vides the capability to change the FM1 embedded COM-

SEC device’s crypto net variable.

LBA0415A

3.45.6 CNV FM2 Button. The CNV FM2 button pro-

vides the capability to change the FM2 embedded COM-

Figure 3-56. COM UTIL Page

SEC device’s crypto net variable.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-39

TM 1-1520-251-10

3.45.7 HQ MODE Button. The HQ MODE button pro-

NOTE

vides the capability to control the current mode. The but-

• The VHF TONE button causes the tone

ton provides options of SC, FH, and TRNG (Training).

to be transmitted over the air.

• When Tacfire protocol is active, an audi-

ble tone will be transmittted over the air.

3.45.8 SINC 1 MODE Button. The SINC 1 MODE but-

ton provides the capability to control the mode of the se-

• When Longbow (AFAPD) protocol is ac-

lected FM1 radio. The button provides options of SC, FH,

tive, no audible tone and a “dead carrier”

and FH/M.

will be transmitted over the air.

3.45.16 UHF TONE Button. The UHF TONE button

enables the UHF tone. The tone may be used to set the

3.45.9 SINC 2 MODE Button. The SINC 2 MODE but-

volume and perform maintenance on the UHF radio.

ton provides the capability to control the mode of the se-

When a crewmember selects the UHF TONE button, the

lected FM2 radio. The button provides options of SC, FH,

radio generates the tone for 5 seconds.

and FH/M.

NOTE

The UHF TONE button causes the tone to

3.45.10 UHF GUARD RECEIVER Button. The UHF

be transmitted over the air.

GUARD RECEIVER button enables/disables the dedi-

cated guard receiver. This button is disabled and barri-

3.45.17 FALL BACK Page Button. The FALL BACK

ered if the UHF radio is tuned to the Guard frequency.

page is accessed by selecting the FALL BACK button on

the COM UTIL page. See paragraph 3.46.

3.45.11 FM1 IFM Buttons. The FM1 IFM button con-

3.46 FALL BACK PAGE

trols the Improved Frequency Modulation amplifier of the

FM1 radio. The button provides options of HIGH, NORM,

The FALL BACK page (fig 3-57) provides the capability to

LOW, and OFF.

set the system into a FALL BACK mode in the event of

Communication Interface Unit (CIU) failure.

3.45.12 SOI DAY Button. The SOI DAY button pro-

vides the capability to toggle between the two different

days of SOI data that are displayed within the communica-

tions subsystem.

3.45.13 VHF Bandwidth Button. The VHF Bandwidth

button provides the capability to toggle between the WB

(Wide Bandwidth) and NB (Narrow Bandwidth) modes.

3.45.14 UHF Bandwidth Button. The UHF Bandwidth

button provides the capability to toggle between the WB

(Wide Bandwidth) and NB (Narrow Bandwidth) modes.

3.45.15 VHF TONE Button. The VHF TONE button en-

ables the VHF tone. The tone may be used to set the vol-

ume and perform maintenance on the VHF radio. When a

LBA2574A

crewmember selects the VHF TONE button, the radio

generates the tone for 5 seconds.

Figure 3-57. FALL BACK Page

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-40

TM 1-1520-251-10

3.46.1 FALL BACK Enable Button. The FALL BACK

• UHF radio will go secure if a KY- 58 is installed and

enable button (fig 3-58) provides the capability to mode

turned ON. If the FILL position selected is not

the communication subsystem to a Fall Back mode. When

loaded with a CNV, only plain radio reception is

a crewmember selects the FALL BACK enable button,

available. Attempting to transmit will result in a

the system is set to the FALL BACK mode and the UFD

steady tone.

displays the advisory message FALL BACK.

• ICS communication between the Pilot and CPG is

moded to Hot MIC (TEMPEST MIC Only).

3.47 ARC-164 HAVE QUICK (HQ) PROCEDURES

NOTE

HQ2 is standard. If HQ1 is installed, the air-

craft will configure automatically. HQ1 has

only one WOD and six TSET (training) fre-

quencies.

3.47.1 Automatic Loading HQ Data.

NOTE

• When using the DTU to load HQ data into

the aircraft, all HQ data is loaded.

• TSET HQ data must be entered manually

into the aircraft. There is no DTU upload

capability.

1. DTU - Select MASTER LOAD.

LBA2575A

Figure

3-58.

UTIL Page - FALL BACK Enable

2. DTU DATA COMMUNICATIONS - Select ALL

or MWOD.

3.47.2 Manual Loading HQ Data.

The following functions are moded with the selection of

the FALL BACK mode:

NOTE

• Always use NEXT WOD or PREVIOUS

NOTE

WOD when indexing between WOD seg-

• The pilot and CPG floor, push to talk

ment lists. DO NOT use the WOD entry

switches are inoperative when operating

with the keyboard as this only renames

the CIU in the Fall Back mode.

the WOD segment list currently dis-

played.

• Operating in the Fall Back mode requires

• The last two digits of the first segment in

a TEMPEST microphone to communi-

any WOD specifies the hoprate in the FH

cate on either intercom or the the radios.

mode:

xxx.x00 (slowest)

• Pilot is RTS to the UHF radio.

xxx.x25

• Pilot and CPG radio monitor levels are defaulted

xxx.x50

to a fixed level.

xxx.x75 (fastest)

Best results for FH CIPHER (secure), use

• CPG is RTS to the VHF radio.

hoprates between xxx.x00 or xxx.x25.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

Change 4

3-41

TM 1-1520-251-10

• The calendar day (via GPS/TOD RE-

9. NET - Enter.

CEIVE/CALENDAR DAY) number speci-

fies which WOD segment list the radio

10. CALENDAR DAY - Enter.

will use.

11. HQ2 - Deselect when complete.

• Operational NET numbers are allocated

as follows:

yy.y00 - HQ1 Mode

yy.y25 - HQ2 NATO usage

If TSET values are to be entered, perform

yy.y50 - HQ2 non-NATO countries

the following:

Where y is any number 0 to 9. All other

operational NET number combinations

12. HQ2 - Select.

are illegal.

13. TSET - Select.

• Training NET numbers are allocated as

follows:

14. Enter all TSET segments 1 thru 16 (1 thru 6 if

When using WOD segment lists for train-

HQ1).

ing (first segment in a given WOD must

be 300.0xx), NET numbers are 00.z00.

15. TRAINING NET - Enter.

Where z is any number 0 to 4; z specifies

which of the frequencies in the WOD seg-

16. TSET - Deselect.

ments hopping will start on.

When using the TSET segment list for

17. HQ2 - Deselect.

training, NET numbers are 0z.z25. The

suffix of 25 specifies that the TSET fre-

3.47.3 Update WOD or TSET.

quency list in the radio is to be used for

hopping. The z.z is any number 0.0 to 1.5

1. HQ2 - Select.

and designates which of the frequencies

in the list will be used to start hopping.

2. SEG - Select.

COM - Select.

3. Use NEXT WOD or PREVIOUS WOD to index

desired WOD segment list.

HQ2 - Select.

4. UPDATE - Press.

SEG - Select.

WOD number - Enter as necessary.

If TSET frequencies are to be updated, per-

form the following:

Enter all WOD segments 1 through 6.

5. HQ2 - Select.

Use NEXT WOD or PREVIOUS WOD buttons to

6. TSET - Select.

index to next available WOD storage location.

7. TRAINING UPDATE - Press.

Repeat steps 4 through 6 as necessary until all

WOD segments have been entered.

8. TSET - Deselect.

SEG - Deselect.

9. HQ2 - Deselect.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-42

Change 2

TM 1-1520-251-10

3.47.4 Receive TOD Signal.

3.48 ARC-201D SINCGARS PROCEDURES

1. HQ2 - Select.

NOTE

• Selections on the SINC page take 3 to 4

2. TOD RECEIVE - Select, can now receive TOD

seconds to complete in changing the

for the next 60 seconds.

modes of the ARC-201D radio. DO NOT

make a second or subsequent selection

3. HQ2 - Deselect.

until the first selection OPERATION IN

PROGRESS is complete.

3.47.5 Create Emergency TOD.

• In order to use SINCGARS frequency

1. HQ2 - Select.

hopping, the ARC-201D radio must be

loaded with the required hopsets and

2. CALENDAR DAY - Enter.

lockout sets.

• In order to send or receive an ERF, a hop-

3. TOD EMERGENCY - Press.

set must be stored in location 1 in the

ARC-201D radio.

4. HQ2 - Deselect.

•

An ERF procedure (ERF SEND or ERF

3.47.6 Create TOD.

RECEIVE) WILL NOT work correctly if

the MAN and CUE frequencies are the

1. HQ2 - Select.

same and the radio has been tuned to the

MAN frequency; either in SC or FH MAN.

Avoid setting the same frequency for

2. TOD GPS TIME - Press.

MAN and CUE.

3. HQ2 - Deselect.

3.48.1 Automatic Loading of SINCGARS Data.

3.47.7 Send TOD.

NOTE

1. HQ2 - Select.

The DTU will automatically load the initial

power-up, MAN, and CUE frequencies for

2. TOD SEND - Press.

each radio. It WILL NOT load the hopset

and lockout set data. This must be done di-

3. HQ2 - Deselect.

rectly into each radio.

3.47.8 Activation of HAVEQUICK (Frequency Hop-

1. DTU - Select MASTER LOAD.

ping).

2. DTU DATA COMMUNICATIONS - Select ALL.

1. Automatic load HQ data (para 3.47.1).

3.48.2 Manual Loading of SINCGARS Data.

1. COM - Select.

2. Manual load HQ data (para 3.47.2).

2. SINC - Select.

3. Update WOD or TSET segments in radio (para

3.47.3).

3. RADIO - Select FM1 or FM2 as desired.

4. Radio has TOD - Verify.

4. MAN frequency - Enter.

5. COM UTIL - Select.

5. CUE frequency - Enter.

6. HQ MODE - Select FH.

6. HOPSET - Select to verify loaded hopsets.

7. COM UTIL - Deselect.

7. HOPSET - Deselect.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-43

TM 1-1520-251-10

8. Repeat steps 3 through 7 for other FM radio, as

9. SINC - Deselect.

desired.

3.48.4 ERF Send.

9. SINC - Deselect.

SINC - Select.

3.48.3

Set Base Time-of-Day (TOD)/NET (Hopset)

Synchronization.

Automatic Loading of SINCGARS data

(para 3.48.1).

NOTE

• To ensure all aircraft will use approxi-

mately the same TOD within ± 4 seconds,

Manual Loading of SINCGARS Data

select the CLOCK GPS TIME button.

(para 3.48.2).

Other methods are permissible but may

require more detailed coordination; any

RADIO - Select FM1 or FM2 as desired.

method used must ensure that the base

TOD is within ± 4 seconds.

HOPSET - Select MAN.

• The base TOD only needs to be set once,

but the ERF SEND/RECEIVE procedure

SINC 1 or 2 MODE - Select FH/M.

for final synchronization must be accom-

plished with each different Net Control

ERF SEND - Select.

Station (Hopset) that will be used.

MODE - Select desired mode, hopset or lock-

• After TOD synchronization, if the

out.

ARC-201D radio battery backup is

installed with good batteries, the radio will

Select desired Hopset or Lockout Set.

hold synchronization for approximately

24 hours after aircraft power is off.

10.

SEND - Select.

SINC - Select.

11.

Repeat steps 8 through 10 as necessary to com-

plete ERF transfer for all hopsets and lockout

RADIO - Select FM1 or FM2 as desired.

sets desired.

GPS TIME - Press.

12.

ERF SEND - Deselect.

13.

SINC - Select.

DATE/TIME - Enter day of month, hour and

3.48.5 ERF Receive.

minutes in 24 hour format.

1. SINC - Select.

If NET (Hopset) Synchronization only is re-

quired, only the following is necessary:

2. RADIO - Select desired FM radio.

5. RADIO - Select FM1 or FM2, if required.

3. HOPSET - Select MAN

6. Execute ERF SEND/ERF RECEIVE procedure,

4. SINC 1 or 2 MODE - Select FH.

as appropriate, to complete synchronization.

5. ERF REC - Select.

7. Repeat step 6, as necessary, for each different

Net Control Station (Hopset) that will be used.

6. MODE - Select desired mode, hopset or lock-

out, as directed.

8. Repeat steps 2 through 7 for other FM radio, as

desired.

7. RECEIVE - Select.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-44

TM 1-1520-251-10

8. If hopset data received - Store in desired stor-

age location.

2. DTU DATA COMMUNICATIONS - Select ALL

or IDM.

9. If lockout set data received - STORE Select.

3.50.2 Manual Loading of IDM NET Data.

10. RECEIVE - Deselect.

1. COM - Select.

11. Repeat steps 8 or 9 as necessary to complete

2. Select desired preset.

ERF transfer for all hopsets and lockout sets de-

sired.

3. NET - Select.

12. ERF REC - Deselect.

4. Select any subscriber location.

13. SINC - Deselect.

5. EDIT - Select.

3.48.6 Activate Frequency Hopping Mode.

6. Enter the following as desired:

1. SINC - Select.

Net Parameters

Subscriber Parameters

UNIT ID

MEMBER CALL SIGN

2. RADIO - Select FM1 or FM2 as desired.

CALL SIGN

MEMBER SUBSCRIBER

3. NET (Hopset) Synchronization (para 3.48.3), -

VHF FREQ

Verify complete.

UHF FREQ

4. HOPSET - Select desired hopset.

FM FREQ

IDM NET

ORIG (Ownship Subscriber ID)

5. SINC 1 or 2 MODE - Select FH or FH/M.

7. EDIT - Deselect.

6. SINC - Deselect.

8. Verify subscriber added/edited is designated in

3.49

COMSEC OPERATION

ZN or TM, as desired.

1. COM UTIL - Select.

NOTE

2. Enter CNV for UHF, FM1 and FM2, as desired.

• A maximum of 15 subscribers/team

members of which 8 can be zone mem-

3. UHF - Select and choose PLAIN or CIPHER, as

bers (including ownship) are allowed in

desired.

any given net.

• Valid subscriber numbers range from

4. FM1 - Select and choose PLAIN or CIPHER, as

0 - 39, A - 3I.

desired0.

9. Repeat steps 6 through 8 as desired for other

5. FM2 - Select and choose PLAIN or CIPHER, as

subscriber data only.

desired.

10. MODEM - Select.

6. COM UTIL - Deselect.

NOTE

3.50

IMPROVED DATA MODEM NET SETUP

Lower baud rates for the IDM may improve

3.50.1 Automatic Loading of IDM NET Data.

long range digital communications.

1. DTU - Select MASTER LOAD.

11. Enter modem parameters as desired.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-45

TM 1-1520-251-10

12. MODEM - Deselect.

13. NET - Deselect.

14. Repeat steps 2 through 13 for additional presets

as desired.

15. Tune desired radio and verify frequency and Net

assignment on UFD.

3.51 TRANSMITTING AIR FORCE APPLICATION

PROGRAM DEVELOPMENT (AFAPD) PROTOCOL

MESSAGES

NOTE

• The Longbow Protocol is sometimes re-

ferred to as the AFAPD protocol.

• RTS must be used to select a radio with a

valid IDM Net before transmission. The

SEND selection will not be displayed if

the selected radio does not have a valid

IDM Net.

• IDM messages capable of being trans-

mitted from the TSD or FCR displays will

only have the SEND selection displayed

if the subscriber(s) have been selected.

Subscriber(s) will only be displayed on

these displays if they have been desig-

nated as zone members.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-46

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3.52 TO TRANSMIT LONGBOW MESSAGES

TYPE OF MESSAGE

MPD SELECTIONS/ACTIONS

TO SEND MESSAGE

RF Target Handover

After FCR scan, on FCR display

Select zone member, then SEND.

select NTS. Select RFHO.

FCR Targets - All

TSD RPT TGT ALL

Select zone member, then SEND.

FCR Targets - Priority

TSD RPT TGT PRI

Select zone member, then SEND.

FCR Targets - Single or Multiple

TSD RPT TGT Cursor select single

Select zone member, then SEND.

or multiple FCR target icons

Shot At - All

TSD RPT BDA ALL

Select zone member, then SEND.

Shot At - Ownship

TSD RPT BDA OWN

Select zone member, then SEND.

Mode MSG to SEND

Shot At - Query

TSD RPT BDA OWN

Select zone member, then SEND.

Mode MSG to RQST

Pres Posn Report

TSD RPT PP

Select zone member, then SEND.

Mode MSG to SEND

Pres Posn Query

TSD RPT PP

Select zone member, then SEND.

Mode MSG to RQST

FARM Report

TSD RPT FARM

Select zone member, then SEND.

Mode MSG to SEND

FARM Query

TSD RPT FARM

Select zone member, then SEND.

Mode MSG to RQST

Single Stored Target/Threat

TSD THRT XMIT

SEND.

Use cursor to select or point data

entry method to select target or

threat

Single Waypoint/Hazard

TSD WPT XMIT

SEND.

Use cursor to select or point data

entry method to select

waypoint/hazard

Single Control Measure

TSD WPT XMIT

SEND.

Use cursor to select or point data

entry method to select control

measure

Zones - Priority Fire

TSD/ ATK ZN PF

SEND.

Zones - No Fire

TSD/ ATK ZN NF

SEND.

Zones - All

TSD/ ATK ZN BOTH

SEND.

Freetext

COM IDM FREETEXT

SEND.

Enter freetext

Waypoints file

COM IDM CURR MISSION

SEND.

WAYPOINTS

Routes file

COM IDM CURR MISSION

SEND.

Select ROUTE ALL, ROUTE

Select ALL, deselect ROUTE

Single route

COM IDM CURR MISSION

SEND.

Select ROUTE, ROUTE Select

desired route, deselect ROUTE

Laser codes

COM IDM CURR MISSION

SEND.

LASER CODES

Comm Data All

COM IDM ALL IDM/CEOI

SEND.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-47

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3.52 TO TRANMIT LONGBOW MESSAGES (contin-

ued)

Control Measures file

COM IDM CURR MISSION

SEND.

CONTROL MEASURES

Boundry/Phase Lines file

COM IDM CURR MISSION

SEND.

LINES

Engagement Areas file

COM IDM CURR MISSION

SEND.

AREAS

Stored Targets/Threats file

COM IDM CURR MISSION

SEND.

TGT/THRT

Current Mission - All

COM IDM CURR MISSION

SEND.

ALL

MISSION 1 - All files

COM IDM MISSION 1

SEND.

MISSION 2 - All files

COM IDM MISSION 2

SEND.

3.53 ATHS - TACFIRE IMPROVED DATA MODEM

12 - 48 (1 - 4 TACFIRE radios) previously received ATHS -

TACFIRE messages. The system also supports the shoot-

er/designator execution of a digital remote HELLFIRE

3.53.1

ATHS - TACFIRE MISSION CAPABIL-

mission and other airborne fire missions specifying rock-

ITIES. The IDM (MD - 1295/A Processor Interface Unit

ets, gun or HELLFIRE direct. The ATHS - TACFIRE sup-

[PIU] processes AFAPD (LONGBOW) and TACFIRE pro-

ports digital artillery fire missions as the Forward Artillery

tocol messages. The AH-64D’s 1553B bus integrated

Aerial Observer (FAAO) and transmits/receives spot situ-

TACFIRE protocol is programmed to continuously receive

ation reports, battle damage assessments, and casualty

and share dynamic data to and from the bus. Data from

reports. Team situational awareness capabilities are en-

the bus is automatically input into many of the data fields

hanced by the ability to track team member Fuel, Ammo,

that comprise the various messages. Received data is

Rockets, and Missile (FARM) status along with the ability

placed on the bus for SP, DP, and WP usage e.g. ATHS -

to track the present position of up to 15 team members per

TACFIRE target grid coordinate translated to 1553B T - 50

query.

target data and remote Hellfire automatic weapon mod-

ing. Specific to the AH - 64D’s TACFIRE integration, the

term ATHS is synonymous with TACFIRE; ATHS - TAC-

3.53.2 PHYSICAL DESCRIPTION. The IDM is com-

FIRE. The original ATHS was a proprietarily limited (TAC-

posed of a single line replaceable unit (LRU) that receives

FIRE only) self contained modem. The IDM, along with its

information via the 1553B bus. Information is received

updated TACFIRE (AIR mode) protocol software, is the

from the DMS, EGI, SP, WP, onboard sensors, Multipur-

successor of the former ATHS modem. The IDM’s TAC-

pose Display’s (MPD), Keyboard Unit (KU) and through

FIRE protocol software is backward compatible with the

the receipt of digital messages. When ATHS is selected,

legacy ATHS, handheld Digital Messaging Device (DMD),

the processed information may be displayed on either of

Forward Entry Device (FED), and the Tactical Fire (TAC-

the PLT’s or CPG’s MPD’s. ATHS - TACFIRE messages

FIRE) computer.

may be transmitted to and from other ATHS - TACFIRE ca-

pable aircraft, artillery TACFIRE/FIST systems, handheld

data message devices (DMD’s), and SINCGARS config-

NOTE

ured AMPS computers. ATHS - TACFIRE formats complex

The Advanced Field Artillery Tactical Data

messages such as artillery fire requests, reports, emer-

System (AFATDS) is the successor of the

gency broadcasts, automatic reporting of status, move-

TACFIRE computer. AFATDS is backward

ment commands, and general free test messages with au-

compatible with the legacy TACFIRE com-

tomatic or manual authentication.

puter and the IDM’s ATHS - TACFIRE (TAC-

FIRE mode) message format.

ATHS - TACFIRE protocol incorporates two modes of op-

eration: 1) AIR (AIRBORNE) NET mode; and 2) TFR

The ATHS - TACFIRE is designed to maintain current mis-

(TACFIRE) NET mode respectively. If an ATHS - TACFIRE

sion status for up to eight active airborne fire missions,

NET is to be used exclusively between ATHS - IDM aircraft

two active artillery fire missions, and two preplanned artil-

then AIR (default) NET mode should be selected. When

lery fire missions. The IDM retains all ATHS - TACFIRE

communications must be established with the artillery,

mission essential data in nonvolatile storage and will store

legacy ATHS, or DMD, then the TFR NET mode should be

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-48

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selected. Differences in message format and capabilities

• ATHS MESSAGE RECEIVED

between the AIR and TFR modes exist.

• ATHS TABLE LOW

ATHS MESSAGE RECEIVED indicates that an ATHS -

TACFIRE message has been received. ATHS TABLE

3.53.3 ATHS - TACFIRE INITIALIZATION.

LOW indicates the authentication tables have less than 20

available lines remaining. ATHS FAIL indicates the IDM’s

NOTE

ATHS - TACFIRE component has failed.

The AH- 64D’s IDM TACFIRE protocol oper-

A total of eight (8) separate sections may be accessed

ates independently from the IDM AFAPD

from the INDEX page. The 8 sections are displayed with

protocol. If problems are ever experienced

associated line-keys, a series of dashes, aligned with

with one IDM protocol, the other protocol will

specific L1 - L4 or R1 - R4 MPD variable action buttons.

usually function normally.

The 8 sections include:

• AIR REQ

The ATHS - TACFIRE system is a legacy method for es-

• ARTY REQ

tablishing TACFIRE NETS, MODEM protocol, BAUD

• MOVEMENT

RATE, etc. Complete functionality for establishing TAC-

FIRE NETS, RETRIES, BAUD RATE, AUTH, BLOCK,

• REPORTS

PREAMBLE, MONITOR, and XMIT RADIO now exists in

• RSVD MSG

the COM system (refer to para 3.27 for more information).

• START

• STATUS

This section still provides a description of the buttons that

• MSGS/FTXT

reside on the ATHS page as well as describe in detail the

procedures to transmit specific TACFIRE messages.

In addition to the 8 line key sections three other unique

buttons are displayed on the index page:

A complete and detailed description of the ATHS - TAC-

• QUICK

FIRE subsystem is described in Technical Bulletin

• SEND

11 - 5895 - 1632 - 10. Refer to Appendix A to obtain the

• HFMSN

complete description of this Technical Bulletin.

The QUICK button provides direct access to various pre-

vious/preset messages. The SEND R5 button is displayed

a. ATHS (INDEX) PAGE. The ATHS - TACFIRE is

on most of the ATHS pages and is only functional when a

either initialized automatically through a DTU load or

destination subscriber data ID bloc is displayed in L1. The

manually through the ATHS top level (INDEX) page

HFMSN button should be selected (boxed) when conduct-

(fig.3-59). An automatic initialization is contingent on a

ing a remote hellfire mission between AH - 64D aircraft.

TACFIRE NET having been constructed on the AMPS and

downloaded to the DTC. The top level ATHS page is ac-

The ATHS - TACFIRE employs a set of ASCII characters

cessed through either the PLT’s or CPG’s top level COM

to denote operator interface functionality of specific fields.

page by selecting the ATHS button. Upon selecting the

An asterisk (*) indicates a current active field. An arrow (>)

ATHS button, the ATHS - TACFIRE page last displayed in

that points away from an associated MPD button indicates

that crew station will be recalled and displayed. Following

that manual KU data entry is allowed. An arrow (<) point-

an aircraft startup, the initial ATHS button selection will al-

ing to the MPD button signifies a new page button. An ar-

ways display the top level ATHS page. The top level ATHS

row pointing upward (^) besides the associated MPD but-

page is also referred to as the INDEX page. Regardless of

ton indicates that selecting the button will cycle through

what specific ATHS page is currently displayed, selecting

alternative fields. A double pound sign (##) indicates a nu-

the INDEX button will command the INDEX page (top lev-

meric entry button. A double ampersand sign (@@) indi-

el ATHS page) to display.

cates alpha character entry button.

NOTE

The ATHS top level page reserves the data area beneath

the last two line keys for ATHS - TACFIRE specific caution/

The UFD will display an ATHS MSG adviso-

advisories. ATHS top level page caution/advisories in-

ry whenever the IDM receives an ATHS -

clude:

TACFIRE message.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-49

TM 1-1520-251-10

Mayday Message Summary Page.

Quick Menu Page.

c. START PAGES - DESCRIPTION.

NOTE

• ATHS - TACFIRE NETS are commonly

constructed using the AMPS during pre -

mission planning. When an AMPS is not

used, ATHS-TACFIRE NETS can be

constructed through the COM NET edit

pages.

• An ATHS-TACFIRE NET established

solely through the AH - 64D’s COM NET

edit pages will not support the Auto Ac-

knowledge selection.

• The zeroize line-key button does not

clear AFAPD messages or communica-

LBA5005

tion NETS.

The START pages (fig 3-60) are also available to manual-

Figure 3-59. ATHS - TACFIRE INDEX

ly initialize the IDM’s ATHS - TACFIRE functionality. The

pages maintain the files for communication, location, GO/

b. QUICK BUTTON FUNCTION. The QUICK but-

NO GO test, time, and authentication. Communication

ton appears on every ATHS - TACFIRE page. The QUICK

subscriber identifiers are entered as ORIGIN (ORIG),

function provides direct access to any one of the following

TEAM (TM), and BROADCAST (BC). Additionally, a ZER-

five operational ATHS - TACFIRE pages.

OIZE line - key button is provided in the START pages.

This ZEROIZE line - key button clears all data and table

Summary Page of Highest Priority Received Message.

entries from the IDM’s ATHS - TACFIRE component. The

START pages also include six message preset selections,

Airborne Mission Summary Page.

six movement preset selections, and a bulk data load

Artillery Mission Summary Page.

send/receive message capability.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-50

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3.53.4 AIR REQUEST PAGES.

mission list is accomplished by pressing the paging (up-

per right) button on the MPD. Accessing a stored Air Mis-

sion Request Summary page is accomplished by pressing

a. Description. The Air Request (AIR REQ) list can

the left button adjacent to desired mission. Complete mis-

store up to eight fire mission requests. The three index

sion information will display. Initiating a new mission re-

pages display observer mission number, type of ord-

quest is accomplished by pressing a NEW key - button of

nance, firing element (LAUNCHER/subscriber) to which

an available mission number on the Air Request list, se-

request was sent, and mission status. This list is for origi-

lecting air mission type, entering the required parameters,

nating mission requests. Incoming new missions are

receiving the summary, and transmitting the data. Refer to

stored in the Received Message file. Stepping through the

figure 3-61 and 3-62.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-52

TM 1-1520-251-10

(2) STORING / SENDING AIR MISSION FIRE

16. On Air Mission Summary page, SEND button -

REQUEST FOR ORDNANCE OTHER THAN REMOTE

Press.

HELLFIRE.

(3) DIGITAL REMOTE HELLFIRE LAUNCHER

1. Locate target - CAQ or KU enter as required.

(L) AND DESIGNATOR (D) MISSION EXECUTION.

NOTE

•

Remote HELLFIRE (REMOTE HLFR)

The last CAQ’d (T50 or etc.) will automati-

mission request. The paging required for

cally fill the target location data field. Subse-

a simplified request is depicted in fig

quent target CAQing targets will overwrite

3-62.

the target data.

•

Launcher AUTO SHOT should be set to

ON to enable automatic TOF messaging

2. COM page ATHS button - Press.

from the launcher to designator at trigger

pull.

3. INDEX button - Press as required to display

ATHS - TACFIRE index page.

• The launcher’s HFMSN should be boxed

to enable automatic CPG weapons mod-

4. AIR REQ line - key button - Press.

ing. Selecting the button will box and un-

box HFMSN.

5. Line (1 - 8) - Select mission number on which

mission is to be entered. NEW button - Press.

NOTE

When HFMSN is boxed T51 it will be auto-

6. MSN TYPE - Press appropriate button.

matically populated with the coordinate data

from the Hellfire message. T51 target data

7. As pages sequence, press appropriate button.

will be overwritten with the last CAQ’d target

when the operator toggles the HFSM but-

8. Air Mission Summary page - Review and

ton.

change parameters as required.

•

Set FAT on STATUS page to insure valid

TOF message. FAT is not integrated with

To execute a fire request, perform steps 9 and 10.

the 1553B bus.

9. On Air Mission Summary page, SEND button -

• The Mission Status will change from RE-

Press.

QUESTED to ACCEPTED, READY,

FIRE, and SHOT. At completion of mis-

10. ATHS button - Press and repeat steps 1 through

sion an END OF MISSION message

8 above for each net as required.

should be sent.

To recall and send a stored mission, perform steps

(D) ATHS - Select.

11 through 14.

(D) INDEX - Select as required.

11. INDEX button - Press as required to display

(D) AIR REQ - Select.

ATHS - TACFIRE index page.

(D) NEW (as desired) - Select next available air

12. AIR REQ line - key button - Press.

mission.

13. Desired mission (1 - 8) line number - Select.

NOTE

14. R1 button - Press to display Air Mission Sum-

There are three pages (3/3) of NEW AIR

mary page.

MSN’s available, select the next available

AIR MSN.

15.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

(D) HELLFIRE - Select.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-55

TM 1-1520-251-10

(D) Locate target - CAQ or KU enter as re-

NOTE

quired.

• The Launcher must verify the LDA and

SEP angle. The LDA is the laser designa-

NOTE

tion angle and is the area in front of the

launching aircraft that the designating air-

The last target CAQ’d (T50 or ect.) will auto-

craft should avoid. This angle is +/ - 30

matically fill the target location data fill. Sub-

degrees of the launchers gun - target line

sequent target CAQing will overwrite the tar-

(software is set to flash at +/-

20 de-

get data.

grees).

• The Separation angle (SEP) is +/ - 60 de-

grees from the target back towards the

7. D) TARGET type - Select and set.

designator aircraft. This is the angle that

the designator should be inside to pre-

(D) ACTIVITY - Select and set

clude a missile miss due to laser angle to

the missile. The SEP angle will flash

when the angle is greater than 60 de-

(D) 1/3 - Select and advance to page 2/3.

grees.

• The launcher must verify that the target is

10.

(D) MST (missile separation time) TRAJ, Code/

within range based upon the environ-

quantity - Set/verify.

mental conditions. The range is set to

flash at ranges greater than 4.0KM. The

bearing to the target is relative to the

NOTE

launcher in this case and the > indicates

the closest direction to turn to the target.

The LDA/SEP L2 on 2/3 should be ignored.

Data will not accurately display on page 2/3

• Range and bearing are displayed appro-

until both the DEST subscriber 3/3 has been

priately for the aircraft location (launcher

entered and valid subscriber data is avai-

and designator).

lable. Valid subscriber data is automatically

provided if a previous situation report was

17.

(L) CMD line - Verify ACCPT is displayed.

received or an ATHS-TACFIRE position

query was performed. Page 3/3 also dis-

18.

(L) SEND - Select and note send/receive advi-

plays the LDA/SEP data bloc.

sory status R1.

19.

(L) - CMD line - Verify that READY is now dis-

11.

(D) Select 2/3 - Advance to page 3/3 and verify

played.

Range/Bearing to TGT.

20.

(L) SEND - Select and not send/receive adviso-

ry status R1.

12.

(D) >DEST - ?? - Select and enter subscriber ID.

21.

(D) - CMD line - Verify that FIRE is now dis-

played.

13.

(D) SEND - Select and note send/receive advi-

sory status R1.

22.

(L) SEND - Select and note send/receive advi-

sory status R1.

14.

(L) ATHS MSG - Receive. Select INDEX page

23.

(L) Missile in constraints, FIRE missile, and

and RCVD MSG buttons.

auto - send or manual send SHOT CMD.

15.

(L) Message buffer address L 2, L3, or L4 - Se-

24.

(D) - Monitor TOF, LASE target at delay time.

lect to open AIR REQ Message.

25.

(L) - FIRE second missile at MST, if required.

16.

(L) LDA/SEP, B/R, Mode, Code, & Qty - Verify

26.

(D) - Monitor TOF, LASE target for second mis-

data.

sile.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-56

TM 1-1520-251-10

27.

(D) - CMD line - Set to EOM.

b. Types of artillery mission requests are as fol-

lows:

28.

(D) - SEND - Select and note send/receive ad-

(1) NEW TGT. Observer defines target type and

visory status R1.

strength.

(2) Known Point (KNPT TGT). The observer de-

NOTE

fines a point which is a location previously identified and

numbered, known both to the requestor and to the artillery

The receipt of the EOM will automatically

FDC. The requestor then provides target type and

mode the CPG’s weapon systems back to

strength.

their previous settings.

(3) QUICK. Requestor enters only a known point.

All other data is known by the artillery FDC.

3.53.5 ARTILLERY REQUEST PAGES.

(4) Preplanned (REQ PPLN). Observer provides

type of fire request (either Final Protective Fire (FPF) or

a. Description. The mission data contained in the

Copperhead (CPHD) guided munitions). Only one FPF

IDM is formatted to be consistent with the TACFIRE Artil-

can be preplanned at a time; however, both preplanned

lery Fire Direction Center (FDC) system and associated

missions can be Copperhead. The requestor then pro-

forward observer digital message devices (DMD). Artillery

vides target position and known point number.

mission command selection is initially entered on the

(5) Copperhead (CPHD). Target position is de-

ARTY MISSION SUMMARY page automatically as REQ.

fined as NEW or Known Point and point number is pro-

Upon receipt of the TACFIRE FDC message - to - observer

vided to the firing element

(MTO), the mission command will automatically change to

FIRE. A READY command will be displayed if the Battery

c. ARTILLERY FIRE REQUESTS.

Computer System (BCS) is online with TACFIRE. Target

position (range and bearing from the helicopter) is auto-

There are three types of artillery fire requests - pre-

matically calculated. By pressing the TGT PSN (target

planned, new, and Copperhead.

position) button, the operator can manually enter the UTM

grid, range, bearing, and altitude of the target on sub-

d. PREPLANNED FIRE REQUESTS.

pages if required. The Artillery Request List stores two ac-

tive artillery missions and two preplanned mission re-

To insert a preplanned fire request, proceed as follows:

quests on the Preplanned Mission List subpage.

Accessing either active mission is accomplished by press-

1. COM page ATHS button - Press .

ing the M1 or M2 button on the ARTY REQ list page. To

review a preplanned mission, pressing the PPLN LIST

2. INDEX button - Press, as required, to display

button on the Preplanned Mission List page will cause the

ATHS - TACFIRE INDEX page.

Preplanned Mission Summary page to display.

3. ARTY REQ line - key button - Press.

NOTE

4. NEW line - key button - Press (On line opposite

mission to be replaced).

In order to store a preplanned mission, a

preplan request must be executed and

5. REQ PPLN button - Press.

stored as a standard artillery preplan re-

6. Mission type - Select either FPF or CPHD as

quest. Then the mission must be inserted

desired.

into preplan list.

NOTE

Initiating a new artillery mission request is accomplished

If KNPT TGT is selected, entry of two - digit

by pressing the NEW line - key button of an available mis-

KNPT number is required.

sion number, selecting artillery mission type, following

prompts through the subpages, reviewing summary page,

7. KNPT TGT or NEW TGT - Select as appropri-

and transmitting data.

ate.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

3-57

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8. ARTY mission summary page will appear -

7. Review mission on summary page and make

Press SEND. Wait for preplanned MTO then

changes as required.

continue.

*>DEST button - Enter SUB, TEAM or BC ad-

9. INDEX button - Press to return to ATHS - TAC-

dress as desired through KU.

FIRE index page.

9. SEND button - Press.

10. ARTY REQ line - key button - Press.

f. COPPERHEAD FIRE MISSION - ACTIVE AND

PREPLANNED.

11. PPLN LIST button - Press.

To accomplish a Copperhead fire mission, proceed as fol-

12. P1 or P2 - Press NEW as desired.

lows:

13. L2 - Press on preplan insertion pages.

1. Locate target - CAQ or KU enter as required.

14. Repeat steps 1. through 11. to insert a second

NOTE

preplanned mission.

The last target CAQ’d (T50 or ect.) will auto-

matically fill the target location data fill. Sub-

NOTE

sequent target CAQing will overwrite the tar-

If the PPLN mission is requested as M1, it

get data.

can only be stored as P1.

2. COM page ATHS button - Press as required.

e. NEW ARTILLERY FIRE MISSION REQUEST.

3. INDEX button - Press, as required, to display

To initiate a new fire mission, proceed as follows:

ATHS - TACFIRE INDEX page.

1. Locate target - CAQ or KU enter as required.

4. ARTY REQ line - key button - Press.

5. To accomplish in active mission, M1 or M2 but-

NOTE

ton - Press as desired.

The last target CAQ’d (T50 or ect.) will auto-

matically fill the target location data fill. Sub-

6. CPHD - Press.

sequent target CAQing will overwrite the tar-

get data.

NOTE

If KNPT TGT is selected, entry of two - digit

2. COM page ATHS button - Press as required.

KNPT number is required.

3. INDEX button - Press, as required, to display

7. NEW TGT or KNPT TGT - Select as appropri-

ATHS - TACFIRE INDEX page.

ate.

4. ARTY REQ line - key button - Press.

8. ARTY mission summary page will appear - Re-

view ARTY mission summary page and change

5. NEW button opposite mission (M1 or M2) to be

as required.

replaced - Press.

*>DEST button - Enter SUB, TEAM or BC ad-

6. Mission type - Press applicable button and en-

dress as desired through KU.

ter required parameters on subsequent pages

until all data is inserted.

10. SEND button - Press.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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3.53.6

MOVEMENT COMMAND COMMUNICA-

a. SITUATION/STATUS (SIT/ STATUS). Report

TIONS. The MOVEMENT pages allow position instruc-

Transmission. To transmit observers situation and/or sta-

tions to be transmitted without voice communication. The

tus, proceed as follows:

IDM operator can issue directions to specific or all team

members to MOVE TO, HOLD AT, rendezvous (RDZV) at;

NOTE

or inform team members MOVlNG TO or HLDG AT a loca-

Attached to the situation report, the AH - 64D

tion. The locations can be preset to allow QUICK commu-

will automatically include the ownship’s fuel,

nication. In addition, the MOVEMENT pages allow auto-

AMMO (30 mm), rocket, and missile

matic transmission of current position through MY

(FARM) quantities. No operator input is re-

POSITION button and free text communication through

quired, all FARM data is taken off the 1553B

the OTHER button.

bus.

a. MOVEMENT COMMAND TRANSMISSION.

1. COM page ATHS button - Press as required.

Transmit movement commands as follows:

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

1. COM page ATHS button - Press as required.

3. REPORTS line - key button - Press.

2. INDEX button - Press, as required, to display

4. Activity to report - Press the desired activity but-

ATHS - TACFIRE INDEX page.

ton:

• 1) HOLDING.

3. MOVEMENT line - key button - Press.

•

2) CONT MSN.

4. Appropriate movement type button - Press.

• 3) OBS TGT.

• 4) ENGAGING.

5. Appropriate destination select button - Press.

5. Report summary page - Review and change as

NOTE

required.

Pressing the OTHER button will display

NOTE

freetext message entry page where a manu-

The situation report location data fill is the

al entry can be made using KU.

ownship’s location. Location is automatical-

ly filled from data taken off the 1153B bus.

6. Mission summary page - Review and change as

required.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

7. SEND button - Press.

b. SPOT REPORT TRANSMISSION.

8. SEND button - Press.

To transmit a spot report, proceed as follows (fig. 3-61):

3.53.7 REPORT COMMUNICATIONS. The REPORTS

pages (fig. 3-60) allow the observer to provide various in-

1. Locate target - CAQ, store or receive as re-

formation to team and net members such as: Situation/

quired.

status (SIT/STATUS) which reports the observers own sit-

uation, SPOT which reports target activity, ATI or provide

NOTE

intelligence reports to artillery units, BDA to report battle

damage assessments, CAS to report casualty assess-

The last target CAQ’d (T50 or ect.) will auto-

ments, NEG SPOT, and REQUEST to request a report

matically fill the target location data fill. Only

from another subscriber.

one location data fill is available.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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2. COM page ATHS button - Press as required.

5. BDA summary page - Press appropriate button

and manually enter information using KU.

3. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

NOTE

The last target CAQ’d (T50 or ect.) will auto-

4. REPORTS line - key button - Press.

matically fill the target location data fill.

5. SPOT button - Press.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

NOTE

7. SEND button - Press.

Three different target types may be entered

for each SPOT report.

d. CASUALTY (CAS) REPORT TRANSMISSION.

TARGET type - Press appropriate button.

To provide casualty reports, proceed as follows:

Target strength (STR) - Press appropriate but-

1. COM page ATHS button - Press as required.

ton.

2. INDEX button - Press, as required, to display

R1 button - Press.

ATHS - TACFIRE INDEX page.

ALT button - Press as desired.

3. REPORT line - key button - Press.

10.

Target (TGT) ACTIVITY - Select as desired. If

4. BDA/CAS button - Press.

MOVING is selected, proceed to step 10. If STA-

TIONARY is selected, proceed to step 11.

5. CAS summary page - Press appropriate button

and manually enter information using KU.

11.

Target direction - Press appropriate button.

NOTE

12.

R1 button - Press.

The last target CAQ’d (T50 or ect.) will auto-

matically fill the target location data fill.

13.

Mission summary page - Review and change as

required.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

14.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

7. SEND button - Press.

e. ARTILLERY INTELLIGENCE REPORT (ATI)

15.

SEND button - Press.

TRANSMISSIONS.

c. BATTLE DAMAGE ASSESSMENT (BDA) RE-

To transmit an artillery intelligence (ATI) report, proceed

PORT TRANSMISSION.

as follows:

To provide battle damage assessments, proceed as fol-

1. COM page ATHS button - Press as required.

lows:

2. INDEX button - Press, as required, to display

1. COM page ATHS button - Press as required.

ATHS - TACFIRE INDEX page.

2. INDEX button - Press, as required, to display

3. REPORTS line - key button - Press.

ATHS - TACFIRE INDEX page.

4. ATI button - Press.

3. REPORTS line - key button - Press.

5. REL - Scroll through reliability option until de-

4. BDA/CAS button - Press.

sired option is displayed.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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6. Target type - Press appropriate button.

3.53.8 STATUS PAGES. The STATUS pages (fig. 3-60)

provide a means of maintaining and reviewing the last

7. Target strength - Press appropriate button.

position, fuel, ammunition, rocket, and missile (FARM)

status of subscribers. STATUS pages are automatically

filled each time a subscribers situation report is received.

8. R1 button - Press.

The status pages also maintain the ownship’s dynamic

status. The weapons format will depend on whether the

9. RAD/LGTH, WIDTH, and ATTITUDE buttons -

subscriber is defined in an AIR NET or a TACFIRE NET.

Press as appropriate.

The subscriber pages will be automatically updated upon

receipt of a situation/status report.

10. R1 button - Press.

NOTE

11. ATl summary page - Review and change as re-

quired.

All ownship FARM data is automatically tak-

en from the 1553B bus. There is no need to

NOTE

input or edit ownship data.

The last target CAQ’d (T50 or ect.) will auto-

a. OWN STATUS.

matically fill the target location data fill.

To review own status, proceed as follows:

12.

*>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

1. COM page ATHS button - Press as required.

13. SEND button - Press.

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

f. REPORT REQUESTING FROM ANOTHER SUB-

SCRIBER.

3. STATUS line - key button - Press.

To request a report from another subscriber, proceed as

4. OWN WPNS or OWN PPSN button - Press as

follows:

desired.

5. For OWN WPNS entry, laser designator code -

COM page ATHS button - Press as required.

Enter using KU and press paging select button

(1/1) to return to status index page.

INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

OWN PPSN ENTRY.

REPORTS line - key button - Press.

1. Present position is continuously updated from

the 1553B bus. If a contingency warrants, PPSN

REQUEST button - Press.

may be manually edited. To change, enter coor-

dinates using KU and UTM button - Press.

On report request select page - Press appropri-

ate button to designate type of report desired.

2. ALT is entered continuously from the 1553B

bus. If a contingency warrants, ALT may be

DEST - button on summary page - Press and

manually edited. ALT button - Press. Enter alti-

enter subscriber identifier from which report is

tude in meters or enter N/G.

desired using KU.

3. FUEL is continuously updated from the 1553B

Request report summary page - Review and

bus. If a contingency warrants, FUEL may be

change as required.

manually edited. FUEL button - Press and en-

ter.

“>DEST button - Enter SUB, TEAM or BC ad-

dress as desired through KU.

4. Paging select (1/1) - Press to return to status in-

dex page (fig. 3-60). To obtain the status of a

SEND button - Press to transmit request.

single subscriber, proceed as follows:

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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c. WEAPONS STATUS - ALL SUBSCRIBERS.

e. WEAPONS/PRESENT POSITION STATUS -

SINGLE SUBSCRIBER.

To obtain subscriber weapons status, proceed as follows:

1. COM page ATHS button - Press as required.

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

3. STATUS line - key button - Press.

3. STATUS button - Press.

4. SELECT button - Press.

4. SUBS WPNS button - Press. Review weapons

status of net subscribers as IDM automatically

5. SUB - button - Press. Enter desired subscriber

sequences from the first subscriber in NET 1 to

identifier using KU. Present position page will

the last subscriber in NET 8.

display.

5. Paging button - Press to return to status index

6. Paging button - Press to review weapons sta-

page.

tus.

d. PRESENT POSITION STATUS - ALL SUB-

7. Weapons status paging button - Press to return

SCRIBERS.

to status index page.

To obtain present position information on all net subscrib-

SUBSCRIBER POSITION STATUS.

ers, proceed as follows:

COM page ATHS button - Press as required.

1. COM page ATHS button - Press as required.

INDEX button - Press, as required, to display

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

STATUS line - key button - Press.

3. STATUS line - key button - Press.

POS UPDT button - Press.

4. SUBS PPSN button - Press.

SUBS POSITION button - Press and review.

NOTE

Repeat steps 1 through 3.

• Subscriber status will begin with the first

subscriber in NET 1 and display, in order,

SUBS NET button - Select appropriate NET.

through the last subscriber in NET 8 as

paging button is pressed.

Repeat steps 4 and 5 as desired.

• UTM button can be alternately pressed to

display UTM grid coordinates or range

SUMMARY page - Review and select destina-

and bearing of subscriber status being

tion.

displayed.

10.

*>DEST button - Enter SUB, TEAM or BC ad-

5. If desired, return to status index page by press-

dress as desired through KU.

ing paging button once more after last subscrib-

er status is displayed.

11.

SEND button - Press.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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3.53.9

FREE TEXT/PRESET PAGES. The FREE

7. SEND button - Press to transmit message.

TEXT/PRESET message pages (fig. 3-60) allow the ob-

server to compose and transmit any message up to 36

b. PRESET MESSAGE TRANSMISSION.

characters (two lines) at any time. Also, these pages allow

messages to be composed and stored for subsequent re-

To transmit any of up to six preset messages entered dur-

call and transmission at the appropriate time. The top

ing IDM initialization, proceed as follows:

message page includes a MAYDAY for QUICK MAYDAY

broadcasts, a CHECKFIRE message for a QUICK cease

1. COM page ATHS button - Press as required.

fire broadcast, an authentication synchronization mes-

sage to align the FDC codes to the IDM codes, and cancel

2. INDEX button - Press, as required, to display

checkfire message. The free text and preset messages

ATHS - TACFIRE INDEX page.

contain the same information. The free text/preset mes-

sages are automatically addressed to the team subscriber

3. MSGS/FTXT line - key button - Press.

identifier. the MAYDAY message is addressed to the

broadcast subscriber identifier, and contains the MAYDAY

4. MSG PRESETS button - Press.

message and own present position. The Authentication

Synchronization (AUTH) message is addressed to the

5. Select message to be transmitted by pressing

broadcast subscriber identified in the start pages with

button adjacent to appropriate message num-

whom the automatic authentication is to occur (normally

ber.

TACFIRE). If, after transmission, a NAK is returned, the

tables are out of synchronization. TACFIRE will still get

6. DEST - button - Press and enter subscriber

the message and change tables to match the observers.

identifier.

TACFIRE will call back once synchronization has been ac-

complished.

7. SEND button - Press.

a. FREE TEXT MESSAGE COMPOSITION AND

8. To return to ATHS - TACFIRE index page, IN-

TRANSMISSION.

DEX button - Press.

To compose and transmit a free text message, proceed as

c. CHECKFIRE MESSAGE TRANSMISSION.

follows:

To broadcast a cease fire message to all subscribers, pro-

1. COM page ATHS button - Press as required.

ceed as follows:

2. INDEX button - Press, as required, to display

1. COM page ATHS button - Press as required.

ATHS - TACFIRE INDEX page.

2. INDEX button - Press, as required, to display

3. MSGS/FTXT line - key button - Press.

ATHS - TACFIRE INDEX page.

4. DEST button - Enter subscriber identifier using

3. MSGS/FTXT line - key button - Press.

KU.

4. CHECKFIRE button - Press.

NOTE

When FREE TEXT - TEST is used for com-

5. Broadcast identifier is automatically inserted to

munication check, data is not required.

change: DEST - button - Press and enter identi-

fier. using KU.

5. FREE TEXT button - Press to scroll between

TEST and DATA as required.

6. SEND button - Press.

6. Message - Enter any message up to 36 charac-

7. To return to ATHS - TACFIRE index page, IN-

ters long using KU.

DEX button- Press.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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d. MAYDAY MESSAGE TRANSMISSION.

4. AUTH button - Press.

To broadcast a MAYDAY message, proceed as follows:

5. DEST - button - Press. Enter identifier of sub-

scriber with which automatic authentication is

1. COM page ATHS button - Press as required.

desired.

6. When desired, SEND button - Press.

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

NOTE

3. MSGS/FTXT line - key button - Press.

• If authentication tables between sender

and receiver are not synchronized, a

4. MAYDAY button - Press.

NAK will be returned. Sender should not

retransmit.

5. Present position is automatically filled from the

• Receiver should change table positions

1153B bus. To change present position in UTM

and transmit to original sender with tables

grid, POSITION button - Press. Enter UTM us-

synchronized.

ing KU.

f. CANCEL CHECKFIRE MESSAGE TRANSMlS-

6. Broadcast identifier is automatically inserted to

SION.

change: DEST - button - Press and enter identi-

fier.

To broadcast a cancel checkfire message, proceed as fol-

lows:

7. SEND button - Press.

1. COM page ATHS button - Press as required.

8. To return to ATHS - TACFIRE index page, IN-

DEX button - Press.

2. INDEX button - Press, as required, to display

ATHS - TACFIRE INDEX page.

e. A U T H E N T I C A T I O N SYNCHRONIZATION

TRANSMISSION.

3. MSGS/FTXT line - key button - Press.

To broadcast an Authentication Synchronization transmis-

4. CANCKF button - Press.

sion, proceed as follows:

5. DEST button - Press. Enter identifier of sub-

1. COM page ATHS button - Press as required.

scriber as desired.

2. INDEX button - Press, as required, to display

6. SEND button - Press.

ATHS - TACFIRE INDEX page.

7. To return to ATHS - TACFIRE index page, IN-

3. MSGS/FTXT line - key button - Press.

DEX button - Press.

Use or disclosure of this information is subject to the restriction(s) on the title page of this document.

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HELICOPTER, ATTACK, AH-64D LONGBOW APACHE. TECHNICAL MANUAL (2002) - page 4