F16C/D. FLIGHT MANUAL (2002) - page 13

T.O. GR1F16CJ1

1178

Oxygen System Controls and Indicators

(Typical) 

PX II

CONTROL/INDICATOR

POSITION/INDICATION

FUNCTION

1. CABIN PRESS ALT

C DF

050,000 feet

Indicates cockpit pressure altitude

2. OXYGEN REGULATOR

FLOW Indicator

White

Indicates oxygen flow

FLOW Indicator

Black

Indicates no oxygen flow

3. OXYGEN SUPPLY Indica

tor

Oxygen pressure (psi)

Indicates gaseous oxygen pressure at regula

tor in psi

4. Mode Lever

PBG (lever lock)

Provides oxygen supply to mask, helmet

bladder, and vest. Pressure breathing as a

function of g is available

ON

Provides oxygen supply to mask, helmet

bladder, and vest. Pressure breathing as a

function of g is not available

OFF

Turns off oxygen supply

5. Diluter Lever

NORM

Provides regulated mixture of cockpit air and

oxygen as determined by cockpit pressure

altitude

100% O

2

Provides regulated 100 percent oxygen

6. EMER Lever

NORM

Provides normal operation. Positive pressure

is provided if cabin pressure altitude exceeds

28,00032,000 feet

EMER

Provides 100 percent oxygen under positive

pressure. This position is used by the pilot to

test for leaks

TEST MASK

Provides 100 percent oxygen under positive

pressure. This position is used for testing by

life support maintenance

Figure 171.(Sheet 2)

T.O. GR1F16CJ1

1179

Oxygen System Controls and Indicators

(Typical) 

PX II

CONTROL/INDICATOR

POSITION/INDICATION

FUNCTION

7.            LIQUID OXYGEN

C DF

Quantity Indicator

05 liters

Indicates quantity of liquid oxygen

8.            OXY QTY Indicator

Test Switch

C DF

 

OXY QTY

Drives pointer ccw toward 0. As pointer

passes 0.5 liter, OXY LOW caution light

comes on. Light goes off after the switch is

released and the pointer passes 0.5 liter

9. OXY LOW Caution Light

(amber)

On

Indicates oxygen quantity is less than 0.5

liter or system pressure below 42 psi

Figure 171.(Sheet 3)

T.O. GR1F16CJ1

1180

Oxygen Duration 

PX II

OXYGEN DURATION (HOURS)

COCKPIT

PRESSURE

DILUTER

LEVER

INDICATED QUANTITY (LITERS)

PRESSURE

ALTITUDE

(FEET)

LEVER

(POSITION)

5

4

3

2

1

35,000

100%

30.94

24.75

18.56

12.37

6.19

35,000

AND UP

NORM

30.94

24.75

18.56

12.37

6.19

30 000

100%

22.63

18.11

13.58

9.05

4.53

30,000

NORM

23.00

18.40

13.80

9.20

4.60

25,000

100%

17.48

13.98

10.49

6.99

3.50

25,000

NORM

21.72

17.37

13.03

8.69

4.34

20,000

100%

13.19

10.55

7.91

5.28

2.64

20,000

NORM

24.43

19.55

14.66

9.77

4.89

15,000

100%

10.62

8.49

6.37

4.25

2.12

15,000

NORM

29.86

23.89

17.92

11.94

5.97

10,000

100%

8.53

6.83

5.12

3.41

1.71

10,000

NORM

29.86

23.89

17.92

11.94

5.97

NOTES

:

1. Oxygen duration increases as cockpit pressure altitude increases because there is less ambient pressure

acting upon the lungs. Therefore, a smaller quantity of oxygen at altitude expands the lungs to the same

size that they were at sea level.

2. With two people, decrease NORM/100% oxygen duration by 50 percent.
3. Use of PBG may reduce the listed available oxygen times.

Figure 172.

T.O. GR1F16CJ1

1181

S

QUANTITY

INDICATOR

PRESSURE

SWITCH

OXYGEN MASK

HARNESS-

MOUNTED

CONNECTOR

RELIEF VALVE

EMERGENCY OXYGEN BOTTLE

HEAT

EXCHANGER

PILOT TO SEAT

LEGEND:

CHECK VALVE

QUICK DISCONNECT

FILL CONNECTOR

LIQUID OXYGEN

GASEOUS OXYGEN

CAUTION

LIGHT

Oxygen System Schematic (Typical)

OXYGEN REGULATOR PANEL

DR

C DF

FILL/BUILDUP/

VENT VALVE

GR1F-16CJ-1-0074A37

C

DF

ELECTRICAL

ON VALVE WITH

EMERGENCY OXYGEN

GREEN RING

EMERGENCY OXYGEN

PRESSURE INDICATOR

OVERBOARD

VENT

VEST FILL/DUMP

VALVE

VEST

CONNECTOR

HELMET

BLADDER

CONNECTOR

PRESSURE SIGNAL

FROM ANTI-G VALVE

5-LITER

LIQUID

OXYGEN

RSVR

PRESSURE

CLOSING

VALVE

BUILDUP COIL

LOX CONVERTER (REMOVABLE)

SUPPLY

VENT

PRESSURE RELIEF VALVE

(FUNCTIONAL WHEN VEST

IS NOT CONNECTED)

OXY

LOW

SEAT TO

AIRCRAFT

PX II

Figure 173.

T.O. GR1F16CJ1

1182

COMMUNICATIONS, NAVIGATION,

AND IFF (CNI) EQUIPMENT

Cockpit controls for CNI equipment are divided

between control units on the consoles and the upfront

controls located on the instrument panel. Controls for

less frequently used functions, such as power and

audio volume, and essential functions, such as

communications backup and guard, are located on

console panels. Controls for frequently used functions

of CNI are located on the upfront controls to permit

headup control during flight.

UPFRONT CONTROLS

Refer to figure 174. The upfront controls provide a

simplified, centralized, headup means of controlling

the most frequently used functions of the communica

tions system, navigation systems, and IFF. The

upfront control set consists of the data entry display

(DED), 

C

 

DF

 the integrated control panel (ICP), and

DR

 the integrated keyboard panel (IKP). The upfront

controls are powered by emergency dc bus No.2 and

emergency ac bus No. 2. Refer to F16D AIRCRAFT,

this section, for supplementary 

D

 information.

DED/CNI READOUTS

Refer to figure 174, 175, and 176. The DED is an

integral part of the upfront controls and provides a

visual display of the switch actions made via upfront

controls. The primary readouts of communication,

navigation, and IFF systems are included in the page

selections available for display on the DED. Channel,

frequency, mode, and code selections of UHF, VHF,

TACAN, ILS and IFF are presented when the

appropriate page is selected. Present position and

steerpoint data may be selected for display on the

DED.

Displays for UHF, TACAN, and IFF show the word

BACKUP when the 

PX II

 CNI, 

PX III

 C & I knob is in

BACKUP. The word GUARD appears on UHF and

VHF pages when guard is selected.

GR1F-16CJ-1-0075X37

DATA ENTRY

DISPLAY (DED)

INTEGRATED

CONTROL

PANEL (ICP)

INTEGRATED

KEYBOARD

PANEL (IKP)

COM 1 (UHF) Override Button

COM 2 (VHF) Override Button

IFF Override Button

ENTR Button

M-SEL Button

Data Control Switch (DCS)

Increment/Decrement Switch

T-ILS Function Button

1

2

3

6

7

9

10

11

1

2

3

6

7

9

10

11

Upfront Controls (Typical)

C DF

DR

1.

2.

3.

6.

7.

9.

10.

11.

WARN RESET Switch

8.

8

4

5

5

LIST Override Button

RCL Button

4.

5.

4

Figure 174.

T.O. GR1F16CJ1

1183

GR1F-16CJ-1-0076A37

Backup or Guard Pages (Typical)

COM

1

COM

2

T-ILS

1

UHF

M1

VHF

10

UHF

MAIN

10

235.00

PRE

226.00

10

NB

VHF ON

12

135.00

PRE

126.00

12

CHAN   24    FRQ

BAND  X (0) CRS

CMD STRG

TCN  T/R

ILS ON

IFF
M1

M2 1432

M3

25
2365

ON

MC

M4

OUT

*

*

MAN

5

6

7

( )

( )

( )

A

UHF

BUP

VHF   12

GRD

M

STPT

BUP

UHF ON

BACKUP

CMD STRG

FRQ

CRS

ON

ILS

TCN ON

BACKUP

IFF ON

BACKUP

IFF

12

34CS 4567

STBY

T123X

*

*

*

*

HAVE QUICK PAGE

NB

*

*

 5

10 : 32 : 47

*

*

VHF ON

AM

GUARD

All 3

Positions

Function

STPT

 5

10 : 32 : 47

CNI Readout/DED Page Summary

IFF

MAN PAGE

IFF
M1

M2

M3

21

1234

ON

MC

M4

AUTO

5

6

( )

( )

A

TIM  2

01:36

POS PAGE

TIM PAGE

10

106.10

205

106.10

TOD

UHF PAGE

COM

1

HQ-TNG

002

12

PRE

123

12

*

*

TOD

TNET

IFF
M1

M2

M3

ON

MC

M4

AUTO

5

( )

POS  1

NOF04

CNI PAGE

VHF PAGE

TCN/ILS PAGE

ALL IFF MODES

M-SEL

0

ENTR

-

RTN

SEQ

RTN

SEQ

DISPLAYED ON INITIAL POWER-UP

Normal Display Pages (Upfront Control)

MS (8)

*

*

*

*

MS

MS (8)

10 235.00

PX II

Figure 175.

T.O. GR1F16CJ1

1184

GR1F-16CJ-1-1076X37

Backup or Guard Pages (Typical)

COM

1

COM

2

T-ILS

1

UHF

M1

VHF

10

UHF

BOTH

10

235.00

PRE

226.00

10

NB

VHF ON

12

135.00

PRE

126.00

12

CHAN   24    FRQ

BAND  X (0) CRS

CMD STRG

TCN  T/R

ILS ON

IFF
M1

M2 1432

M3

25
2365

ON

M4

MC

AUD

*

*

MAN

6

5

7

( )

( )

( )

UHF

BUP

VHF   12

GRD

M

STPT

BUP

UHF ON

BACKUP

CMD STRG

FRQ

CRS

ON

ILS

TCN ON

BACKUP

IFF ON

BACKUP

IFF

12

34CS 4567

STBY

T123X

*

*

*

*

HAVE QUICK PAGE

NB

*

*

 5

10 : 32 : 47

*

*

VHF ON

AM

GUARD

All 3

Positions

Function

STPT

 5

10 : 32 : 47

CNI Readout/DED Page Summary

IFF

MAN PAGE

IFF
M1

M2

M3

21

1234

ON

M4

MC

AUTO

6

( )

B

TIM  4

01:36

POS PAGE

TIM PAGE

10

106.10

205

106.10

TOD

UHF PAGE

COM

1

HQ-TNG

002 TNET

12

PRE

003

11

*

*

TOD

BOTH

IFF
M1

M2

M3

ON

M4

MC

AUTO

5

( )

POS  1

NOF04

CNI PAGE

VHF PAGE

TCN/ILS PAGE

ALL IFF MODES

M-SEL

0

ENTR

-

RTN

SEQ

RTN

SEQ

DISPLAYED ON INITIAL POWER-UP

Normal Display Pages (Upfront Control)

MS (8)

*

*

*

*

MS

MS (8)

10 235.00

PX III

A

Figure 176.

T.O. GR1F16CJ1

1185

The current state of CNI operation is shown on the

DED and is automatically displayed on initial power

up of the upfront controls or may be selected by

positioning the data control switch (DCS) to RTN

momentarily.

CNI Readout/DED Page Summary

The CNI page displays data concerning the UHF

(COM 1), VHF (COM 2), steerpoints, IFF, system

time, and TACAN. The CNI page displays its data on

five lines.

The first line displays information concerning the

UHF radio mode, preset channel or manual

frequency, and current steerpoint number. The label

at the far left indicates the radio mode (either UHF

or HQ). UHF is displayed when the normal mode is

selected; HQ is displayed when the AJ mode is

selected. The UHF/HQ label is highlighted when the

UHF VHF IFF transmit switch is keyed to UHF.

Adjacent to the mode label is the preset UHF

channel, if one is selected. If a preset channel is not

selected, this area contains the manual frequency.

The right side of the first line displays navigation

information. If a steerpoint is selected, STPT is

displayed. If an initial point is selected, IP is

displayed. Adjacent to the steerpoint label is the

number of the current steerpoint. Line one displays

UHF (normal mode), the selected preset UHF

channel (10), and the selected steerpoint (STPT 5).

The left side of the second line displays the status of

the UHF radio and default value indication. During

normal operation, this area is blank. OFF, BUP, and

GRD are other indications of UHF radio status. OFF

is displayed when the power is turned off with the

COMM 1 power knob. When BACKUP or GUARD is

selected, BUP or GRD is displayed. The middle area

of line two is blank during normal operation. If the

upfront controls memory is lost, the upfront controls

revert to default values and DFLT is displayed in the

middle of line two. DFLT is displayed if UFC memory

is lost and the UFC automatically uses default

values. The right side of the second line can display

wind direction and velocity. When the SEQ position

of the DCS is activated, wind direction (referenced to

magnetic north) and velocity, in knots, is displayed.

When the SEQ position of the DCS is again

activated, wind data is blanked. If wind data is

displayed when the CNI page is exited, wind data is

displayed when the CNI page is reentered . Wind

data is not displayed upon UFC powerup.

The third line displays VHF (COM 2) function,

preset channel or manual frequency, and system

time. The left side of line three always displays the

radio mode label VHF. When the UHF VHF IFF

transmit switch is keyed to VHF, the VHF label is

highlighted. Adjacent to the VHF label is the active

preset channel or manual frequency number. The

right side of line three shows VHF, active preset VHF

channel (12), and system time.

The fourth line displays the status of the VHF radio.

A blank area indicates normal operation. OFF

indicates that the power is off, and GRD indicates

that GUARD has been selected. The CNI readout/

DED page summary displays blank for normal

operation. The right side of the fourth line also

displays hack time anytime the stopwatch is

activated.

The fifth line displays IFF and TACAN information.

The area at the far left displays IFF modes selected.

M, which stands for mode, is always displayed; 1, 2,

3/A, 4, C, and S are displayed when the

corresponding mode is selected. When a mode 4 reply

is issued, the 4 is highlighted. The next area of line

five displays the fourdigit code associated with IFF

mode 3/A. The next area displays IFF status. During

normal operation, this area is blank. OFF, STBY,

BUP, and AUTO are other indications of IFF status.

OFF is displayed when the power is turned off with

the IFF MASTER knob. When STANDBY or

BACKUP is selected, STBY or BUP is displayed.

AUTO is displayed when the automatic transponder

switching function of IFF is selected. The right side

displays TACAN channel number and band. TACAN

channel number and band are not displayed when

TACAN radio is off or in backup. The CNI

readout/DED page summary displays IFF modes 1,

3/A, 4, C, and S selected, 4567 (mode 3/A code),

AUTO (automatic transponder switching function),

T123 (TACAN channel number), and X (TACAN

band).

To change preset channels or steerpoint numbers,

the up/down triangles must be next to the item to be

changed. When the DCS is positioned up or down,

the up/down triangles move between the steerpoint

and the UHF and VHF preset channels. With the

up/down triangles next to the desired item, the

steerpoint/channel can be changed by depressing the

increment/decrement switch until the desired

steerpoint or channel is selected. If a manual

frequency is selected, the triangles are displayed but

are not functional. The up/down triangles are

displayed at the steerpoint number during initial

upfront control powerup. UHF, VHF, IFF, TACAN,

and ILS detailed operation using the upfront

controls is described under their respective system.

IFF CONTROL PANEL 

C

 

DF

  

PX III

Refer to figure 177. The IFF control panel, located on

the left console, provides backup control of essential

CNI functions and some primary functions of IFF.

T.O. GR1F16CJ1

1186

GR1F-16CJ-1-2085X37

1

2

3

5

7

1. IFF MASTER Knob

2. IFF M-4 CODE Switch

3. C & I Knob

6. IFF MODE 1/MODE 3 Selector Levers

7. IFF ENABLE Switch

4. IFF MODE 4 MONITOR Switch

5. IFF MODE 4 REPLY Switch

IFF Control Panel

(Typical)

C DF

4

6

Figure 177.

C & I (Communications and IFF) Knob

Functions are:

D

BACKUP - In the event of failure of the upfront

controls, the BACKUP position provides for

alternate operation of the UHF and IFF. BACKUP

may be selected, when desired, even when upfront

controls are functioning.

D

UFC - Provides for normal control of communica

tions, navigation, and IFF primarily via upfront

controls. Refer to UPFRONT CONTROLS, this

section.

IFF MASTER Knob

The IFF MASTER knob functions with the C & I knob

in BACKUP or UFC.

Functions are:

D

OFF - Removes power from the IFF equipment and

zeroizes mode 4 settings unless HOLD function has

been used. The knob must be lifted to position to or

from OFF.

D

STBY - The equipment is turned on and warmed up

but does not transmit.

D

LOW - Same as NORM.

D

NORM - Full range recognition and reply occur.

D

EMER - The knob must be lifted to position to

EMER. When so positioned, an emergencyindicat

ing pulse group is transmitted each time a mode 1,

2, or 3/A interrogation is recognized. IFF replies to

mode S interrogations with an alert consideration.

IFF M4 CODE Switch

The IFF M4 CODE switch has three positions. It is

springloaded to center (A/B) from HOLD and is lever

locked in ZERO position.

Functions are:

D

ZERO - Zeroizes mode 4 settings whenever IFF

MASTER knob is not OFF.

D

A/B - A/B position permits code selection via

upfront controls or via IFF MODE 4 REPLY switch

when C & I knob is in BACKUP.

D

HOLD - Both code settings can be retained after

flight by placing the IFFM4 CODE switch to

HOLD momentarily prior to placing the IFF

MASTER knob to OFF or removing power.

IFF MODE 4 REPLY Switch

The IFF MODE 4 REPLY switch has three positions

and is used when the C & I knob is in BACKUP.

Functions are:

D

OUT - Mode 4 operation is disabled.

D

A - Enables mode 4 and selects the preset code for A.

D

B - Enables mode 4 and selects the preset code for B.

IFF MODE 4 MONITOR Switch

The IFF MODE 4 MONITOR switch permits audio

monitor of mode 4 replies when the C & I knob is in

BACKUP.

Functions are:

D

AUDIO-Monitoring of mode 4 interrogations is

provided by an audio tone on the intercom. An audio

tone of 0 to 1000 Hz is generated when the

transponder is not replying to valid mode 4

interrogations. The frequency of the tone depends on

the number of interrogations received; i.e., the higher

the number of interrogations, the higher the

frequency.

D

OUT - Disables audio monitor from intercom.

T.O. GR1F16CJ1

1187

IFF ENABLE Switch

The IFF ENABLE switch permits mode selection in

BACKUP.

Functions are:

D

M3/MS - Modes 3/A and S enabled in backup.

D

OFF - Modes 1, 3/A, 4 and S disabled in backup.

D

M1/M3 - Modes 1 and 3/A enabled in backup.

IFF MODE 1/MODE 3 Selector Levers

The MODE 1 code selector levers are incremented/de

cremented to select the twodigit code displayed in the

readout windows. The two leftmost windows display

the mode 1 code digits when the C & I knob is in

BACKUP.

The Mode 3/A code selector levers are incremented/

decremented to select the twodigit code displayed in

the readout windows. The two rightmost windows

display the two most significant mode 3/A backup

code digits when the C & I knob is in BACKUP. The

two least significant digits are always set to zero. For

example, if the windows are set to 77, the transmitted

mode 3/A code is 7700.

AUX COMM PANEL 

C

 

DF

 

PX II

Refer to figure 178. The AUX COMM panel, located

on the left console, provides backup control of

essential CNI functions and some primary functions

of IFF.

CNI (Communications, Navigation, and IFF)

Knob

Functions are:

D

BACKUP - In the event of failure of the upfront

controls, the BACKUP position provides for

alternate operation of the UHF, TACAN, and IFF

(mode 4 and EMER functions only). BACKUP may

be selected, when desired, even when upfront

controls are functioning.

D

UFC - Provides for normal control of communica

tions, navigation, and IFF primarily via upfront

controls. Refer to UPFRONT CONTROLS, this

section.

GR1F-16CJ-1-0077X37

1

2

3

5

7

1. IFF MASTER Knob

2. M-4 CODE Switch

3. CNI Knob

4. TACAN Function Switch

5. TACAN CHANNEL Selector Levers

6. IFF MODE 4 MONITOR Switch

7. IFF MODE 4 REPLY Switch

AUX COMM Panel

(Typical)

C DF

4

6

Figure 178.

IFF MASTER Knob

The IFF MASTER knob functions with the CNI knob

in BACKUP or UFC.

Functions are:

D

OFF - Removes power from the IFF equipment and

zeroizes mode 4 settings unless HOLD function has

been used. The knob must be pulled outward to

position to OFF from STBY.

D

STBY - The equipment is turned on and warmed up

but does not transmit.

D

LOW or NORM - Full range recognition and reply

occur. Transmitted power from the IFF system is

the same for both the LOW and NORM positions.

D

EMER - The knob must be pulled outward to

position to EMER. When so positioned, an

emergencyindicating pulse group is transmitted

each time a mode 1, 2, 3/A, or S interrogation is

recognized.

M4 CODE Switch

The M4 CODE switch has three positions. It is

springloaded to center (A/B) from HOLD and is lever

locked in ZERO position.

T.O. GR1F16CJ1

1188

Functions are:

D

ZERO - Zeroizes mode 4 settings whenever IFF

MASTER knob is not OFF.

D

A/B - A/B position permits code selection via

upfront controls or via mode 4 REPLY switch when

in BACKUP.

D

HOLD - Both code settings can be retained after

flight by placing the M4 CODE switch to HOLD

momentarily prior to placing the IFF MASTER

knob to OFF or removing power.

IFF MODE 4 REPLY Switch

The IFF MODE 4 REPLY switch has three positions

and is used when the CNI knob is in BACKUP

position.

Functions are:

D

OUT - Mode 4 operation is disabled.

D

A - Enables mode 4 and selects the preset code for A.

D

B - Enables mode 4 and selects the preset code for B.

IFF MODE 4 MONITOR Switch

The IFF MODE 4 MONITOR switch permits audio

monitor of mode 4 replies when in BACKUP.

Functions are:

D

AUDIO-Monitoring of mode 4 interrogations and

replies is provided by an audio tone on the

intercom. An audio tone of 0 to 1000 Hz is

generated when the transponder is not replying to

valid mode 4 interrogations. The frequency of the

tone depends on the number of interrogations

received; i.e., the higher the number of interroga

tions, the higher the frequency. 

D

OUT - Removes audio monitor from intercom.

TACAN Function Switch

The TACAN function switch provides control of

TACAN functions when the CNI knob is in BACKUP

position.

Functions are:

D

T/R - Transmit/receive mode. Same as REC and in

addition, interrogates the TACAN ground station

for DME information; distance (nm) is displayed

in the HSI range indicator (MILES).

D

REC - Receive mode. The system receives signals

which result in a bearing and course deviation

display on the HSI and audio in the headset.

TACAN range indicator (MILES) on HSI is

shuttered.

D

A/A TR - Airtoair transmitreceive mode.

TACAN system interrogates and receives signals

from aircraft having airtoair capability, provid

ing slant range (nm) distance between aircraft

operating 63 TACAN channels apart. (KC10A

also provides bearing information.) Up to five

aircraft can determine distance from a sixth lead

aircraft.

TACAN CHANNEL Selector Levers

Four TACAN CHANNEL selector levers and

readout windows are provided for TACAN opera

tion when the CNI knob is in BACKUP. The TACAN

channel is set into the first three windows. The

fourth window is used to select X or Y band.

AUDIO 1 CONTROL PANEL

Refer to figure 179. The AUDIO 1 control panel

provides control of less frequently used functions of

the communications system. Except as noted,

controls are active regardless of the position of the

CNI knob.

COMM 1 (UHF) Power Knob

The COMM 1 power knob has an OFF position and

a cw arrow pointing to INC. The OFF position

removes power from the UHF radio. Rotating the

knob cw applies power and increases UHF audio

volume.

COMM 1 (UHF) Mode Knob

The COMM 1 mode knob has three positions and

may be depressed in any of the three positions.

Depressing the knob interrupts reception and

transmits a tone signal and TOD for HQ on the

selected frequency.

Functions are:

D

OFF - Disables squelch circuit to permit reception

of a weak signal.

D

SQL - Enables squelch circuit to help reduce

background noise in a normal operation.

D

GD - The main receiver and transmitter are

automatically tuned to the guard frequency and the

guard receiver is disabled. GD position is not

functional with CNI knob in BACKUP.

T.O. GR1F16CJ1

1189

GR1F-16CJ-1-0078X37

C DF

DR

Audio Control Panels (Typical)

1

8

2

7

6

5

12

11

10

9

COMM 1 (UHF) Power Knob

COMM 2 (VHF) Power Knob

SECURE VOICE Knob

MSL Tone Knob

THREAT Tone Knob

TF Tone Knob

COMM 2 (VHF) Mode Knob

COMM 1 (UHF) Mode Knob

HOT MIC CIPHER Switch

ILS Power Knob

TACAN Power Knob

INTERCOM Knob

7.

8.

9.

10.

11.

12.

1.

2.

3.

4.

5.

6.

3

1

8

2

7

6

5

3

12

10

4

4

11

9

Figure 179.

COMM 2 (VHF) Power Knob

The COMM 2 power knob has an OFF position and a

cw arrow pointing to INC. The OFF position removes

power from the VHF radio. Rotating the knob cw

applies power and increases VHF audio volume.

COMM 2 (VHF) Mode Knob

The COMM 2 mode knob has three positions and may

be depressed to transmit a VHF tone in any of the

three positions. The COMM 2 mode knob may not

function during certain failures of the upfront

controls.

Functions are:

D

OFF - Disables squelch circuit to permit reception

of a weak signal.

D

SQL - Enables squelch circuit to help reduce

background noise in normal operation.

D

GD - The main receiver and transmitter are

automatically tuned to the guard frequency.

SECURE VOICE Knob

The SECURE VOICE knob is inoperative.

MSL Tone Knob

The MSL tone knob has a cw arrow pointing to INC.

Rotating the knob cw increases the volume of the tone

from the AIM9 missile being monitored.

TF Tone Knob

The TF tone knob is not functional.

THREAT Tone Knob

The THREAT tone knob has a cw arrow pointing to

INC. CW rotation increases the volume of the TWS

composite tone.

T.O. GR1F16CJ1

1190

AUDIO 2 CONTROL PANEL

Refer to figure 179. The AUDIO 2 control panel

provides control of less frequently used functions of

the communications system. Except as noted,

controls are active regardless of the position of the

CNI knob.

ILS Power Knob

The ILS power knob has an OFF position and a cw

arrow pointing to INC. The OFF position removes

power from the ILS receiver. Rotating the knob cw

applies power and increases the volume of the

localizer identification signal. The ILS may not

function during certain failures of the upfront

controls.

TACAN Power Knob

The TACAN power knob has an OFF position and a cw

arrow pointing to INC. The OFF position removes

power from the TACAN receiver. Rotating the knob

cw applies power and increases volume of the TACAN

station identification signal.

INTERCOM Knob

The INTERCOM knob has a cw arrow pointing to

INC. Rotating the knob increases the volume of the

signals available to the intercom set.

The intercom provides the following functions:

D

Monitoring and volume control of voice communica

tion between pilot and ground crew or between pilot

and tanker boom operator, monitoring and volume

control of AIM9 missile tone, TWS composite audio

tone, and TWS missile launch tone.

D

Monitoring of systems individually volume con

trolled from the audio control panels.

D

Monitoring of fixed volume warning tones (LG and

low speed warning tone, TWS missile launch tone,

and IFF mode 4 audio monitor) and voice messages.

HOT MIC CIPHER Switch

The HOT MIC CIPHER switch is a threeposition

switch.

Functions are:

D

HOT MIC - Activates communication between pilot

and tanker boom operator or ground crew.

Activation of UHF VHF IFF transmit switch on the

throttle will override this function.

D

OFF - Deactivates HOT MIC and CIPHER

functions.

D

CIPHER - Momentary position which limits UHF

and VHF reception to secure voice only. CIPHER is

functional only when operating in secure voice

mode.

ANT SEL PANEL 

C

 

DF

Refer to figure 180. The ANT SEL panel allows

selection of various antennas for optimum transmis

sion and reception of IFF and UHF signals.

IFF ANT SEL Switch 

C

 

DF

The IFF ANT SEL switch is a threeposition switch.

Functions are:

D

UPPER - Upper antenna is used to receive and

reply to interrogation signals.

D

NORM - The system selects the antenna which is

receiving the best signal.

D

LOWER - Lower antenna is used to receive and

reply to interrogation signals.

GR1F-16CJ-1-0079X37

1. IFF ANT SEL Switch

2. UHF ANT SEL Switch

1

2

ANT SEL Panel

(Typical)

C DF

Figure 180.

T.O. GR1F16CJ1

1191

UHF ANT SEL Switch 

C

 

DF

The UHF ANT SEL switch is a threeposition switch.

Functions are:

D

UPPER - Upper antenna is used to receive and

transmit signals.

D

NORM - The antennas cycle between upper and

lower to provide omnidirectional antenna pattern.

D

LOWER - Lower antenna is used to receive and

transmit signals.

COMMUNICATIONS SYSTEM

The aircraft communications system consists of a

HAVE QUICK UHF radio, a VHF radio, and an

intercom set. Communications are controlled by the

upfront controls, two audio control panels, a UHF

radio backup control panel, and an 

PX II

 

AUX COMM

panel, 

PX III

 IFF control panel.

ANTENNA LOCATIONS

Refer to figure 181.

HAVE QUICK (HQ) SYSTEM

The HQ system provides normal and antijamming,

airtoair, and airtoground UHF communication

capability. The usual operating mode for an HQ UHF

radio is in the normal mode where the radio uses 1 of

7000 channels. The antijamming (AJ) mode uses a

frequency hopping scheme to change the channel or

frequency many times per second. Because the

particular frequency used at any instant depends on

the precise time of day (TOD), both participating HQ

UHF radios must have clocks which are synchro

nized. In addition, the HQ UHF radio uses word of

day (WOD) and net number in the AJ mode.

Single Word of Day (WOD)

The WOD entry is normally entered before flight, but

it is possible to enter it in flight. WOD is entered by

using the six preset channels 1520. The WOD

elements are entered with the manual frequency

knobs and the PRESET button. For a new WOD

entry, start at preset channel 15 and enter an element

using the same method as in entering preset

frequencies in the normal mode. Progressively select

the next higher preset channel (1620) and continue

to enter WOD elements into preset memory. A short

tone is heard when the PRESET button is depressed

for channel 20. This tone indicates that the WOD

element for channel 20 was accepted and transferred

to the radio. The WOD is stored in the nonvolatile

preset channel memory until a WOD transfer occurs.

This procedure overwrites preset channels 1520.

Single WOD Transfer

The WOD must be transferred from the nonvolatile

preset channel memory to the volatile WOD memory

for HQ operation. Progressively select the next lower

channel (1915) until a double beep is heard at

channel 15. A double beep indicates that all WOD

elements have been transferred to the volatile

memory.

When the HQ radio is off, the WOD data is not lost,

but is stored in nonvolatile preset memory. When the

radio is initially turned on, the WOD must be

transferred to the volatile memory. To transfer WOD

data to the volatile memory, select preset mode and

repeat the steps described above.

PX III

 Single WOD transfer is done automatically at

power up if the single WOD method was used for

loading.

Multiple Word of Day (MWOD)

MWOD capability allows for up to six WOD's and

dates to be stored at one time into nonvolatile MWOD

memory. If the radio is turned off or power is lost after

entry of MWOD and date codes, the data is not lost;

therefore, the information remains intact until

manually changed. The six most recent WOD's are

retained. If a WOD with a duplicate date is entered,

the new entry takes precedence. After the MWOD

information is entered, the operational date must be

entered so the radio can select the proper WOD. If

power is lost, the operational date is lost and must be

reentered. However, if a TOD is received, the

operational date is automatically entered as part of

the TOD message. To access MWOD load, select

preset mode, enter 220.025 in channel 20, and

depress 

PX II

 PRESET, 

PX III

 LOAD (MLOAD is

displayed) button. Next, select manual mode and load

word of day elements in channels 2015 by 

PX II

depressing the TONE  button, 

PX III

 positioning the

TTONE switch to TONE. After each entry is made,

a tone is heard. After the first WOD is entered, the

corresponding date code is entered by selecting

channel 14. The date code is represented by the

format 3AB.000, where AB equals the day of the

month; e.g., 315.000 indicates the 15th of the month.

Press the 

PX II

 TONE button, 

PX III

 TTONE switch

to complete the date entry.

T.O. GR1F16CJ1

1192

UPPER IFF/UHF

VHF AM

THREAT WARNING

AND ECM

THREAT WARNING

RADAR

UPPER TACAN

THREAT WARNING

THREAT WARNING

LOWER TACAN

MARKER BEACON

RADAR ALTIMETER

GLIDE SLOPE/LOCALIZER

LOWER IFF/UHF

Antenna Locations (Typical)

GR1F-16CJ-1-0080A37

GLOBAL POSITIONING SYSTEM

VHF FM

IFF INTERROGATOR

IFF ARRAY

ECM

ECM

(RIGHT SIDE)

ECM

ECM

Figure 181.

T.O. GR1F16CJ1

Change 11193

A double beep indicates the date code has been

entered. When using MWOD, the current date must be

set into channel 1 prior to receiving TOD or the current

date must be part of the received TOD message.

Without date information, the radio cannot select the

current WOD, and a steady tone results when entering

AJ mode. After entering WOD(s) and/or setting

operational date, select 220.00, preset channel 20, and

depress PRESET button to enter the verify/operate

mode. The UHF radio is inoperative when in any mode

other than verify/operate. MWOD capability can be

determined by selecting 220.000, channel 20 preset

mode, and pressing the 

PX II

 PRESET, 

PX III

 LOAD

(MLOAD is displayed) button. Select channel 19; if

one or two beeps are heard, the radio is not equipped

with MWOD capability. If no beep is heard, the radio

has MWOD capability. Verify a WOD for a particular

date is loaded by selecting channel 20, manual mode,

and by selecting the date to be verified with the

manual frequency knobs. Select CHAN 19, then

CHAN 20. A single beep signifies that a WOD for that

date is present. The single WOD entry procedure

remains valid for radios that are equipped for MWOD

operation. Preset channel 20 is reserved for MWOD

mode selection.

Automatic MWOD Loading 

PX III

The HAVE QUICK II PHASE 2 radio allows

automatic MWOD loading with a KYK13/TSEC fill

device. Insure radio power is on. Lift access door to

reveal FILL connector and insure mode switch on fill

device is in OFF position. Install fill device in FILL

connector and place mode switch on fill device to ON.

Frequency/status display displays FILL. Select

desired channel on fill device and depress LOAD

button. A series of beeps is heard and the

frequency/status display displays WOD OK if WOD is

valid and successfully received. If WOD is invalid or

unsuccessfully received, the frequency/status display

displays BAD. If BAD is displayed, the fill device

must be disconnected and reloaded and the loading

procedure must be repeated. If WOD OK is displayed,

repeat the loading procedure for subsequent

channels.

Insure WOD OK is displayed after each WOD is

loaded. The CHAN display displays CHAN 1.

Operational date may be loaded by positioning the

frequency switches to OP DATE and setting the

TTONE switch to TONE. After all WOD's are loaded,

place mode switch on fill device to OFF and

disconnect FILL connector. Close access door. Radio

returns to previous mode and the frequency/status

display displays previous settings.

TimeofDay (TOD) Transmission

The TOD entry is normally entered before flight, but

it is possible to enter it in flight. It is possible to

transmit timing information in both normal and AJ

modes by momentarily pressing the 

PX II

 TONE

button, 

PX III

 TTONE switch. In the normal mode, a

complete TOD message is transmitted, while in the

AJ mode, only an abbreviated time update is

transmitted. A time transmission allows a time

update if one radio has drifted out of synchronization.

TimeofDay (TOD) Reception 

PX III

The HAVE QUICK radio accepts the first TOD that is

received after power up. When the EGI is first powered

on, the EGI TOD signal will likely not be synchronized

with the GPS constellation universal time coordinated

(UTC) time since 3045 seconds are typically required

for satellite acquisition. To insure that the HAVE

QUICK radio is using a synchronized UTC TOD,

another TOD should be manually received after an

adequate GPS track has been achieved. The best

indication of an adequate GPS track is to access the

NAV STATUS DED page (LIST 4) and verify the

horizontal accuracy status. A GPS HIGH estimated

horizontal accuracy status (or 300 feet if selected

accuracy display format is in feet) should insure that

the EGI TOD signal is synchronized with UTC time.

Alternatively, verify that four satellites are being

tracked by the EGI by confirming that a 4 is displayed

for EGI miscellaneous parameter (EGIM) 200.

TimeofDay (TOD) Reception 

PX II

Reception is possible in both normal and AJ modes.

The radio automatically accepts the first TOD

message received after the radio is turned on.

Subsequent messages are ignored unless the T

position is selected  with  the A32T knob. The radio

then accepts the next TOD update in either normal or

AJ mode, provided the TOD update arrives within 1

minute of the time the T position has been selected.

To receive time in the normal mode, position the

A32T knob to T and return to a normal channel in

either manual or preset mode. To receive a time

update in AJ mode, rotate the A32T knob to the T

position and then back to the A position. A TOD

update (time tick) can now be received on the selected

AJ net for 1 minute.