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FM 6-50, MCWP 3-1.6.23 (2) The TERM 2 binding post is used to connect field wire between the gun assembly and the ground binding post on the case assembly. (3) The TERM 3 binding post is used to connect field wire between the gun assembly and the signal binding post
on the case assembly. When the RECALL switch is pressed the display reappears. The display normally stays in the display window for 15 seconds. The display also goes blank when the GDU receives EOM, CEASE LOAD, or CHECKFIRE; and it stays
blank until data for the next mission is received. The display brightness control is used to vary the brightness of the display window data. L-5. CABLES The following cables are provided for connecting the GDU: SCA cable(W35) ( 15 feet long), which provides signal and power connection between the case assembly and the SCA. Cable assembly W33 (3 feet long) or W33A (15 feet long), which provides signal connection between the case assembly and the AN/PRC 68 or AN/PRC 126 radios. L-6. Cable assembly W34 (3 feet long) or W34A (15 feet long), provides power connection between the case assembly and the AN/PRC 68 or AN/PRC 126 radios. BCS - GDU WIRE LINK a. When a unit is not operating with radio, wire is used
to connect the GDU to the BCS. The BCS - GDU digital wire link is sensitive and works best with unspliced wire in good condition. A single poor splice or multiple splices will hamper data transmission. Terminal strip TM- 184 should be used when connecting wire in the BCS - GDU link. The MX-155 has not performed well. A good lithium battery (BA-5590) should be installed if a battery is required. Weak or dead batteries may result in lost data, display problems, and nonacknowledged
messages. The TA-312 field telephone and/or the AN/GRA-39 should always be used on separate wire lines from the BCS - GDU digital data link. Use of this equipment on the same wire line as the BCS - GDU wire link may hamper communications and damage the GDU. The ring voltage on the TA-312 and the AN/GRA-39 can damage the GDU circuitry. L-5 |