Step 10. RECEIVE DIGITAL DATA TEST

Step 9. TRANSMIT DIGITAL DATA TEST. Cont

Step 11. RECEIVE FREQUENCY HOP VOICE TEST

TM-11-5820-890-30-4 Ground ICOM Radio Sets: Receiver-Transmitter Radio RT-1523(C)/U (NSN 5895-01-234-8093) Manual
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TM 11-5820-890-30-4 12-23. OPERATIONAL CHECK. Continued Step 9. TRANSMIT DIGITAL DATA TEST. Continued Action Set test adapter: PTT: OFF. Set REF RT and RCU: COMSEC: Set test adapter: PTT: UUT. Set test adapter: PTT: OFF. Disconnect WI cable from RF Signal Generator FM I/O connector and connect to Function Generator MOD OUT connector, Connect unconnected WI cable from Function Generator FCTN OUT connector to RF Signal Generator FM I/O connector. Response Scope is locked-up on CH 1 at same frequency as CH 2. If not, go to chart 35. No response. No response. No response. Step 10. RECEIVE DIGITAL DATA TEST. SET: REF RR TEST ADAPTER: FUNCTlON GENERATOR:. RF SIGNAL GENERATOR: FCTN: REM RESPONSE: 1 TRIGGER: CONT FM DEVIATION: 4 to 5 kHz Action a. Adjust fine frequency control on Function Generator until scope CH 1 is locked-up. b. Disconnect W1 cable from RF Signal Generator FM I/O connector. Response a. Adjustment is successful and scope is locked-up on CH 1 at same frequency as CH 2. If not, go to chart 36. b. No response. 12-39

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