DOP BITE 1

DOP DISTANCE TO GO - TM-1-1520-238-T-3_652

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 20–23 20–57 SIGNAL NAME: DOP BITE 1 MEMORY LOCATION: 000511 MEMORY DATA BIT(S): 19–4 (HEX) CONDITION: 125252 should be displayed on HOD. SIGNAL FUNCTION: Monitors Doppler. REMARKS: From Doppler through CPG MRTU Type III to FCC. PASS: If CONDITION has been met, go to paragraph 20–58. FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2). 20–58 SIGNAL NAME: DOP BITE 2 MEMORY LOCATION: 000512 MEMORY DATA BIT(S): 19–4 (HEX) CONDITION: 146314 should be displayed on HOD. SIGNAL FUNCTION: Monitors Doppler. REMARKS: From Doppler through CPG MRTU Type III to FCC. PASS: If CONDITION has been met, go to paragraph 20–59. FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2). 20–59 SIGNAL NAME: DOP BEARING TO DESTINATION MEMORY LOCATION: 000513 MEMORY DATA BIT(S): 18–17 (BINARY) CONDITION: If fifth digit displayed on HOD is 2 or 3=failure warning If fifth digit displayed on HOD is 4 or 5=no computed data and no failure detected If fifth digit displayed on HOD is 6 or 7=minus, south, east, down, from SIGNAL FUNCTION: Indicates sine/status of Doppler. REMARKS: From Doppler through CPG MRTU Type III to FCC. PASS: If CONDITION agrees with bearing, go to paragraph 20–60. FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2). 20–60 SIGNAL NAME: DOP BEARING TO DESTINATION MEMORY LOCATION: 000513 AND 000514 MEMORY DATA BIT(S): 16–4 AND 19–18 (SCALAR) CONDITION: (–180/+180 degrees) SIGNAL FUNCTION: Indicates bearing to destination REMARKS: From Doppler through CPG MRTU Type III to FCC. PASS: Location of fault if CONDITION agrees with bearing, go to paragraph 20–61. FAIL: Location of fault: Doppler, wiring from Doppler to CPG MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).

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