TM 1–1520–238–T–320–520–7 SIGNAL NAME:DOP DRIFT VEL 2MEMORY LOCATION: 000451 AND 000452MEMORY DATA BIT(S):16–4 AND 19–18(SCALAR)CONDITION:Monitor HOD, digits 6, 5, 4, 3 and 2 should read 0SIGNAL FUNCTION:Indicates Doppler drift velocity.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with drift go to paragraph 20–8.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).20–8 SIGNAL NAME:DOP EASTING –99.99/+99.99 KM (0/+99.99)MEMORY LOCATION: 000453MEMORY DATA BIT(S):19–18(BINARY)CONDITION:If sixth digit displayed on HOD is 0, and fifth digit is 0, 1, 2, or 3=plus, north, west, up,toIf sixth digit displayed on HOD is 0, and fifth digit is 4, 5, 6, or 7=failure warningIf sixth digit displayed on HOD is 1, and fifth digit is 0, 1, 2, or 3=no computed data andno failure detectedIf sixth digit displayed on HOD is 1, and fifth digit displayed is 4, 5, 6, or 7=minus,south, east, down, fromSIGNAL FUNCTION:Indicates sign/status of Doppler.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with heading, go to paragraph 20–9.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).20–9 SIGNAL NAME:DOP EASTINGMEMORY LOCATION: 000453MEMORY DATA BIT(S):15–12(HEX)CONDITION:If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 0=0If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 0=1If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 1=2If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 1=3If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 2=4If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 2=5If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 3=6If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 3=7If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 4=8If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 4=9SIGNAL FUNCTION:Indicates tens field.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with heading, go to paragraph 20–10.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).