TM 1–1520–238–T–320–1620–38 SIGNAL NAME:DOP DESIRED TRACKMEMORY LOCATION: 000473MEMORY DATA BIT(S):11–8(HEX)CONDITION:If second digit displayed on HOD is 0 or 1, and third digit is 0 or 4=0If second digit displayed on HOD is 2 or 3, and third digit is 0 or 4=1If second digit displayed on HOD is 4 or 5, and third digit is 0 or 4=2If second digit displayed on HOD is 6 or 7, and third digit is 0 or 4=3If second digit displayed on HOD is 0 or 1, and third digit is 2 or 5=4If second digit displayed on HOD is 2 or 3, and third digit is 1 or 5=5If second digit displayed on HOD is 4 or 5, and third digit is 1 or 5=6If second digit displayed on HOD is 6 or 7, and third digit is 1 or 5=7If second digit displayed on HOD is 0 or 1, and third digit is 2 or 6=8If second digit displayed on HOD is 2 or 3, and third digit is 2 or 6=9SIGNAL FUNCTION:Indicates ones field.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with track, go to paragraph 20–39.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).20–39 SIGNAL NAME:DOP DESIRED TRACKMEMORY LOCATION: 000473MEMORY DATA BIT(S):7–4(HEX)CONDITION:If first digit displayed on HOD is 0, and second digit is 0, 2, 4, or 6=0If first digit displayed on HOD is 1, and second digit is 0, 2, 4, or 6=1If first digit displayed on HOD is 2, and second digit is 0, 2, 4, or 6=2If first digit displayed on HOD is 3, and second digit is 0. 2. 4, or 6=3If first digit displayed on HOD is 4, and second digit is 0, 2, 4, or 6=4If first digit displayed on HOD is 5, and second digit is 0, 2, 4, or 6=5If first digit displayed on HOD is 6, and second digit is 0, 2, 4, or 6=6If first digit displayed on HOD is 7, and second digit is 0, 2, 4, or 6=7If first digit displayed on HOD is 0, and second digit is 4, 5, 6, or 7=8If first digit displayed on HOD is 1, and second digit is 1, 3, 5, or 7=9SIGNAL FUNCTION:Indicates tenths field.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with track, go to paragraph 20–47.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).20–40 SIGNAL NAME:DOP SINE ROLLMEMORY LOCATION: 000475MEMORY DATA BIT(S):18–17(BINARY)CONDITION:If sixth digit displayed on HOD is 0 or 1=plus, north, west, up, toIf sixth digit displayed on HOD is 2 or 3=failure warningIf sixth digit displayed on HOD is 4 or 5=no computed data and no failure detectedIf sixth digit displayed on HOD is 6 or 7=minus, south, east, down, fromSIGNAL FUNCTION:Indicates sine/status of Doppler.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with heading, go to paragraph 20–34.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).