TM 1–1520–238–T–320–1020–21 SIGNAL NAME:DOP COS PITCHMEMORY LOCATION: 000461 AND 000462MEMORY DATA BIT(S):16–4 AND 19–18(SCALAR)CONDITION:Monitor HOD: memory location response should indicate a positive if aircraft is in noseup attitude or negative if aircraft is in nose down attitude.SIGNAL FUNCTION:Indicates Doppler cosine pitch.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION has been met, go to paragraph 20–26.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).20–22 SIGNAL NAME:DOP GROUND SPEED –999/+999 KM/HR (0/+500)MEMORY LOCATION: 000463MEMORY 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, upIf 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 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 areas with ground speed go to paragraph 20–23.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).20–23 SIGNAL NAME:DOP GROUND SPEEDMEMORY LOCATION: 000463MEMORY 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 hundreds field.REMARKS: From Doppler through CPG MRTU Type III to FCC.PASS:If CONDITION agrees with ground speed, go to paragraph 20–24.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).