TM 1–1520–238–T–3
20–15
20–35 SIGNAL NAME:
DOP DESIRED TRACK (–180/+180 DEGREES)
MEMORY LOCATION: 000473
MEMORY 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,
to
If sixth digit displayed on HOD is 0, and fifth digit is 4, 5, 6, or 7=failure warning
If sixth digit displayed on HOD is 1, and fifth digit is 0, 1, 2, or 3=no computed data and
no failure detected
If sixth digit displayed on HOD is 1, and fifth digit is 4, 5, 6, or 7=minus, south, east,
down, and from
SIGNAL FUNCTION:
Indicates sine/status of Doppler.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with track, go to paragraph 20–36.
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).
20–36 SIGNAL NAME:
DOP DESIRED TRACK
MEMORY LOCATION: 000473
MEMORY DATA BIT(S):
17–16
(BINARY)
CONDITION:
If fifth digit displayed on HOD is 0 or 4=0
If fifth digit displayed on HOD is 1 or 5=1
If fifth digit displayed on HOD is 2 or 6=2
If fifth digit displayed on HOD is 3 or 7=3
SIGNAL FUNCTION:
Indicates hundreds field.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with track, go to paragraph 20–37.
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).
20–37 SIGNAL NAME:
DOP DESIRED TRACK
MEMORY LOCATION: 000473
MEMORY DATA BIT(S):
15–12
(HEX)
CONDITION:
If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 0=0
If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 0=1
If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 1=2
If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 1=3
If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 2=4
If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 2=5
If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 3=6
If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 3=7
If third digit displayed on HOD is 0, 1, 2, or 3, and fourth digit is 4=8
If third digit displayed on HOD is 4, 5, 6, or 7, and fourth digit is 4=9
SIGNAL FUNCTION:
Indicates tens field.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with track, go to paragraph 20–38.
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).
