TM 1–1520–238–T–3
20–24
20–61 SIGNAL NAME:
DOP NORMAL VELOCITY
MEMORY LOCATION: 000515
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 velocity, go to paragraph 20–62.
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).
20–62 SIGNAL NAME:
DOP NORMAL VELOCITY
MEMORY LOCATION: 000515 AND 000516
MEMORY DATA BIT(S):
16–4 AND 19–18
(SCALAR)
CONDITION:
Monitor HOD; digits 6, 5, 4, 3 and 2 should read 0.
SIGNAL FUNCTION:
Indicates velocity.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with normal velocity, go to paragraph 20–63.
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).
20–63 SIGNAL NAME:
DOP HEADING VEL BCD –999.9/+999.9 KM/HR (–200/+500)
MEMORY LOCATION: 000517
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, 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, from
SIGNAL FUNCTION:
Indicates sine/status of Doppler.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with heading velocity, go to paragraph 20–64.
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).
