TM 1–1520–238–T–3
20–7
20–12 SIGNAL NAME:
DOP EASTING
MEMORY LOCATION: 000454
MEMORY DATA BIT(S):
19–16
(HEX)
CONDITION:
If fifth digit displayed on HOD is 0, and sixth digit is 0=0
If fifth digit displayed on HOD is 1, and sixth digit is 0=1
If fifth digit displayed on HOD is 2, and sixth digit is 0=2
If fifth digit displayed on HOD is 3, and sixth digit is 0=3
If fifth digit displayed on HOD is 4, and sixth digit is 0=4
If fifth digit displayed on HOD is 5, and sixth digit is 0=5
If fifth digit displayed on HOD is 6, and sixth digit is 0=6
If fifth digit displayed on HOD is 7, and sixth digit is 0=7
If fifth digit displayed on HOD is 0, and sixth digit is 1=8
If fifth digit displayed on HOD is 1, and sixth digit is 1=9
SIGNAL FUNCTION:
Indicates hundredths field.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with heading, go to paragraph 20–15.
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).
20–13 SIGNAL NAME:
DOP HEADING VEL
MEMORY LOCATION: 000455
MEMORY DATA BIT(S):
18–17
(BINARY)
CONDITION:
If fifth digit displayed on HOD is 0 or 1=plus, north, west, up, to
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 displayed on HOD is 6 or 7=minus, south, east, down, from
SIGNAL FUNCTION:
Indicates sign/status of Doppler.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with heading velocity, go to paragraph 20–14.
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).
20–14 SIGNAL NAME:
DOP HEADING VEL
MEMORY LOCATION: 000455 AND 000456
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 Doppler heading.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with heading, go to paragraph 20–61.
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).
