TM 1–1520–238–T–3
20–5
20–7 SIGNAL NAME:
DOP DRIFT VEL 2
MEMORY LOCATION: 000451 AND 000452
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 drift velocity.
REMARKS: From Doppler through CPG MRTU Type III to FCC.
PASS:
If CONDITION agrees with drift go to paragraph 20–8.
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).
20–8 SIGNAL NAME:
DOP EASTING –99.99/+99.99 KM (0/+99.99)
MEMORY LOCATION: 000453
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 displayed is 4, 5, 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, go to paragraph 20–9.
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).
20–9 SIGNAL NAME:
DOP EASTING
MEMORY LOCATION: 000453
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 heading, go to paragraph 20–10.
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).
