TM 1–1520–238–T–3
14–18
Change 4
14–68 SIGNAL NAME:
CPG I BEAM EL
MEMORY LOCATION: 000665
MEMORY DATA BIT(S):
4–15
(SCALAR)
CONDITION:
Displays CPG I beam azimuth on HOD when rockets are selected on HOD. Monitor
HOD; memory location should indicate negative for down and positive for up. Displays
rocket I beam elevation when rockets are selected.
SIGNAL FUNCTION:
Elevation I beam reference.
REMARKS: From FCC to symbol generator.
PASS:
If CONDITION is met, go to paragraph 14–69.
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–69 SIGNAL NAME:
CPG SOLID HDG CUE CTL (ACY) CPG HDGCUE2 CTL (ACZ)
MEMORY LOCATION: 000666
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Activates CPG heading cue when PNVS or integrated helmet and display sight
system (IHADSS) is the selected pilot LOS.
REMARKS: From FCC to symbol generator.
PASS:
If the first digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 14–70.
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–70 SIGNAL NAME:
CPG SOLID HDG CUE (ACY) CPG HDGCUE1 (ACZ)
MEMORY LOCATION: 000666
MEMORY DATA BIT(S):
4–15
(SCALAR)
CONDITION:
Displays CPG heading sensor on HOD. Monitor HOD; memory location should indicate
negative for 180 to 360 degrees and positive for 000 to 180 degrees.
SIGNAL FUNCTION:
Indicates magnetic direction pilot’s sensor is pointing.
REMARKS: From FCC to symbol generator.
PASS:
Location of fault if CONDITION is met: replace symbol generator (TM 11–1520–238–23–2).
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–71 SIGNAL NAME:
CPG MSL BOX CTL
MEMORY LOCATION: 000667
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Activates CPG missile box.
REMARKS: From FCC to symbol generator.
PASS:
If the first digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 14–72.
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–72 SIGNAL NAME:
CPG MSL BOX LINE TYPE
MEMORY LOCATION: 000667
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
If the second digit displayed on HOD is 0, 1, 2, or 3 and first digit is 4, 5, 6, or
7=DASHED
If the second digit displayed on HOD is 0, 3, 5, or 7 and first digit is 0, 1, 2, or 3=SOLID
SIGNAL FUNCTION:
Indicates when missiles are within constraints.
REMARKS: From FCC to symbol generator.
PASS:
If CONDITION corresponds to correct box line type, go to paragraph 14–73.
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
