TM 1–1520–238–T–3
Change 4
14–13
14–47 SIGNAL NAME:
PLT SYM MODE
MEMORY LOCATION: 000654
MEMORY DATA BIT(S):
4–7
(HEX)
CONDITION:
If the sixth digit displayed on HOD is 0 and fifth digit displayed
on HOD is 1=NONE
If the sixth digit displayed on HOD is 0 and fifth digit displayed
on HOD is 2=PLT
If the sixth digit displayed on HOD is 0 and fifth digit displayed
on HOD is 3=CPG
If the sixth digit displayed on HOD is 0 and fifth digit displayed
on HOD is 4=STATUS
SIGNAL FUNCTION:
Selects pilot symbology display.
REMARKS: From FCC to symbol generator.
PASS:
Location of fault if CONDITION corresponds to selected symbology mode: replace symbol
generator (TM 11–1520–238–23–2).
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–48 SIGNAL NAME:
PLT VIDEO MODE
MEMORY LOCATION: 000654
MEMORY DATA BIT(S):
8–11
(HEX)
CONDITION:
If fourth digit displayed on HOD is 0 and third digit displayed
on HOD is 4 or 5 =TV
If fourth digit displayed on HOD is 1 and third digit displayed
on HOD is 0 or 1 =FLIR
If fourth digit displayed on HOD is 1 and third digit displayed
on HOD is 4 or 5=PNVS
If fourth digit displayed on HOD is 2 and third digit displayed
on HOD is 0 or 1 =REC
If fourth digit displayed on HOD is 2 and third digit displayed
on HOD is 4 or 5 =NOT SELECTED
SIGNAL FUNCTION:
Selects video symbology display inputs.
REMARKS: From FCC to symbol generator.
PASS:
Location of fault if CONDITION corresponds to selected symbology mode: replace symbol
generator (TM 11–1520–238–23–2).
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–1).
14–49 SIGNAL NAME:
RECORD CHANNEL SELECT (ACY) RECORD SEL CTL (ACZ)
MEMORY LOCATION: 000654
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
If the fourth digit displayed on HOD is 0, 2, 4, or 6=CPG
If the fourth digit displayed on HOD is 1, 3, 5, or 7=PLT
SIGNAL FUNCTION:
Selects video channel to be recorded.
REMARKS: From FCC to symbol generator.
PASS:
Location of fault if CONDITION corresponds to selected record channel: replace symbol
generator (TM 11–1520–238–23–2).
FAIL: Location of fault: refer to Chapter 21, paragraph 21–2.
