TM 1–1520–238–T–3
6–12
Change 4
6–43 SIGNAL NAME:
LOCAL NAV & VEL CAL CMD
MEMORY LOCATION: 002235
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors local navigation bob–up or velocity calibration command.
REMARKS: From FCC through DASEC to HARS.
PASS:
If sixth digit on HOD is 0, go to paragraph 6–44.
FAIL: Location of fault: go to Chapter 20, paragraph 20–77.
6–44 SIGNAL NAME:
HARS VELOCITY CAL ENABLE
MEMORY LOCATION: 002235
MEMORY DATA BIT(S):
17 (ACY) 10 (ACZ)
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors HARS velocity calibration enable.
REMARKS: From FCC through DASEC to HARS.
PASS:
If first digit on HOD is 0, 1, 2, or 3, go to paragraph 6–45.
FAIL: Location of fault: go to Chapter 20, paragraph 20–77.
6–45 SIGNAL NAME:
VEL STATUS TO HARS (ACY) VEL AID VALID (ACZ)
MEMORY LOCATION: 002224
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indication of velocity input status to HARS.
REMARKS: From FCC through DASEC to HARS.
PASS:
If fifth digit on HOD is 0, 1, 2, or 3, go to paragraph 6–46.
FAIL: Location of fault: go to paragraph 6–49.
6–46 SIGNAL NAME:
HARS LONG VEL
MEMORY LOCATION: 002166
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; HARS LONG VEL positive indicates forward movement (HARS LONG
VEL negative indicates aft movement). Small changes on second digit indicate fail.
SIGNAL FUNCTION:
Monitors HARS longitude velocity.
REMARKS: From HARS through DASEC to FCC.
PASS:
If conditions are met, go to paragraph 6–47.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
6–47 SIGNAL NAME:
HARS LONG ACC
MEMORY LOCATION: 002174
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; HARS LONG ACC positive indicates forward movement (HARS LONG
ACC negative indicates aft movement).
SIGNAL FUNCTION:
Monitors HARS longitude acceleration.
REMARKS: From HARS through DASEC to FCC.
PASS:
If conditions are met, go to paragraph 6–48.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
