SINE AZ TO GUN (ACY) GUN SINE AZ CMD (ACZ)

TM 1–1520–238–T–3 Change 4 5–13 5–41 SIGNAL NAME: SINE AZ TO GUN (ACY) GUN SINE AZ CMD (ACZ) MEMORY LOCATION: 001645 MEMORY DATA BIT(S): 4–19 (ACY) 4–15 (ACZ) (SCALAR) CONDITION: Monitor HOD while slewing gun: memory location response should indicate a negative (sixth digit on the HOD is 1) when the sine azimuth is to the left and a positive (sixth digit on HOD is 0) when sine azimuth is to the right. SIGNAL FUNCTION: Issues LOS azimuth signal (– left/+ right) to gun. REMARKS: From FCC through RH FAB MRTU Type I to GTCB. PASS: If polarity of scalar conversion corresponds to gun position, go to paragraph 5–42. FAIL: Location of fault: refer to sight selected LOS (TADS, PNVS or HMD). 5–42 SIGNAL NAME: COSINE AZ TO GUN (ACY) GUN COS AZ CMD (ACZ) MEMORY LOCATION: 001646 MEMORY DATA BIT(S): 4–19 (ACY) 4–15 (ACZ) (SCALAR) CONDITION: Monitor HOD while slewing gun: memory location response should indicate a negative (sixth digit on the HOD is 1) when the cosine azimuth is to the left and a positive (sixth digit on HOD is 0) when cosine azimuth is to the right. SIGNAL FUNCTION: Issues LOS azimuth signal (– left/+ right) to gun. REMARKS: From FCC through RH FAB MRTU Type I to GTCB. PASS: If CONDITION corresponds to gun position, go to paragraph 5–43. FAIL: Location of fault: refer to sight selected LOS (TADS, PNVS or HMD). 5–43 SIGNAL NAME: EL LEAD TO GUN (ACY) GUN EL LEAD CMD (ACZ) MEMORY LOCATION: 001602 MEMORY DATA BIT(S): 4–19 (ACY) 4–15 (ACZ) (SCALAR) CONDITION: Monitor HOD while slewing gun: memory location response should indicate a negative (sixth digit on the HOD is 1) when the elevation lead angle error is down and a positive (sixth digit on HOD is 0) when elevation lead angle error is up. SIGNAL FUNCTION: Issues elevation lead angle error signal (– down/+ up) to GTCB. REMARKS: From FCC through RH FAB MRTU Type I to GTCB. PASS: If CONDITION corresponds to gun position, go to paragraph 5–44. FAIL: Location of fault: refer to sight selected LOS (TADS, PNVS or HMD). 5–44 SIGNAL NAME: GUN EL ERROR MEMORY LOCATION: 001542 MEMORY DATA BIT(S): 4–19 (ACY) 4–15 (ACZ) (SCALAR) CONDITION: Monitor HOD while slewing gun: memory location response should indicate a negative (sixth digit on the HOD is 1) when the elevation lead angle error is down and a positive (sixth digit on HOD is 0) when elevation lead angle error is up. SIGNAL FUNCTION: Issues elevation error signal (– down/+ up) to FCC. REMARKS: From GTCB through RH FAB MRTU Type I to FCC. PASS: If CONDITION corresponds to gun position, go to paragraph 5–45. FAIL: Location of fault: refer to sight selected LOS (TADS, PNVS or HMD).