TM 1-1520-238-10
4-62
Change 8
4.31.4 TADS Operational Checks - CPG.
CAUTION
The FLIR zoom FOV shall not be acti-
vated for more than 2 minutes of contin-
uous operation to prevent excessive ras-
ter retention. Permanent damage may
occur if it is engaged for more than 5
minutes continuously.
1. TADS switch – TADS or FLIR OFF – (Announce
to pilot).
2. SIGHT SEL switch – TADS.
3. ACQ SEL switch – FXD.
4. GS switch – Press.
5. Heads-up and heads-down displays. Adjust
brightness and contrast as desired.
6. VID SEL switch – TADS.
7. Sensor select switch – TV.
8. SLAVE pushbutton – Press. Turret should return
to manual track.
9. Thumbforce controller – Exercise turret.
10. Field-of-view select switch – Evaluate various
FOVs.
11. IAT/MAN pushbutton – Engage image auto
tracker and check for proper function.
12. Sensor select switch – DVO.
13. Field-of-view select switch – Evaluate various
FOVs. If scene is not vertical in both FOVs, per-
form Pechan Alignment, paragraph 4.31.5.
14. Sensor select switch – FLIR.
15. Adjust gain and level for optimum image, then
engage ACM, as desired.
16. Field-of-view select switch – Evaluate various
FOVs.
17. IAT/MAN pushbutton – Engage image auto
tracker and check for proper performance.
18. Polarity reversal – Check, leave in white hot.
19. Sensor select switch – TV or FLIR.
20. Drift null – If Auto Drift Null does not reduce drift
to desired level, perform Manual Servo Drift
Null, paragraph 4.31.6.
4.31.5 TADS Pechan Alignment.
NOTE
This procedure aligns the voltages used to
erect the Pechan (DVO) lens. It should be
used in order to make the scene appear up-
right when viewing through the DVO.
Should alignment be unsuccessful, refer to
TM 9-1270-476-20.
1. Sensor select switch – DVO.
2. Field-of-view select switch – N.
3. TADS turret – Manual control.
4. BRSIT ENABLE switch – UP.
5. Left thumbwheel control – Adjust as required to
align horizontal crosshair with horizon.
6. BRSIT ENABLE switch – CENTER.
7. Field-of-view select switch – W.
8. Recheck alignment of crosshair and horizon.
a. If satisfactorily aligned procedure is com-
plete. Select desired operating mode.
b. If not satisfactorily aligned:
(1) BRSIT ENABLE switch – UP.
(2) Adjust right thumbwheel control as re-
quired to align horizontal crosshair with
horizon.
(3) BRSIT ENABLE switch – CENTER.
(4) Field-of-view select switch – N.
(5) Reverify alignment of NFOV. If satisfac-
tory, procedure is complete. If unsatis-
factory, repeat steps 4 thru 8 above as
required. If still unsatisfactory, see note
above.
