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11. INST LT control As desired.
4.31.3 IHADSS Boresight CPG.
OFFSET Boresight not authorized.
1. SIGHT SEL switch HMD or HMD TADS.
2. GS switch - Press.
3. Adjust brightness and contrast.
4. VID SEL switch TADS.
5. SYM BRT control Adjust.
6. IHADSS BRSIT switch On.
7. INTR LT control As Desired.
8. Align HMD reticle with BRU.
9. BRSIT HMD switch Actuate, then release.
10. IEADSS BRSIT switch OFF.
11. INTR LT control As Desired.
Change 3 4-61
CAUTION
TM 1-1520-238-10
4.31.4 TADS Operational Checks - CPG.
The FLIR zoom FOV shall not be activated
for more than 2 minutes of continuous
operation to prevent excessive
raster retention. Permanent
damage may occur if it is engaged for
more than 5 minutes continuously.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
4-62
TADS switch - TADS or FLIR OFF -
(Announce to pilot).
GS switch - Press.
Heads-up and heads-down displays. Adjust
brightness and contrast as desired.
VID SEL switch - TADS.
SIGHT SEL switch - TADS.
Sensor select switch - TV
SLAVE pushbutton - Press. Turret should return
to manual track.
Thumbforce controller - Exercise turret.
Field-of-view select switch - Evaluate various
FOVs.
IAT/MAN pushbutton - Engage image auto
tracker and check for proper function.
Sensor select switch - DVO.
Field-of-view select switch - Evaluate various
FOVs. If scene is not vertical in both FOVs,
perform Pechan Alignment, paragraph 4.31.5.
Sensor select switch - FLIR.
Adjust gain and level for optimum image,
then engage ACM, as desired.
Field-of-view select switch - Evaluate various
FOVs.
IAT/MAN pushbutton - Engage image auto
tracker and check for proper performance.
Polarity reversal - Check, leave in white hot.
18. Sensor select switch - TV or FLIR.
19. 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
upright when viewing through the DVO.
Should alignment be unsuccessful, refer
to TM 9-1270-476-20.
1.
2.
3.
4.
5.
6.
7.
8.
Sensor select switch - DVO.
Field-of-view select switch - N.
TADS turret - Manual control.
BRSIT ENABLE switch - UP.
Left thumbwheel control - Adjust as required
to align horizontal crosshair with horizon.
BRSIT ENABLE switch - CENTER.
Field-of-view select switch - W.
Recheck alignment of crosshair and horizon.
a. If satisfactorily aligned procedure is complete.
Select desired operating mode.
b. If not satisfactorily aligned:
(1)
(2)
(3)
(4)
(5)
BRSIT ENABLE switch - UP.
Adjust right thumbwheel control as
required to align horizontal crosshair
with horizon.
BRSIT ENABLE switch - CENTER.
Field-of-view select switch - N.
Reverify alignment of NFOV. If satisfactory,
procedure is complete. If unsatisfactory,
repeat steps 4 thru 8
above as required. If still unsatisfactory,
see note above.
TM 1-1520-238-10
4.31.6 TADS Manual Servo Drift Null.
1. SLAVE switch - Press and verify dotted
crosshair is present on selected display (HOD
or HDD).
2.
3.
SIGHT SEL switch - TADS.
Verify TADS turret slews to fixed forward
position by observing solid crosshair coming to
center of display and cueing LOS centering on
cueing dot.
4.
5.
SLAVE Switch - Press.
Sensor select switch - TV or FLIR. For greatest
accuracy, use TV.
6.
7.
8.
Field-of-view select switch - N.
Aim reticle at an easily observed object.
BRSIT ENABLE switch - UP, wait 5 seconds
then adjust left and right thumbwheel controls
for drift null.
9. BRSIT ENABLE switch - CENTER.
4.31.7 TADS Boresight.
a.
b.
PLT/GND ORIDE switch - As required.
CPG ARM/SAFE switch - ARM.
Ensure proper laser safety procedures
are followed.
C.
d.
SIGHT SEL switch - TADS.
NOTE
Boresighting of the DTV and FLIR narrow
and zoom fields-of-view occurs independently;
the actual order is not critical.
However, DTV must be boresighted prior
to boresighting the DVO.
e.
f.
BRSIT switch - TADS. Confirm INTERNAL
BORESIGHT message is present.
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