TM 11-5840-281-12-1
3-6. OPERATIONAL CHECK. (CONT)
OPERATIONAL CHECKS TABLE (CONT)
ACTION
RESULT
13. On transmitter control
a.
HV ON section of indicator lights.
panel, press OVLD RESET
b.
POWER SUPPLY VOLTS meter indicates 3.4 0.4 kv.
indicator switch and press
c.
POWER SUPPLY CURRENT meter indicates 100 + 10 ma.
HV ON section of HV ON-HV
d.
MAGNETRON CURRENT meter indicates 9.5 + 1 ma.
READY indicator switch.
If any of the above indications are incorrect, refer to
higher category of maintenance.
14. On transmitter control panel
HV ON section of HV ON-HV READY will extinguish and
press HV OFF switch.
HV READY section will light.
WARNING
Be extremely careful to avoid being hit by scanning elevation antenna when
performing step 15.
15. On local control monitor,
place SCAN MODE to fol-
owing positions:
a. NORM position
a. Azimuth antenna scans sector of 30 degrees and eleva-
tion antenna scans 11 degrees in elevation.
b. 350 position
b. Azimuth antenna scans sector of 30 degrees in azimuth
and elevation antenna scans 35 degrees in elevation.
c.
600 position
c.
Azimuth antenna scans sector of 60 degrees in azimuth
and elevation antenna scans 11 degrees in elevation.
d. SIM position
d. Azimuth antenna scans sector of 360 degrees in azimuth
and elevation antenna scans 11 degrees in elevation. If
any of the results obtained above are incorrect, refer
to higher category of maintenance.
16. On receiver-transmitter main
Azimuth and elevation antennas stop scanning.
power panel, place SCAN switch
to OFF position.
17. On local control monitor,
place ANT SERVO control to
following positions:
a.
UP position
a.
Azimuth antenna tilts up to + 25 degree limit and stops.
b.
DOWN position
b.
Azimuth antenna tilts down to - 1 degree limit and stops.
c.
L position
c.
Elevation antenna servos to + 15 degree limit and stops.
d.
R position.
d.
Elevation antenna servos to - 15 degree limit and stops.
If any of the results obtained above are incorrect, refer to
higher category of maintenance.
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