TM 11-6625-2948-14&P
Item
Inspection
Inspect For
Interval
Case and panel
Monthly
Dirt or corrosion; dents, cracks, scratches, or other
physical damage; loose or missing hardware.
Switches and
Loose or missing knobs; defective switch action;
Weekly
loose mounting; bent, broken or loose terminals;
potentiometers
proper detent or snap action;
smooth potentiometer
rotation from stop to stop; cracked, damaged.
Connectors
Monthly
Bent, broken, or corroded pins; damaged threads;
cracked shell; loose or missing hardware.
Panel lamps
Weekly
Cracked or broken lens; missing or defective lamps;
loose or missing hardware; bent, broken or corroded
terminals.
Wiring
Monthly
Frayed, broken, or abraded
insulation; loose
connections; broken wires.
Monthly
Electrical parts
Loose connections or mounting; evidence of over-
broken, blistered or
charred.
Frayed, broken, kinked, or abraded insulation; loose
Cables
Weekly
or missing clamps; broken wires; damaged connectors.
Fuses
Cracked, damaged, or corroded fuse holders and fuses;
Monthly
correct current rating of fuses; fuse holders securely
mounted.
d. Internal Square Wave Modulation Test.
(9) Power level should read 0 dBm 3.0 dB adjusting
t h e power meter range accordingly.
(10) Repeat steps (1) through (9) at -10 dBm and
- 2 0 dBm. Power level should read 2.0 dB.
(3) Set the MODULATION SELECTOR switch to CW
(11)
Repeat steps (1) through (9) for 11.0 GHz.
and the ∆F control to 0. Adjust the POWER SET
control for an indication of CAL on the power monitor
NOTE
meter.
The attenuator is extremely accurate so
that i f t h e o u t p u t a c c u r a c y a t 0 d B m ,
(4) Adjust the ATTENUATOR control for a reading of 0
-10 dBm, an d -20 dBm are all within
dBm on the attenuator dial.
t h e s p e c i f i e d limits, all other values
b e l o w - 2 0 d B m w i l l be correct.
(5) Set the MODULATION SELECTOR switch to EXT