TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
7
Connect the thermistor mount and external power meter to the RF OUTPUT JACK.
(cont'd)
Set MODULATION switch to RF OFF and energize sig gen. Set FREQUENCY to 800 MHz. Set ext
power meter to 10 dBm range and energize.
Wait 2 mins. and set MODULATION switch to CW.
Power SET the instrument by turning the POWER SET/AUTO CAL control until the POWER
MONITOR meter points to "0", or SET position.
Turn ATTENUATOR control so that the external power meter registers "0" dBm.
The ATTENUATOR dial registers 0 dBm behind the hairline.
If output power is low, and ATTENUATION control has reached its stop
before attenuator probe can penetrate enough to get 0 dBm power out,
do the following.
WARNING
Exercise extreme care in the execution of the following
procedure since you will be making mechanical
adjustments on an energized unit.
Deenergize test set up but do not
change settings.
Loosen 2 set screws holding
ATTENUATOR probe to its drive
yoke.
Reset sig gen to RF OFF. Add a
10 dBm attenuator pad between
RF OUTPUT & THERMISTOR.
Reenergize set up.
Wait 2 mins and set
MODULATION switch to CW.
Make sure ATTENUATOR control
is fully clockwise during this
procedure.
Advance attenuator probe to-ward
power meter reading and the 10
dB for the attenuator pad exceeds
+10 dBm.
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