TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
5
Deenergize sig gen.
(cont'd)
Loosen two 6-32 spline set
screws on underside of cam
hub
holding frequency cam to
cam
shaft.
WARNING
Be careful when working on energized unit.
Set controls to initial settings as in
Set POWER ON and wait 2 mins.
Set MODULATION switch to CW.
reads 1520 MHz.
Carefully move frequency cam
until the centers of cam shaft,
follower, and solid portion all line
up per diagram above.
Tighten spline set screws on cam
hub.
Adjust the output of the klystron mode modulator for a vertical deflection on the scope of about 6 cm.
Adjust the scope hor gain to display the full mode pattern. Adjust PHASE control of Mode Modulator
for single trace.
The mode should be centered as shown in C of Figure 6-10.
Adjust LOW MODE pot R2 to
center mode.
frequency counter.
The two frequencies should agree
within +/- 1 MHz.
Adjust the penetration of the
WARNING
Exercise care not to contact live voltages.
6-35