TM 11-6625-3053-14
STEP
OPERATION
NORMAL INDICATION
CORRECTIVE ACTION
If alinement ends here:
Replace dust cover (para 6-20).
6
Deenergize sig gen.
Disconnect POWER SET probe from A5 PIN diode attenuator at J2.
Attach an SMA female to type N female adapter to POWER SET cable at P2. Connect the
thermistor mount and external power meter to the type N female end of the adapter.
Set sig gen controls to initial settings of para 2-4 and FREQUENCY to 800 MHz, and ext power meter
to 0 dBm scale.
Energize sig gen and ext power meter.
Wait 2 mins. and set MODULATION switch to CW.
Set the hairline to exact center of window. Aline 50 dBm behind the hairline.
Adjust POWER SET/AUTO CAL control within the range of -55 dBm & -60 dBm against the
stationary ATTENUATOR dial so that:
External power meter reads -7 dBm.
If little or no output obtained, go to
T/S item 5, check 5b. If more
than or less than -7 dBm is
obtained and cannot be adjusted
to -7 dBm on ext power meter,
deenergize sig gen.
Remove Tuning Head Assy (para
Loosen 2 ea 6-32 spline set
screws securing POWER SET
probe to its drive cylinder.
Reenergize sig gen with
MODULATION switch in RF OFF
position.
Wait 2 mins and set MODU-
LATION switch to CW.
6-40