Table 3-6-Continued
Step
Procedure
Normal indication
Possible cause of malfunction
Corrective measure
3
Connect sliding short to tuner
SWR meter indication increases.
Defect within BWO power supply.
Refer to paragraph 3-13 of this
no. 2. Adjust GAIN control on
section.
SWR meter fully cw and ver-
nier control fully ccw. Adjust
Defect within SWR meter.
Refer to SWR meter manual.
SQUARE WAVE FREQ con-
trol on BWO power supply for
maximum SWR meter indica-
tion.
4
Turn all tuning stubs on both tu-
SWR meter indication "peaks".
Defect within tuners.
Replace stub tuner.
ners ccw until they turn
freely. Adjust sliding short for
Defect within sliding short.
Replace sliding short.
maximum deflection to the
right
Poor connection in test setup.
Locate and correct poor con-
nection in test setup.
5
Set RANGE-DB switch on SWR
SWR meter indicates full scale (O
Defective level-set attenuator.
Replace level-set attenuator.
meter to 20, and adjust level-
DB).
set attenuator for full-scale
Defect within SWR meter.
Refer to SWR meter manual.
deflection (O DB) on SWR
meter.
6
Disconnect sliding short and re-
SWR meter indication on-scale.
Defect within SWR meter.
Refer to SWR meter manual.
place it with sliding termina-
tion. A d j u s t RANGE-DB
Defect within sliding termination.
Replace sliding termination.
switch on SWR meter for an
on-scale reading.
7
Adjust sliding termination for
SWR meter indication "peaks".
Defect within sliding termination.
Replace sliding termination.
maximum deflection to the
right on SWR meter scale. If
necessary, change RANGE-DB
switch setting to follow the
maximum.
8
Tune tuner no. 2 (tuner closest
Further tuner stub adjustment has
Defect within tuner no. 2.
Replace tuner no. 2.
to load) by first adjusting stub
no effect on SWR meter indica-
which is closest to load for a
tion.
Poor connection in test setup.
Locate and correct poor connec-
minimum meter deflection
tion in test setup.
(maximum deviation to left)
on SWR meter scale while ad-
justing sliding termination for
maximum deflection on SWR
meter scale. If necessary, turn
RANGE-DB switch cw to fol-
low the minimum meter deflec-
tion. Repeat this step until ad-
justment has no further effect.
3-13