mum deviation (maximum de-
mized.
flection to the left) on SWR
meter scale.
17
Repeat 14 through 16 above until
Adjustment of stub does not re-
Defect within tuner no. 1.
Replace tuner no. 1.
stub being tuned does not re-
duce meter excursions any
duce meter needle excursions
further.
any further.
Adjust stub closest to signals
18
Meter deviation Us seduced to one-
Defect within tuner no. 1.
Replace tuner no. 1.
source to reduce meter devi.a-
half o its value.
tion caused by the adjustment
of the sliding short to one-half
of its value.
19
Repeat 14 through 18 above for
Deviation of indication on SWR
Defect within tuner no. 1.
Replace tuner no. 1.
each succeeding stub on tuner
meter of 0.25 db or less.
no. 1 until a movement of the
Poor connection in test setup.
Locate and correct poor
sliding short causes a meter
connection in test setup.
deviation of not more than
0.25 db on the EXPAND scale
of the SWR meter. Secure
tuner no. 1 in this position.
20
Replace sliding short with slid-
Variations of readings on SWR
Poor or improper connection in
Locate and correct poor or im-
ing termination and recheck
meter of 0.75 db or less.
test setup.
proper connection in test
tuner no. 2 stub setting. If
setup.
necessary, readjust tuner no. 2
until meter indicates as de-
scribed in 11 above.
21
With sliding short connected to
SWR meter indicates 0 DB.
Defect within SWR meter.
Refer to SWR meter manual.
test setup, set RANGE-DB
switch to 20 (or other suitable
Poor connection in test setup.
Locate and correct poor connect-
range); set sliding short for
ion in test setup.
maximum deflection to the
right on SWR meter. and ad-
just GAIN and VERNIER
controls for 0 DB indication.
Do not change SWR meter
GAIN, BAND WIDTH, or
FREQ control settings or
BWO power supply SQUARE
WAVE FREQ control setting
during the remainder of this
procedure.
22
Remove sliding short from test
Poor connection in test setup.
Locate and correct poor connect-
setup and replace it with unit
coefficient in db of unit under
ion in test setup.
under test (unknown load)
test.
using suitable adapter(s), if
Defect within unit under test.
Troubleshoot unit under test.
required. If meter needle goes
3-15