TB 9-6625-340-35
(12) Adjust microwave measurement system output and variable attenuator for a
null indication on TI NULL INDICATOR meter. If power meter does not indicate between
.05 and .15 mW, perform b(3) through (5) below.
(13) Repeat technique of (7) through (9) above, using settings listed in table 4. Power
meter will indicate within limits specified.
Table 4. Input Power
Test instrument
Power meter indications (mW)1
POWER control settings
POWER RANGE
Min
Max
switch settings (mW)
(0 to 1.0 scale)
10
.25
0.20 (2.0)
0.30 (3.0)
10
.50
0.45 (4.5)
0.55 (5.5)
10
.75
0.70 (7.0)
0.80 (8.0)
1Readings
in parenthesis are actual value after adding coupling factor for directional coupler.
(14) Set microwave measurement system MULTIBAND CONTROL UNIT RF
ON/OFF switch to OFF.
(15) Position controls as listed in (a) through (f) below:
(a) POWER RANGE switch to 3.0 MW +5 DBM.
(b) POWER control to 0 on 0 to 3.0 scale.
(c) BIAS-READ switch to BIAS.
(d) BIAS COARSE and FINE controls f or a null indication on TI NULL
INDICATOR meter.
(e) BIAS-READ switch to READ.
(f) POWER control to 3.0 on 0 to 3.0 scale.
(16) Adjust microwave measurement system MULTIBAND CONTROL UNIT RF
ON/OFF switch to ON.
(17) Adjust microwave measurement system output and variable attenuator controls
for a null indication on TI NULL INDICATOR meter. Power meter will indicate between
.285 and .315 m W.
(18) Set microwave measurement system MULTIBAND CONTROL RF ON/OFF
switch to OFF.
(19) Position controls as listed in (a) through (f) below:
8
