TB 9-6625-2089-24
(5) Adjust MEASUREMENT DEMOD VID LEVEL control for a 1-V pulse
indication on CH1 of oscilloscope (A5).
(6) Adjust M1A1R2 (fig. 1) for MEASUREMENT METER indication of 18 dBW (R).
(7) Set variable attenuator No. 2 dial to setting on calibration chart for 45 dB at 1090 MHz.
(8) Adjust MEASUREMENT DEMOD VID LEVEL control for a 1-V pulse
indication on CH1 of oscilloscope.
(9) Adjust M1A1R7 (fig. 1) for MEASUREMENT METER indication of 33 dBW (R).
(10) Repeat b (1) through (9) above until MEASUREMENT METER tracks from 18
to 33 dBW.
NOTE
If MEASUREMENT METER does not track after repeating
(1) through (9) above adjust M1A1R1 (fig. 1) slightly cw or ccw
and repeat b (1) through (9) above.
(11) Set variable attenuator No. 2 dial to setting on calibration chart for 43 dB at
1090 MHz.
(12) Adjust signal generator output for a 0-dBm reference on peak power meter.
(13) Adjust MEASUREMENT DEMOD VID LEVEL control for a 33 dBW
indication on MEASUREMENT METER.
(14) Adjust AR2C2 (MAIN RF IN/OUT) AR2C8 (AUX RF IN/OUT) for a 1-V pulse
indication on CH1 of oscilloscope (AR2C8 and AR2C2 are located on assembly 45413
151835) (R).
21. RF Input Frequency
a. Performance Check
(1) Connect equipment as shown in figure 10.
(2) Set SIG GEN FUNCTION switch to SWP 20 MHz and MEASUREMENT
FUNCTION SELECT switch to FREQ.
(3) Adjust synthesized signal generator output level and frequency until maximum
amplitude point of pass band, displayed on CH1 of oscilloscope, is aligned with first marker
on oscilloscope CH2 input. Synthesized signal generator will indicate between 1069.4 and
1070.6 MHz.
(4) Repeat (3) above for second through ninth marker. Synthesized signal generator
will indicate as listed in table 10.