TB 9-6625-2089-24
(4) Set variable attenuator No. 2 dial to setting on calibration chart for 60 dB at
1090 MHz.
MODULATION WIDTH control for 1 to 2 μs, PULSE MODULATION switch to EXT
SYNC and adjust RF OUT for a 1 V pulse indication of on oscilloscope CH1.
(6) Connect equipment as shown in figure 8, CONNECTION B.
(7) Set variable attenuator No. 2 dial to setting on calibration chart for 30 dB at
1090 MHz.
(8) Adjust peak power meter to set reference to top of pulse as viewed on CH2 of
oscilloscope. If peak power meter does not indicate between -3 and -1 dBm, perform b (1)
through (10) below.
(9) Set variable attenuator No. 2 dial to setting on calibration chart for 45 dB at
1090 MHz.
(10) Adjust MEASUREMENT DEMOD VID LEVEL control for MEASUREMENT
METER indication of 33 dBW.
(11) Connect equipment as shown in figure 8, CONNECTION A.
(12) Set signal generator output an indication of 1 V pulse on CH1 oscilloscope.
(13) Connect equipment as show figure 8, CONNECTION B.
(14) Set variable attenuator dial setting on calibration chart for 30 dB at 1090 Hz.
(15) Adjust peak power meter set reference to top of pulse as viewed on CH2 of
oscilloscope. If peak power meter does not indicate between -3 and -1 perform b (1) through
(10) below.
(17) Adjust MEASUREMENT DEMOD VID LEVEL control for MEASUREMENT
METER indication of 18 dBW.
(18) Set variable attenuator No. 2 dial to setting on calibration chart for 28 dB at 1090 MHz.
(19) Repeat (5) above.
(20) Adjust peak power meter (COARSE and FINE) to set reference to top of pulse
as viewed on oscilloscope CH2. If peak power meter does not indicate 0 dBm 1 dBm,
perform b (11) through (14) below.
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