TB 9-6625-2197-40
(7) Adjust radar test set oscilloscope main TRIGGER LEVEL and HORIZONTAL
position controls to place positive leading edge of sync pulse from pulse generator (CH2) on
second graticule line. If waveform (fig. 6, inset K) is not present, adjust radar test set RF
output power level (up or down 1 dB) until waveform is correct.
(8) Observe radar test set oscilloscope display on CH 1. If radar test set oscilloscope
does not display waveform for on freq pulse (fig. 6, inset K), perform b below.
(9) Adjust MAIN FREQ (menu 10) to 1091 MHz. Radar test set scilloscope will
display waveform (fig. 6, inset K) with reduced amplitude; if not, perform b below.
(10) Adjust MAIN FREQ (menu 10) to 1093 MHz. If radar test set oscilloscope does
not display off freq pulse (pulse absent with +5 V level) (fig. 6, inset L), perform b below.
(11) Adjust MAIN FREQ (menu 10) to 1089 MHz. Radar test set ooscilloscope will
display waveform (fig. 6, inset K) with reduced amplitude; if not, perform b below.
(12) Adjust MAIN FREQ (menu 10) to 1087 MHz. If radar test set oscilloscope does
not display off freq pulse (fig. 6, inset L), perform b below.
b. Adjustments
(1) Adjust radar test set MAIN FREQ (menu 10) to 1087 MHz.
(2) Adjust R83 (fig. 13) until pulse has just appeared on radar test set oscilloscope
display.
13. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
a. Performance Check
(1) Set control box PWR switch to OFF and remove battery stick (fig. 1).
(3) Remove power supply cover.
(4) Insert battery stick into TI (fig. 1).
(5) Set control box PWR switch to ON.
(6) Set control box SEQ switch to GND, then to TEST.
(7) Connect multimeter (dc) low (-) probe to control box TJ 35 and high (+) probe to
test jacks listed in table 3. If any multimeter reading is not within the specified limits,
perform b below.