TB 9-6625-2197-50
b. Adjustments
(1) Adjust radar test set RF power output to include insertion loss of circulator and
cable values for a level as close to -24 dBm as possible at TI SUM connector input.
(2) Adjust R67 (fig. 13) until waveform (fig. 6, inset H) is at the just solid point.
(3) Adjust radar test set RF power output to include insertion loss of circulator and
cable values for a level as close to -21 dBm as possible at TI SUM connector input.
(4) Adjust R69 (fig. 13) until waveform (fig. 6, inset I) is at the just solid point.
(5) Adjust radar test set RF power output to include insertion loss of circulator and
cable values for a level as close to - 11 dBm as possible at TI SUM connector input.
(6) Adjust R72 (fig. 13) until waveform (fig. 6, inset J) is at the just solid point.
a. Performance Check
(2) Position pulse generator controls as listed in (a) through (c) below:
(a) 0.45 s pulse width.
(b) 25 kHz rate.
(c) Approximately 5 V positive output level.
(3) Set radar test set GENERAL MENUS menus as listed in (a) through (d) below.
NOTE
All menu choices and selections not listed below are not
applicable and may be turned OFF. This check uses the same
menu setup as for paragraph 11, Receiver Sensitivity, except
RF amplitude. If menus were stored under FUNC 5 they may
be retrieved by pressing FUNC 6 and the location number.
(a) Menu 10: MAIN FREQ to 1090 MHz .
(b) Menu 11: MODULATION to EXT.
(c) Menu 14: 0 TRIGGER to INTERNAL.