TB 9-6625-2197-40
(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.
12. Receiver Bandwidth
a. Performance Check
(1) Connect equipment as shown in figure 11.
(2) Position pulse generator controls as listed in (a) through (c) below:
(a) 450 ns pulse width.
(b) 25 kHz Frequency.
(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.
(d) Menu 16: SOURCE to LOW PWR and RF to a value that will provide
approximately -21 dBm input to the TI SUM connector (insertion loss of circulator and
cable must be included).
(4) Set radar test set oscilloscope controls for the parameters as listed in (a) through
(e) below:
(a) Autostore to RUN.
(b) TRIGGER SOURCE to 2.
(c) TIME/DIV to 5 s and press MAIN/DELAYED pushbutton for a softkey
menu TIME REF of LFT.
(d) CH1 VOLTS/DIV to 1.0 V.
(e) CH2 VOLTS/DIV to 2.0 V.
(5) Connect radar test set oscilloscope CH1 to TJ 30 on control box.
(6) Set control box PWR switch to ON and RPT switch to GND, then TEST.