TB 9-6625-2163-35
b. Adjustments
(1) Adjust A16A1C2 (fig. 2) until output power is -6 dBm (R).
(2) Turn TI power OFF. Disconnect jumper from test point A4TP5 (fig. 2) and
connect it to test point A4TP4 (fig. 2). Turn power ON.
(3) Adjust A16R6 (fig. 2) until output power is 21 dBm (R).
17. Transmitter Pulse Characteristics and Challenge
a. Performance Check
(1) Connect equipment as shown in figure 1.
(2) Set switches as listed in (a) through (d) below:
(a) FUNCTION switch to SYSTEM.
(b) MODE switch to 1.
(c) CODE switches to 7777.
(3) Set RTS to INITIAL settings. Select MENU 16 and set PULSE# to 1 and TO
PULSE to 2. Perform a time A to B measurement on the RTS (select SPACING and press
ENTER on keypad). If spacing between first and third pulses (second pulse will be
suppressed) is not between 2.8 and 3.2 s, perform b(1) below.
(4) Repeat technique of (3) above for setting and indications listed in table 5. If
pulse spacing is not within specified tolerance, perform respective adjustment.
(5) Position ISLS switch to ON and observe spacing between leading edge of first
and second pulses. If pulse spacing is not between 1.9 and 2.1 s, perform b(6) below.
Test instrument
Radar test set spacing
MODE
indication (s)
switch settings
Min
Max
Adjustments
2
4.8
5.2
b(2)
3/A
7.8
8.2
b(3)
TEST
6.3
6.7
b(4)
C
20.8
21.2
b(5)
(6) Set ISLS switch to OFF.
(7) Set RTS MENU 16 TO PULSE to 1. Measure width of first pulse (select
PULSE WIDTH and press ENTER on keypad). Measure width of second pulse (change
MENU 16 PULSE# to 2 and TO PULSE to 2, then select WIDTH and press ENTER on
keypad). If width of both pulses is not between 0.7 and 0.9 s perform b(7) below.
(8) Set ISLS switch to ON and verify pulse width of ISLS pulse is between 0.7 and
0.9 s.
16
