TB 9-6625-2163-24
(5) Observe peak power meter indication and allow reading to stabilize. If peak
power meter indication is not between -5 and -7 dBm, perform b (1) below.
(6) Set power switch OFF and move jumper from A4TP5 (fig. 2) to A4TP4 (fig. 2).
Set power switch ON again.
(7) Observe peak power meter indication and allow reading to stabilize. If peak
power meter does not indicate between -20 and -22 dBm, perform b (2) and (3) below.
(8) Set power switch OFF and remove jumper from A4TP4 (fig. 2) and A13TP2 (fig. 2).
Set power switch ON again.
(9) Set FUNCTION switch to SELF TEST and verify ACCEPT indicator is on.
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
(2) Set switches as listed in (a) through (c) 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.
Table 5. Transmitter Pulse Characteristics
Test instrument
Radar test set spacing
indication ( s)
MODE
switch settings
Min
Max
Adjustments
b(2)
2
4.8
5.2
b(3)
3/A
7.8
8.2
b(4)
TEST
6.3
6.7
b(5)
C
20.8
21.2
(6) Set ISLS switch to OFF.