TB 9-6625-2163-24
(3) Adjust A1R8 (fig. 2) until width of pulses is 0.3 s (R).
(4) Adjust A1R1 (fig. 2) until spacing between leading edges of first pulse on CH 1
and CH 2 is 3.6 s (R).
(5) Adjust A1R11 (fig. 2) until width of pulses is 0.3 s (R).
(6) Adjust A1R2 (fig. 2) until leading edge of first pulse on CH 1 and leading edge of
first pulse on CH 2 are spaced 1.8 s (R).
(7) Adjust A1R22 (fig. 2) until width of pulse is 150 s (R).
(8) Adjust RTS Menu 11 RF output to 0 dBm.
(9) Install variable attenuator between RTS Main RF I/O and circulator PORT 1.
Adjust attenuator for 9 dBm indication on peak power meter.
(10) Disconnect RTS output from peak power meter and reconnect to PROBE input.
Set RTS Menu 11 CW selection to OFF.
(11) Adjust A1R43 (fig. 2) until reply video just appears (R).
(12) Repeat steps a (15) through (18).
19. Mode 4 Reply Evaluator
a. Performance Check
NOTE
PUSH TO TEST switch must be pressed and released several
times to observe results.
(1) Connect RTS oscilloscope CH 2 probe to A2TP1 (fig. 2).
(2) Press PUSH TO TEST switch and turn to LOCK position. If width of pulse on
CH2 is not between 267 and 271 s, perform b(1) below.
(3) Disconnect RTS oscilloscope CH1 probe from A1TP3 (fig. 2) and connect to
A2TP2 (fig. 2).
(4) Press oscilloscope AUTO-SCALE pushbutton and set TIME/DIV switch to 5 s.
Position trailing edge of waveform on CH2 to align with second vertical graticule line.
(5) Press PUSH TO TEST switch and turn to LOCK position.
NOTE
The next two tests are performed much easier if the
oscilloscope AUTO-STORE function is used. Press ERASE
after each measurement to clear screen.
(6) Press PUSH TO TEST switch. Pulse will momentarily appear at trailing edge
of pulse on CH 2. If pulse width is not between 11.8 and 12.2 s, perform b (2) below.
(7) Disconnect oscilloscope CH 1 probe from A2TP2 (fig. 2) and connect to A2TP3
(8) Press PUSH TO TEST switch. Negative going pulse will appear on CH 1 each
time PUSH TO TEST switch is pressed and ACCEPT light will glow.
