TB 9-6625-2163-24
NOTE
When visual accuracy of oscilloscopes timing is questionable
(as in the paragraph above and subsequent paragraphs), use
oscilloscope width measurement or cursor function to obtain
required accuracy.
b. Adjustments
(1) Adjust control A11R6 (fig. 2) until pulse width is 0.675 s (R).
(2) Adjust control A11R15 (fig. 2) until pulse width is 0.5 s (R).
12. Comparison Pulse Position
a. Performance Check
(1) Disconnect oscilloscope CH 1 probe from test point A11TP2 (fig. 2) and connect it
to test point A11TP1 (fig. 2).
(2) Connect oscilloscope CH 2 probe to test point A11TP2 (fig. 2).
(3) Set FUNCTION switch to I/P and press PUSH TO TEST switch and turn to
LOCK position.
(4) Set RTS INTERROGATOR Menu 3 REPLY SIGNAL to ID OF POS.
(5) Perform a power measurement on RTS. Stop measurement after reading has
been obtained.
(6) Press oscilloscope AUTO-SCALE pushbutton and set TIME/DIV switch to
and ACCEPT lamp will glow.
(7) Set TIME/DIV switch to 500 ns and adjust HORIZONTAL POSITION control
to reference C1 pulses on CH 1 and CH 2 to center graticule line on display. If pulse on
CH 2 is not centered within pulse on CH 1, perform b (1).
C4
B1
D1
B2
D2
B4
D4
F2
I/P
A2
A4
C1
A1
C2
A11TP1
A11TP2
Figure 3. Comparison pulse position.
(8) Repeat technique of (7) above for each of the following pulses: A1, C2, A2, C4,
A4, B1, D1, B2, D2, B4, D4, F2, and I/P (fig. 3). If pulse positions are not as specified,
perform b (2) below for appropriate pulses.
(9)
Disconnect oscilloscope probes from TI.