TB 9-6625-2163-35
14. Read Delay and Error Detector
a. Performance Check
(1) Connect RTS oscilloscope CH 1 probe to test point A10TP6 (fig. 2).
(2) Set FUNCTION switch to SYSTEM, MODE switch to 1, and CODE switches to
7777.
(3) Press PUSH TO TEST switch and turn to LOCK position.
(4) Set RTS Menus to INITIAL settings and perform a power measurement. Stop
measurement after reading has been obtained. ACCEPT lamp will glow.
(5) Press RTS oscilloscope AUTO-SCALE pushbutton and set TIME/DIV
switch to 20 s. Verify width of pulse on oscilloscope CH 1 is between 140 and 160 s.
(6) Disconnect CH 1 probe from test point A10TP6 (fig. 2) and connect it to test
point A11TP3 (fig. 2).
(7) Set TIME/DIV switch to .1 SEC.
If negative pulse width on CH 1 is not
between 0.34 and 0.36 s, perform b below.
oscilloscope CH 1 is 0.35 s (R).
15. Reply Evaluator
a. Performance Check
(1) Set MODE switch to 2.
(2) Install variable attenuator between RTS MAIN RF I/O connector and circulator
PORT 1. Set variable attenuator to minimum setting.
(3) Connect RTS oscilloscope CH1 probe ground lead (-) to A13TP2 (fig. 2) and probe
tip (+) to A12TP2 (fig. 2). Set oscilloscope CH1 VOLT/DIV switch for 200 mV,
COUPLING to DC, and adjust vertical position control to align trace on bottom graticule
line.
(4) Perform a power measurement.
Stop measurement after reading has been
obtained. ACCEPT lamp will glow.
(5) Change RTS MENU 3 M2 CODES to 7767.
Record oscilloscope voltage
indication. Return CODE switches to 7777.
(6) Adjust variable attenuator until ACCEPT and REJECT indicators glow
alternately. Oscilloscope dc voltage will be approximately 70-80 percent of that recorded in
(5) above; if not, perform b below.
NOTE
The 70-80 percent of the dc voltage recorded in (5) above or the
alternating light condition can be held for just a short time.
