TB 9-6625-2112-35
Table 7. Delay/Advance
Test instrument
Delay/
Delay/
Repetition
advance
advance vernier
rate
Width
Oscilloscope
switch settings
control positions
switch settings
switch settings
indications
cw
.1 MHz
Minimum
1 s
1 s or greater
ccw
.1 MHz
Minimum
10 s
1 s or less
cw
10 kHz
10 s
1 s1
10 s or greater
100 s
1 s
10 s or less
ccw
10 kHz
cw
1 kHz
100 s
1 s
100 s or greater
1 ms
ccw
1 kHz
10 s
100 s or less
1 ms
cw
.1 kHz
1 ms or greater
10 s
10 ms
ccw
.1 kHz
1 ms or less
100 s
10 ms
cw
10 Hz2
1 ms
10 ms or greater
1
WIDTH vernier switch fully cw.
2
Set REPETITION RATE vernier switch fully ccw.
b. Adjustments
(1) Adjust R65 (fig. 2) until leading edge of output pulse indicated on oscilloscope is
10 s or more to the right of leading edge of sync pulse (R).
(2) Adjust R70 (fig. 2) until pulse delay indicated on oscilloscope is 10 s or less (R).
12. Rise and Fall Time
a. Performance Check
(1) Position controls as listed in (a) through (g) below:
(a) WIDTH switch to 10 s and vernier control fully ccw.
(b) REPETITION RATE switch to .1 MHz and vernier control fully cw.
(c) DELAY/ADVANCE controls to minimum.
(d) AMPLITUDE VOLTS switch to 2 V and vernier control fully cw.
(e) GATE MODE switch to NON-GATED.
(f) PULSE MODE switch to DELAY.
(g) PULSE POLARITY switch to NEG.
(2) With PULSE OUTPUT still connected to oscilloscope, measure rise and fall
time, using standard measurement techniques. Rise and fall time indicated on oscilloscope
will be 13 ns or less. If overshoot is not less than 5 percent, preshoot is not less than 2
percent and droop is not less 6 percent of pulse amplitude, perform b below.
b. Adjustments
(1) Adjust R309 (fig. 2) for minimum pulse aberrations (R).
(2) Adjust C401 (fig. 2) for minimum pulse overshoot (R).
