TB 9-6625-2089-24
(19) Set SCOPE TRIG/FREQ MEASUREMENT DELAY (μSEC) RANGE switch
to X400 and SCOPE TRIG/FREQ MEASUREMENT DELAY (μSEC) MULT control to 10.0.
(20) Measure jitter of pulse on oscilloscope CH1 (use CH1 as trigger source). Jitter
will be less than 0.41 μs.
(21) Position controls as listed in (a) through (c) below:
(a) PRF SELECT RANGE switch to X1K.
(b) SCOPE TRIG/FREQ MEASUREMENT DELAY (μSEC) RANGE switch to X0.4.
(c) SCOPE TRIG/FREQ MEASUREMENT DELAY (μSEC) MULT switch to 1.25.
(22) Measure jitter of pulse on oscilloscope CH1. Jitter will be less than 0.01 μs.
b. Adjustments. No further adjustments can be made.
11. Challenge Code Accuracy
a. Performance Check
(1) Connect equipment as shown in figure 2.
Figure 2. Challenge code - equipment setup.
(2) Position controls as listed in paragraph 7 e.
(3) Adjust oscilloscope controls as required to observe two pulses on CH1 and timing
markers on CH2.
(4) Adjust oscilloscope CH1 and CH2 position controls so that a peak of 0.1 μs
marker (CH2 input) intersects leading edge of CH1 input pulse.
CHANGE 1 13