TB 9-4931-501-35
(5) Position time base controls as listed in (a) through (f) below:
(a) AUTO TRIG switch in.
(b) MAIN SEC/DIV switch to 0.1 s.
(c) SWP MAG switch in.
(d) TRIG SOURCE LEFT and EXT switches in.
(e) MAIN TRIG LEVEL control for a stable display on TI screen.
(f) POSITION control to align fourth time marker with second vertical
graticule line on TI.
(6) If the 12th time marker is not within 2.5 minor divisions of 10th vertical
graticule line, perform b(1) below.
AMPLITUDE control for convenient display on TI.
(8) Adjust TI MAIN TRIG LEVEL control for a stable display and time base
POSITION control to align seventh time marker with second vertical graticule line on TI
screen.
(9) If 23d time marker is not within 3 minor divisions of 10th vertical graticule
line, perform b(2) and (3) below.
b. Adjustments
(1) Adjust 10 ns TIMING C210 (fig. 3) for one time marker per division over
center eight vertical graticule lines (R).
(2) Adjust 5 ns TIMING C235 (fig. 3) for two time markers per division over
center eight vertical graticule lines (R).
(3) Due to interaction between C210 and C235, repeat a(4) through (9) above to
obtain best timing compromise.
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