TB 9-6625-1995-35
Figure 2. Triggering adjustments, SN
B069999 and below right side view.
(37) Adjust R155 (fig. 2) until TRIG'D light just goes out. Record digital multimeter
indication.
(38) Adjust R155 (fig. 2) cw until waveform is stable. Record digital multimeter
indication.
(39) Adjust R155 (fig. 2) for the average of digital multimeter indications recorded in
(37) and (38) above.
(40) Connect delay line cable J170 (fig. 2) and disconnect digital multimeter.
(41) Adjust MAIN TRIGGERING LEVEL control to 0.
(42) Adjust R25 (fig. 2) for a stable display at graticule centerline (TRIG'D light on).
(43) Adjust R125 (fig. 2) for a sweep trigger point at approximately 0.5 division from
bottom of waveform as MAIN TRIGGERING LEVEL control is rotated through negative
(-) portion of its range.
(44) Press MAIN TRIGGERING SOURCE EXT pushbutton. Adjust R59 (fig. 2) for
a sweep trigger point at graticule centerline.
(45) Move connection from MAIN TRIG IN to DLY'D TRIG IN.
(46) Press MAIN TRIGGERING SOURCE INT pushbutton and adjust delayed
triggering LEVEL control to 0.
(47) Adjust R225, R245, and R325 (fig.2) to midrange.
(48) Adjust R345 and R355 (fig. 2) fully cw.
(49) Repeat (6) and (7) above.
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