TB 9-6625-1995-24
(24) Adjust R255 (fig. 1) for a sweep trigger point at graticule centerline (TRIG'D
light on).
(25) Adjust R320 (fig. 1) for a sweep trigger point at approximately 0.3 division from
p
bottom of waveform as delayed triggering LEVEL control is rotated through negative (
ortion of its range.
(26) Adjust delayed triggering LEVEL control to 0 and release delayed triggering
SOURCE pushbutton to EXT.
(27) Adjust R230 (fig. 1) for a sweep triggering point at graticule centerline (TRIG'D
light on).
(28) Press delayed triggering SOURCE pushbutton to INT.
(29) Adjust R25, R59, and R125 (fig. 2) to midrange.
(30) Adjust R145 and R155 (fig. 2) fully cw. TRIG'D light should be on and the
(31) Adjust R155 (fig. 2) ccw until a stable display occurs, then cw until display is
unstable.
(32) Connect multimeter HI to TP145 (fig. 2) and LO to chassis ground.
(33) Adjust R145 (fig. 2) ccw until a stable display just occurs. Record multimeter
indication.
(34) Adjust R145 (fig. 2) ccw until TRIG'D light just goes out. Record multimeter
indication.
(35) Adjust R145 (fig. 2) for the average of multimeter indications recorded in (33)
and (34) above. Disconnect multimeter HI from TP145 (fig. 2).
(36) Disconnect delay line cable from J170 (fig. 2) and connect multimeter HI to
Figure 2. Triggering adjustments, SN B069999 and below right side view.
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