TB 9-6625-1995-24
(60) Release delayed triggering SOURCE pushbutton to EXT and adjust R225 (fig. 2)
for a delayed sweep trigger point at graticule centerline.
(61) Press delayed triggering SOURCE pushbutton to INT.
9. Horizontal Timing and Differential Delay Time
a. Performance Check
(1) Position controls as listed in (a) through (q) below:
MAIN TRIGGERING SLOPE switch to +.
(a)
MAIN TRIGGERING LEVEL control to midrange.
(b)
Press MAIN TRIGGERING MODE NORM pushbutton.
(c)
Press MAIN TRIGGERING COUPLING AC pushbutton.
(d)
Press MAIN TRIGGERING SOURCE INT pushbutton.
(e)
POSITION control to midrange.
(f)
TRACE SEP control fully cw.
(g)
TIME/DIV OR DLY TIME switch to 1 ms.
(h)
DLY'D time/division switch to 1 ms PUSH FOR DLY'D.
(i)
VARIABLE (CAL IN) control to in position.
(j)
DELAY TIME MULT dial to 0.0.
(k)
INTENSITY control for suitable viewing.
(l)
CONTRAST control for suitable viewing.
(m)
Delayed triggering LEVEL control to RUNS AFTER DELAY TIME.
(n)
Press delayed triggering SLOPE pushbutton to +.
(o)
Press delayed triggering COUPLING pushbutton to AC.
(p)
Press delayed triggering SOURCE pushbutton to INT.
(q)
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to vertical
amplifier CH 1.
(3) Set oscilloscope calibrator MARKER output for 1 mS/D.
(4) Adjust oscilloscope INTENSITY and FOCUS controls for suitable viewing.
(5) Adjust MAIN TRIGGERING LEVEL control for a stable display and set
vertical amplifier controls for approximately 2 divisions of display positioned in the center
graticule area.
(6) Adjust POSITION control to align 2d time marker with 2d vertical graticule
line on oscilloscope.
(7) Adjust SWP CAL control (front panel) for 1 time marker per division over the
center 8 divisions.
(8) Set TIME/DIV OR DLY TIME and DLY'D time/division switches to 2 ns
PUSH FOR DLY'D.
(9) Set oscilloscope calibrator MARKER output for 2 nS/D.
(10) Adjust POSITION control to align 2d time marker with 2d vertical graticule
line. Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton to align