TB 9-4931-504-40
(5) Press AUTO TRIG pushbutton and adjust TRIGGERING LEVEL CONTROL
for stable display.
(6) Press and release +SLOPE pushbutton.
Display will remain stable while
triggering on positive and negative slope of waveform.
(7) Set CH1 VOLTS/DIV switch to 5 mV and adjust oscilloscope calibrator for 2
divisions of vertical deflection.
(8) Repeat technique of (4) through (6) above.
(9) Set DELAYING SWEEP and DELAYED SWEEP SEC/DIV switch to 0.1 S
and adjust oscilloscope calibrator frequency to 10 MHz and amplitude for 2 divisions of
vertical deflection.
(10) Repeat technique of (4) through (6) above.
(11) Set DELAYING SWEEP and DELAYED SWEEP SEC/DIV switches to 10 nS
and adjust oscilloscope calibrator frequency to 100 MHz and amplitude for 2 divisions of
vertical deflection.
(12) Repeat technique of (4) through (6) above.
b. Adjustments
(1) Remove oscilloscope calibrator from equipment setup.
(2) Press AUTO TRIG pushbutton and turn TRIGGERING LEVEL control fully cw.
(3) Connect multimeter negative lead to base of Q201 (fig. 1) and positive lead to
base of' Q202 (fig. 1).
(4) Adjust R524 (fig. 1) for a +60 mV dc indication on multimeter.
(5) Turn TRIGGERING LEVEL control ccw and adjust R521 (fig. 1) for a -60 mV dc
indication on multimeter.
NOTE
When adjustments are performed, reconnect equipment as
applicable in a above.
12. Sync Bias
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to CH1 INPUT.
(2) Set TI CH1 VOLTS/DIV switch to 50 mV and press INT CH1 and HF SYNC
pushbuttons.
(3) Adjust oscilloscope calibrator frequency for 100 MHz and amplitude for one half
division of vertical deflection.
(4) Adjust LEVEL control for stable display on oscilloscope. If display does not
stabilize with LEVEL control, perform b below.
b. Adjustments. Preset TRIGGERING LEVEL control fully ccw and adjust R209
(fig. 1) fully ccw and then slowly cw until display synchronizes.