TB 9-4931-504-50
(7) Set CH1 VOLTS/DIV switch to 5 mV and adjust test oscillator 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 .1 S and
adjust test oscillator frequency to 10 MHz and amplitude for 2 divisions of vertical
deflection.
(10) Repeat technique of (4) through (6) above.
(11) Substitute signal generator (A5) for test oscillator, using adapter and cable
(B3 and B4).
(12) Set DELAYING SWEEP and DELAYED SWEEP SEC/DIV switches to 10 nS
and adjust signal generator frequency to 100 MHz and amplitude for 2 divisions of
vertical deflection.
(13) Repeat technique of (4) through (6) above.
b. Adjustments
(1) Remove test oscillator from equipment setup.
(2) Press AUTO TRIG pushbutton and turn TRIGGERING LEVEL control fully
cw.
(3) Connect digital voltmeter (A2) negative lead to base of Q201 and positive lead
(5) Turn TRIGGERING LEVEL control ccw and adjust R521 (fig. 1) for a -60-mV
dc indication on digital voltmeter.
NOTE
When adjustments are performed, reconnect equipment as
applicable in a above.
12. Sync Bias
a. Performance Check
(1) Connect signal generator (A5) to CH1 INPUT, using adapter and cable (B3
and B4).
(2) Set TI CH1 VOLTS/DIV switch to 50 mV and press INT CH1 and HF SYNC
pushbuttons.
(3) Adjust signal generator frequency for 100 MHz and amplitude for one-half
divisions of vertical deflection.
(4) Adjust LEVEL control for stable display on oscilloscope (A3) crt (cathode ray
tube). If display does not stabilize with LEVEL control, perform b below.
b. Adjustments. Preset TRIGGERING LEVEL control fully ccw and adjust R209
