TB 9-4931-503-24
d. Connect oscilloscope to a 115 V ac source and energize. Allow 30 minutes for warm-up.
e. Position dual trace amplifier controls as listed in (1) through (5) below:
(1) DISPLAY ON pushbutton pressed.
(2) MODE CH 1 pushbutton pressed.
(3) CH 1 VOLTS/DIV switch to .5.
(4) TRIGGER CH 1 pushbutton pressed.
(5) All remaining pushbuttons released (out).
f. Position TI controls as listed in (1) through (7) below:
(1) POSITION control to midrange.
(2) SECONDS/DIV switch to AMP.
(3) SECONDS/DIV CAL control fully cw to detent.
(4) AUTO TRIG pushbutton pressed.
(5) + SLOPE pushbutton pressed.
(6) TRIGGERING SOURCE EXT pushbutton pressed.
(7) All remaining pushbuttons released (out).
g. Adjust oscilloscope INTENSITY and FOCUS controls for suitable viewing.
CAUTION
High intensity will damage oscilloscope crt.
Adjust
INTENSITY control to lowest possible level consistent with
suitable display.
14. External Horizontal Gain
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI EXT
HORIZ AMP.
(2) Set oscilloscope calibrator VOLTAGE output for 0.5 V, 1 kHz.
(3) Adjust TI POSITION control to position dots to the extreme right and left
vertical graticule lines.
(4) Adjust dual trace amplifier CH 1 POSITION control to vertically center the dots.
(5) Adjust oscilloscope calibrator EDIT FIELD knob for 10 divisions of horizontal
deflection on oscilloscope. If oscilloscope calibrator err display does not indicate within
3%, perform b below.
b. Adjustments. Adjust oscilloscope calibrator EDIT FIELD knob for a 0.0% err
display indication. Adjust R315 EXT HORIZ GAIN (fig. 3) for a 10 division horizontal
deflection on oscilloscope (R).
