TB 9-6625-2173-35
b. Adjustments
(1) Adjust C117 (fig. 2) for optimum square wave (flat top and square corners).
(2) Adjust C104 and C102 (fig. 2) for optimum flat top and square front corners.
C110
C117
R258
X5 HORZ GAIN
C102
+20 V TP
C104
9. Vertical Gain
a. Performance Check
(1) Release both 1V and 100 mV pushbuttons out for 10 mV.
(2) Remove 5-80 pF standardizer from setup and reconnect oscilloscope calibrator
SOURCE/MEASURE CHAN 1 to TI VERT INPUT.
(3) Set oscilloscope calibrator VOLTAGE output to 50 mV, 1 kHz.
(4) Rotate oscilloscope calibrator EDIT FIELD knob to obtain a 5 division vertical
display on TI. If oscilloscope calibrator err display readout does not indicate within 3%,
perform b (1) below.
(5) Adjust TI vertical VARIABLE control fully ccw to X10.
(6) Set oscilloscope calibrator output for 0.5 V and rotate EDIT FIELD knob for a 5
division vertical display on TI. If oscilloscope calibrator err display readout does not
indicate within 3%, perform b (2) below.
(7) Press 100 mV pushbutton in and adjust vertical VARIABLE control fully cw to
X1. Rotate oscilloscope calibrator EDIT FIELD knob for 5 divisions of vertical display.
Oscilloscope calibrator err display readout will indicate within 3%.
(8) Press 1 V pushbutton in and set oscilloscope calibrator output for 5 V, and
rotate oscilloscope calibrator EDIT FIELD knob for exactly 5 divisions of vertical deflection
on TI. Oscilloscope calibrator err display readout will be within 3%.
b. Adjustments
(1) Rotate oscilloscope calibrator EDIT FIELD knob for an err display of 0.0%.
Adjust R172 (fig. 1) for 5 divisions of vertical deflection (R).
