TB 9-4931-505-24
(6) Set VOLTS/DIV switch to 0.1 while maintaining a 6 division oscilloscope
display with oscilloscope calibrator amplitude. If leading corner of square wave indicates
roll off or overshoot, perform b (2) below.
(7) Move cable from TI -INPUT to +INPUT.
(8) Press -INPUT coupling pushbutton to GND and release +INPUT GND pushbutton.
(9) Set VOLTS/DIV switch to 50m and repeat technique of (4) above. If optimum
square wave is not displayed, perform b (3) below.
(10) Set VOLTS/DIV switch to 0.1 and repeat technique of (4) above. If optimum
square wave is not displayed, perform b (4) below.
(11) Remove standardizer.
b. Adjustments
(1) Adjust standardizer and C28 (fig. 1) for optimum square wave (R).
(3) Adjust C8 (fig. 1) for same display as in (1) above (R).
(4) Adjust C3 (fig. 1) and C5 (fig. 1) for same display as in (2) above (R.)
a. Performance Check
(1) Set VOLTS/DIV switch to 5 and both + and -INPUT coupling pushbuttons to GND.
(2) Adjust time base unit for a 5 ms sweep.
(3) Connect calibrator to TI +INPUT and -INPUT connectors.
(4) Adjust calibrator frequency for 100 Hz and output for 7.070 V rms.
(5) Release +INPUT and -INPUT GND coupling pushbuttons and set VOLTS/DIV
switch to 1m. If oscilloscope does not indicate less than 2 divisions of display, perform b (1)
below.
(6) Set VOLTS/DIV switch to 5 and adjust ac calibrator for 14.14 V rms.
(7) Set VOLTS/DIV switch to 0.2. If amplitude of oscilloscope display is not 0.2
division or less, perform b (2) and (3) below.
b. Adjustments
(1) Adjust C104 (fig. 1) or C204 (fig. 1) until oscilloscope display is less than 2
divisions (R). If more than 2 turns are required, adjust C104 (fig. 1) and C204 (fig. 1) in
equal and opposite amounts and perform paragraph 10 a (7).
(2) Adjust R10 (fig. 1) for minimum deflection of oscilloscope display.
until oscilloscope display is 0.2 division or less.