TB 9-4931-504-40
b. Adjustments
(1) Connect multimeter negative lead to base of Q201 (fig. 1) and positive lead to
base of Q202 (fig. 1).
(2) Adjust R530 (fig. 1) for 0 (zero) voltage indication on multimeter.
Figure 1. Test instrument - right -side view.
11. Positive and Negative Balance
a. Performance Check
(1) Position controls as listed in (a) through (e) below:
(a)
CH2 VOLTS/DIV switch to 50 mV.
DELAYING SWEEP and DELAYED SWEEP SEC/DIV switches to 1 S.
(b)
(c)
HF SYNC pushbutton released.
(d)
INT CH1 pushbutton released.
(e)
REP pushbutton pressed.
(2) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to CH1 INPUT
and EXT INPUT.
(3) Adjust oscilloscope calibrator level sine output frequency for 1 MHz and
amplitude for 2 divisions of vertical deflection on oscilloscope.
(4) Adjust TRIGGERING LEVEL control for stable display.
If stable display
cannot be obtained, perform b below.