TB 9-6625-2173-24
b. Adjustments. Rotate oscilloscope calibrator EDIT FIELD knob for an err display
of 0.0%. Adjust CH 1 GAIN R180 (CH 2 GAIN R280) (fig. 4) for 5 divisions of vertical
deflection (R).
Figure 4. Test instrument left side view.
18. Horizontal Centering and Sweep Gain
a. Performance Check
(1) Position controls as listed in (a) through (c) below:
(a) CH 1 VOLTS/DIV switch to .5.
(b) MODE switch to CH 1.
(c) TRIGGERING SOURCE pushbutton pressed in for CH 1.
(2) C o n n e c t o s c i l l o s c o p e c a l i b r a t o r S O U R C E / M E A S U R E C H A N 1 t o T I
C H 1 input.
(3) Set oscilloscope calibrator CHAN 1 MARKER output to 0.2 ms.
(4) Adjust horizontal POSITION control and rotate oscilloscope calibrator EDIT
FIELD knob to align 1 time marker per division over center 8 divisions. If oscilloscope
calibrator err display readout does not indicate within r2%, perform b below.
b. Adjustments. Rotate oscilloscope calibrator EDIT FIELD knob for an err display
of 0.0%. Adjust SWEEP GAIN R770 (fig.4) until TI displays 1 marker per division over
center 8 divisions (R).
19. X10 Magnifier Gain and Fast Timing
a. Performance Check
(1) Set oscilloscope calibrator MARKER output to 20 Ps.
(2) Pull the SECONDS/DIV CAL knob out for X10 SWP MAG.