TB 9-4931-503-35
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 .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.
display indication. Adjust R315 EXT HORIZ GAIN (fig. 3) for a 10 division horizontal
deflection on oscilloscope (R).
15. Horizontal Time
a. Performance Check
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to dual trace
amplifier CH 1 input.
(2) Press TRIGGERING SOURCE LEFT pushbutton.
(3) Set TI SECONDS/DIV switch and oscilloscope calibrator MARKER output as
listed in first row of table 7.
NOTE
If necessary, adjust TI LEVEL control for a stable display.
(4) Adjust TI POSITION control to align 2d marker with 2d vertical graticule line
on oscilloscope.