TB 9-4931-498-40
(1) mVOLTS/DIV switch to 50.
(2) DOT RESPONSE control to center position.
(3) NORMAL pushbutton pressed.
(4) +UP pushbutton pressed.
(5) SLOPE pushbutton to +.
(6) RANDOM pushbutton pressed.
(7) TRIG AMP pushbutton to Xl0.
(8) INT pushbutton pressed.
(9) SCAN MAN pushbutton pressed.
(10) SWEEP RANGE switch to 50 ns.
(11) TIME/DIV switch to 5 ns.
(12) STABILITY control to cw.
NOTE
If excessive jitter (greater than 75 ps) is present on leading
edge of TI pulse, TI should be repaired.
8. Pulse Characteristics
a. Performance Check
CAUTION
Do not exceed 100 V p-p input to TI.
NOTE
For Ballantine, Model 61252A, always adjust trigger level
control to minimum position that will provide an output. If the
control is adjusted above minimum triggering position, it will
cause pulse to deviate as much as 5 percent from the ideal.
(1) Adjust controls of oscilloscope, oscilloscope calibrator, and TI trigger level
control (Ballantine, Model 61252A) for an indication of 1 pulse on oscilloscope display.
NOTE
It may be easier to make the initial sync adjustment in SCAN
REP mode and then switch to MAN.
(2) Adjust TRIG LEVEL control on oscilloscope to view the leading edge of the pulse.
(3) Adjust TIME/DIV switch towards 50 ps and use TIME POSITION control to
keep leading edge of pulse visible.
(4) Readjust oscilloscope calibrator, TI trigger level (Ballantine, Model 61252A),
and oscilloscope (LEVEL) controls for best risetime.