TB 9-6625-1967-24
s duration, -3.5 V output with +2.0 V offset and
(4) Set pulse generator for 50
external trigger.
(5) Pull POWER switch to on.
(6) Position controls as listed in (a) through (c) below:
/DIV switch to 200.
(a) m
(b) Multiplier switch to X1.
(c) CABLE DIELECTRIC (all pushbuttons to out positions).
NOTE
In (9) below, do not exceed 0.85 V to CABLE input with
oscilloscope calibrator.
(7) Connect oscilloscope calibrator output to CABLE input, using cable and X10
attenuator.
(8) Connect oscilloscope calibrator external trigger output to pulse generator
trigger input.
(9) Set oscilloscope calibrator for 0.2 S marker output.
(10) Align first time-mark behind first vertical graticule line on crt using
DISTANCE control. If the 11th time-mark does not align within 0.2 minor divisions to the
left of the 11th graticule line, perform b below.
(11) Push POWER switch to off and replace U1575 (fig. 7). Pull POWER switch to on.
b. Adjustments. Adjust R1435 FT/DIV (fig. 7) to align alternate markers behind each
vertical graticule line using DISTANCE control to keep first time-mark behind first
vertical graticule line (R).
20. Distance Dial
a. Performance Check
(1) Position controls as listed in (a) through (d) below:
DIV switch to 500.
(a) m
(b) FEET/DIV switch to 1.
(c) CABLE DIELECTRIC SOLID POLY pushbutton in.
(d) Multiplier switch to X.1.
(2) Align incident pulse of crt display to graticule reference line (2d graticule), using
ZERO REF control.
