TB 9-6625-2239-35
amplitude on TI crt. Displayed waveform will be greater than 4.2 divisions in amplitude
throughout entire range to 100 MHz.
b. Adjustments. No further adjustments can be made.
12. Calibrator
a. Performance Check
(1) Set A AND B TIME/DIV switches to .5 ms.
(2) Set CH 1 VOLTS/DIV switch to 50 mV (200mV for AN/USM-425(V)l).
(3) Connect TI CALIBRATOR (front panel) and chassis GND to CH 1 input.
(4) Adjust CH 1 VOLTS/DIV VAR control for 6 divisions (5 divisions for AN/USM-425(V)l).
(5) Remove connection in (3) above from CH 1 input, and connect oscilloscope
calibrator SOURCE/MEASURE CHAN 1 to TI CH 1.
(6) Set oscilloscope calibrator VOLTAGE output to .3 V (1 V for AN/USM-425(V)l).
(7) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton for 6
divisions (5 divisions for AN/USM-425(V)l). If oscilloscope calibrator err display readout
does not indicate 1%, perform b below.
b. Adjustments
(1) Rotate oscilloscope calibrator knob located below EDIT FIELD pushbutton for
err display of 0.0%.
(2) Adjust TI VOLTS/DIV controls for 6 divisions (5 divisions for AN/USM-425(V)l)
of vertical deflection.
(3) Disconnect oscilloscope calibrator from CH 1 input and connect CALIBRATOR
to CH 1 input.
(4) Adjust appropriate resistor for TI model identified in table 11 for indicated
divisions of vertical deflection.
Adjustments
Model
(R)
Divisions
AN/USM-425(V)l
R386 (fig. 1)
5
Tektronix, Type 465
R1597 (fig. 6)
6
Tektronix, Type 465B
R4293 (fig. 7)
6
13. Power Supply
NOTE
Do not perform power supply checks if all other parameters are
within tolerance.
test points for TI from CH 1 input and connect TI CALIBRATOR model identified in table
12. If digital multimeter does not indicate within specified limits, perform b below.
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