Tektronix TU-7, Инструкция по эксплуатации

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Calibration— Type TU-7
1. Remove signal leads from
pins 1 an d 3.
2. D rill tw o 5 / 16-inch holes
in side o f casing
3- Place rubber grommets
(3 4 8 -0 0 3 ) around “ p ig ­
ta ils ."
4 . Insert “ p ig ta ils " through
holes in casing.
5. Solder both outer conduc­
tors to short piece o f bus
w ire.
6 . Solder Bus W ire to p in 2.
7. Solder center conductors to
Pins 1 an d 3.
^Flexible 16 -pin p lu g -in
Extension (0 1 2 -0 3 8 ) may
be substituted.
1 &7
8-Inch 5 0 -O hm C oaxia l
“ P ig ta ils” (0 1 7 - 5 0 3 ) .
Rigid 16-Pin P lug-In Ex­
tension (0 1 3 -0 5 5 1 * .
Fig. 5-1 . Construction of special exte nde r fo r checking pulse risetim e. T e ktron ix p a rt numbers are given in parentheses.
b. Turn on the instrument power and allow 10 minutes
for warmup.
c. Set the TEST FUNCTION switch to LOW LOAD.
d. Connect the voltmeter between ground and the
+225 V front-panel jack.
e. Press the +225 V pushbutton and check for +225
volts; then check for zero volts with the pushbutton
released.
Fig. 5-2. Left side o f Type TU-7 show ing c a lib ra tio n adjustm ents
and test points.
4. Cheek VARIABLE Control
o. Reset the Type TU-7 controls to the positions given
under “ Preliminary Instructions".
b. Set the Time Base A triggering control to free-run
the sweep.
c. Adjust the Focus and Intensity controls for a proper
display.
d. Connect a 50-ohm coaxial cable from the Calibrator
to the Type TU-7 EXT INPUT connector,.
e. Set the Calibrator for an output amplitude of 0.5
volt.
f. Turn the Type TU-7 VARIABLE control fully clock­
wise and check for approximately a l-cm free-run­
ning Calibrator signal on the crt.
g. Turn the VARIABLE control fully counterclockwise
and check that no signal is visible on the trace.
5. Check Internal Plug-ln Trigger
a. Set the indicator oscilloscope Trigger Source switch
to the External position.
b. Set the Calibrator amplitude for 5 volts.
c. Adjust the Type TU-7 VARIABLE control for 4 cm of
vertical deflection on the crt.
d. Connect the test oscilloscope probe to pin 5 of the
interconnecting plug and check for at least 65 mv
of Calibrator signal. (This signal simulates the
internal trigger from a dual-trace plug-in unit with
single-channel pickoff.)
e. Remove the probe.
5-2