Tektronix 067-0521-00, Instruction Manual

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Performance Check— 0 6 7 -0 5 2 1 -0 0
7. Check C O M M O N MODE
a. Requirement— No vertical movement of trace from test
oscilloscope electrical center.
b. Remove the l O V signal from the EXT INPUT and set
TEST FUNCTION switch to C O M M O N M ODE
c. Check— Trace should be at electrical center of the test
oscilloscope. Rotation of the VERTICAL POSITION control
should have no effect on the position of the trace.
NOTE
Normally the trace will be within 0.5 cm of the
graticule centerline. The exact position with
respect to this centerline will depend on the DC
balance of the Vertical Amplifier in the test oscillo­
scope. This centerline of the trace indicates that
equal in-phase dc voltage are being applied to
interconnecting plug pins 1 and 3.
8. Check ALTERNATE Operation
a. Requirement— Two traces at all sweep rates of the
test oscilloscope.
b. Set the TEST FUNCTION switch to ALTERNATE, the test
oscilloscope Time Base A Triggering Source to Plug-in, Trig­
gering Level clockwise.
c. A pply a 100 V square wave from the standard am pli­
tude calibrator to EXT INPUT.
d. Rotate the test oscilloscope Time Base A Time/Cm con­
trol through all positions from 5s/Cm through .1 /xs/Cm.
e. Check— Two traces should appear at all switch posi­
tions, only one of which will show the standard amplitude
calibrator signal. See Fig. 5-1.
9. Check Slave Operation
a. Requirement— Control of vertical position of the trace
which displays the standard amplitude calibrator signal.
b. Set the test oscilloscope Horizontal Display to A A lt B,
Main Time Base (B) Triggering Source to Plug-in, Time Base
A Time/Cm to .5 ms.
c. Check— That rotation of the test oscilloscope Trace
Separation control changes the vertical position of the trace
with the calibrator signal on it. (Two traces only should
appear; four traces indicate malfunction of the slave cir­
cuitry.)
10.
Check CHOPPED Rate:
a. Requirement— Chopping rate 100 kc ± 2 5 % .
b. Remove the standard amplitude calibrator signal.
c. Set test oscilloscope Time Base A Time/Cm to 1 0 /xs,
Horizontal Display to A, Time Base A Triggering Source to
Norm. Set the 067-0521-00 TEST FUNCTION switch to
CHOPPED.
d. Adjust test oscilloscope Triggering Level for a stable
display.
e. Check— 7.5 to 12.5 cycles displayed within 10 cm. See
Fig. 5-2.
Fig. 5-2. Typical chopping waveform, transients unblanked. Note
that the display shows 10 cycles of the waveform within the 10-cm
horizontal dimension of the graticule.
11. Check CHOPPED blanking:
a. Requirement— Chopping transients must be blanked.
b. Set CRT Cathode Selector switch (on rear o f test oscillo­
scope) to Chopped Blanking.
c. Check— Rising and falling portions of waveform are
blanked. See Fig. 5-3.
12.
Check +
PULSE and — PULSE
minimum
amplitude:
a. Requirement— N ot more than 3 cm display of positive
and negative pulses with AMPLITUDE control fu lly counter­
clockwise.
b. Return test oscilloscope CRT Cathode Selector switch
to EXT CRT Cathode.
c. Set test oscilloscope Time Base A Time/Cm to 0.2 ms
and TEST FUNCTION switch to +PULSE.
®
5 -3