Tektronix 067-0521-00, Instruction Manual

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d. W ith the 067-0521-00 disconnected from the test oscillo­
scope, apply 100 volt dc signal from the standard amplitude
calibrator to EXT INPUT.
e. Connect the precision dc voltmeter between pin 1 of
the interconnecting plug and ground. See Fig. 5-11.
f. Check— For a voltmeter reading of 0.4 V ± 4 mV.
Performance Check— 0 6 7 -0 5 2 1 -0 0
P re c is io n dc v o ltm eter
lead to pin I .
Fig. 5 -1 1 . Test equipment setup for step 18.
18. Check ±PULSE Risetime:
a. Requirement— Risetime no more than 3 ns.
b. Disconnect the 100 volt dc calibrator signal from the
EXT INPUT. Connect a flexable plug-in extension to the test
oscilloscope interconnecting socket. Connect the modified
rigid plug-in extension between the flexable plug-in exten­
sion and the 067-0521-00. See Fig. 5-12.
c. Turn on the realtime and sampling test oscilloscope,
allowing approximately 10 minutes for warm-up.
F le x ib le plug-in
extension
Lead to pin I M odified rig id
o f s p e c ia l exten sio n plug-in extension
NOTE
When operating the plug-in unit from a plug-in
extension, the plug-in sensing switch located near
the top rear of the plug-in compartment must be
manually operated. To operate the switch manu­
ally, pull the plastic plunger froward to the stop
position.
d. Connect the GR pigtail from pin 1 of the modified
rigid plug-in extension through a 2 ns cable and a coupling
capacitor to Input A of the dual trace sampling amplifier.
e. Connect the GR pigtail from pin 3 of the modibied
rigid plug-in extension to Input B of the dual trace sampling
am plifier in the same manner. See Fig. 5-12.
f. Set the dual trace sampling am plifier controls as
follows:
Mode Switch
A - f B
Internal Trigger A
M v/D iv (both) 50
2-200 Var (both) Calib.
Channel A Polarity Norm.
Channel B Polarity Inv.
g. Set the sampling sweep controls as follows:
Time/Div 1
[IS
Variable Calib.
Horiz Mag
X I
Dots Per Div
100
Sweep Mode Normal
Trigger -f-1 nt
Trigger Sensitivity
Clockwise (until stable
waveform appears)
h. Change the sampling sweep Tim e/Div switch to 1 ns.
Move the rising portion of the display to the center area of
the graticule with the Delay control and the sampling am pli­
fier position control. Adjust the Type 067-0521-00 Amplitude
control for a display 4 cm in amplitude.
i. Check— Risetime should be 3 ns (3 cm) or less. See Fig.
5-13.
Fig. 5 -1 2 . Test equipment setup for risetime check (step 1 9 ).
Fig. 5 -1 3 . Typical display showing pulse risetime.