Tektronix 1A4 Instruction Manual page 152

(Optimum square corner and
(A) Correct.
(C) Input-capacitance adjustment incorrect.
X i N o u L y a l
aa
(F) Bottom ane-portion view showing adjustment locations
for Channel 1. Same physical arrangement applies to the
other channels.
Fig. 7-28. Waveform and adjustment locations for step 21. Sweep rate for the waveforms is 0.5 ms/em.
m. Check that the Type 106 Square-Wave Generator is
disconnected from the Type 1A4.
n. Place the oscilloscope in the upright position.
Alternate Method
If a normalizer is not available, the input capacitance of
of one or more channels can be adjusted by using a 10
attenuator probe and a known properly-adjusted channel.
To use a 10 probe in place of a normalizer, proceed as
follows:
a. Connect the cable end of the 10 probe to a channel
7-32
that is properly adjusted. This channel will be used as the
reference.
b. Set the V/CM switch of the reference channel to .01
and the AC-GND-DC switch to DC. (As a guide for setting
the remaining controls, use the list that precedes step 21.)
c. Connect a 2X attenuator (item 11) to the output con-
d. Connect the probe tip to the other end of the 2X
attenuator and connect the probe ground lead to the gen-
erator ground. Adjust the generator Amplitude control to
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