Tektronix 475 User Manual

Calibration—475
g. Set the VERT MODE switch to CH 1.
h. CHECK—Repeat step 50-b.
i. Set the A SOURCE switch to NORM.
j. CHECK—Repeat step 50-b.
k. Set the A SOURCE switch to CH 2.
I. CHECK—Repeat step 50-f.
m. Disconnect the test setup.
51. Check HF RE J Triggering
a. Set the HORIZ DISPLAY switch to A f the TIM E /D IV
switches to 2 /is, the TRIG MODE switch to AUTO, both
COUPLING switches to HF REJ, and both SOURCE
switches to NORM.
b. Connect the output of the Medium-Frequency
Constant-Amplitude Signal Generator (Type 191) to the
CH 1 input via a 50 12 5 ns GR cable, a 50 12 Signal Pickoff
Unit (Type CT-3), a GR-to-BNC adapter, and an 18-inch
50 12 BNC cable.
c. Connect the 10% output of the Signal Pickoff Unit to
the A External Trigger input via an 18-inch 50 12 BNC cable
and a 50 12 BNC termination.
d. Adjust the Medium-Frequency signal generator for a
0.5 volt, 50 kilohertz, output signal.
e. Adjust the CH 1 V OLTS/DIV switch for a 0.3 division
display.
f. CHECK—That a stable display can be obtained on
both slopes of the displayed waveform in all positions of
the A COUPLING switch, by adjusting the A LEVEL
control.
g. Increase the output of the Medium-Frequency signal
generator to 1 megahertz.
h. CHECK—That a stable display cannot be obtained in
the HF REJ position of the A COUPLING switch.
i. Set the A SOURCE switch to EXT.
j. CHECK—That a stable display cannot be obtained in
the HF REJ position of the A COUPLING switch.
k. Reduce the Medium-Frequency signal generator
output frequency to 50 kilohertz.
I. CHECK—That a stable display can be obtained on
both slopes of the displayed waveform, in all positions of
the A COUPLING switch, by adjusting the A LEVEL
control.
m. Move the external Trigger signal to the B External
Trigger input.
n. Set the HORIZ DISPLAY switch to B DLY'D.
o. CHECK—That a stable display can be obtained on
both slopes of the displayed waveform, in all positions of
the B COUPLING switch, by adjusting the LEVEL
controls.
p. Increase the output of the Medium-Frequency signal
generator to 1 megahertz.
q. CHECK—That a stable display cannot be obtained in
the HF REJ position of the B COUPLING switch.
r. Set the B SOURCE switch to EXT.
s. CHECK—That a stable display cannot be obtained in
the HF REJ position of the B COUPLING switch.
t. Reduce the Medium-Frequency signal generator out
put frequency to 50 kilohertz.
u. CHECK—That a stable display can be obtained on
both slopes of the displayed waveform, in all positions of
the B COUPLING switch, by adjusting the LEVEL
controls.
v. Disconnect the test setup.
5-45

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English