Tektronix 475 User Manual

Calibration—475
h. CHECK—Repeat step 33-d.
i. ADJUST—Channel 1's C36 and C37 (see Fig. 5-19)
with a low-capacitance screwdriver, for best corner and
flat-top waveform.
j. CAL A ID —Remove the 20 pF normalizer when
adjusting or checking the corner response.
k. INTERACT ION-Between Channel 1's C36 and C37.
Re-adjust both for optimum response.
I. Turn the CH 1 VOLTS/DIV switch to 20 mV.
m. CHECK—Repeat step 33-d.
n. ADJUST-Channel 1's C34 and C35 (see Fig. 5-19)
with a low-capacitance screwdriver, for best corner and
flat-top waveform.
o. INTERACTION—Between Channel 1's C34 and C35.
Re-adjust both for optimum response.
p. Turn the CH 2 VOLTS/DIV switch to 50 mV.
q. CHECK—Repeat step 33-d.
r. ADJUST-Channel 1's C32 and C33 (see Fig. 5-19)
with a low-capacitance screwdriver, for best corner and
flat-top waveform.
s. INTERACTION—Between Channel 1's C32 and C33.
Re-adjust both for optimum response.
t. Turn the CH 1 VO LTS/DIV switch to 0.1 V.
u. CHECK—Repeat step 33-d.
v. Turn the CH 1 VOLTS/DIV switch to 0.2 V.
w. CHECK—Repeat step 33-d.
x. Turn the CH 1 VOLTS/DIV switch to 0.5 V.
y. CHECK—Repeat step 33-d.
z. ADJUST—Channel 1's C30 and C31 (see Fig. 5-19)
with a low-capacitance screwdriver, for best corner and
flat-top waveform.
aa. INTERACTIO N—Between Channel 1's C30 and C31.
Re-adjust both for optimum response.
ab. Repeat step 33-d for 1 V, 2 V, and 5 V positions of
the CH 1 VOLTS/DIV switch.
ac. Disconnect the test setup.
34. Check Vertical Amplifier Bandwidth
a. Connect the output of the High-Frequency Constant-
Amplitude Signal Generator (067-0532-01) to the CH 1
input via a GR-to-BNC adapter, X I0 BNC attenuator, and a
50 12 BNC termination.
b. Set the TRIG MODE switch to AUTO, the A
TIM E/DIV switch to 0.2 ms, and both VOLTS/DIV
switches to 5 mV.
c. Adjust the High-Frequency signal generator output
amplitude for a five division display of a 3 megahertz
reference signal.
d. Without changing the output amplitude, increase the
output frequency of the High-Frequency signal generator
until the display is reduced to 3.5 divisions.
e. CHECK—Output frequency of the High-Frequency
signal generator must be at least 200 megahertz.
f. Move the test signal to the CH 2 input and set the
VERT MODE switch to CH 2.
g. Repeat the bandwidth check procedure, step 34-c
through 34-e.
h. Disconnect the test setup.
35. Check Cascaded Bandwidth
a. Set both AC-GND-DC switches to DC, both VOLTS/
DIV switches to 5 mV, the A TIM E /D IV switch to 1 ms,
and the VERT MODE switch to CH 1.
5-38

Tektronix 475 Specifications

General

Brand	Tektronix
Model	475
Category	Test Equipment
Language	English