Performance Verification
18
013-0278-00 Video Display Clamp
Video display clamp
Coaxial cable
Pulse
Generator
2.5X attenuator
Dual-input
coupler
Sinewave
Generator
Dual-input
coupler
Figure 15: 60 Hz rejection test setup
3.
Set the Video Display Clamp as follows:
H
Polarity
to
--
(negative)
H
Filter
to
Off
4.
Set the sinewave generator as follows:
H
Set the frequency to 60 Hz
H
Adjust the amplitude to 0 V
5.
Set the pulse generator as follows:
H
Set the compliment to --
H
Adjust the period to 15 kHz
H
Adjust the pulse duration to 5
s
H
Set the high level to 150 mV
H
Set the low level to --420 mV
6.
Set the test oscilloscope sec/div to 2 ms.
7.
Set the sinewave generator amplitude to create a 1 V
p-p
display of the 60 Hz
sinewave.
8.
Set the test oscilloscope to display channel 1 (channel 2 off).
9.
Verify that the amplitude of the 60 Hz sinewave component of the waveform
is
≤
70 mV
p-p
(see Figure 16).
