Performance Verification
12
013-0278-00 Video Display Clamp
50
Ω
terminator
Video display clamp
Coaxial cable
Pulse
Generator
2.5X attenuator
Dual-input
coupler
Figure 9: Gain error test setup
3.
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 500 mV
H
Set the low level to --500 mV
4.
Set the Video Display Clamp as follows:
H
Polarity
to
--
(negative)
H
Filter
to
Off
5.
Set the test oscilloscope to display channel 1 (channel 2 off).
6.
Vertically position the channel 1 display to view the entire signal.
7.
Verify that the pulse amplitude is between 975 mV
p-p
and 1.025 V
p-p
(see
Figure 10).
