The Video Display Clamp
4
013-0278-00 Video Display Clamp
Video display clamp
Figure 5: Probing circuits with the video display clamp
Use the following short procedure to install and use the Video Display Clamp.
Attaching the video display clamp to an oscilloscope with a TEKPROBE
TM
Level 2 interface automatically turns on the video display clamp.
STOP
. The use of this clamp requires that the test oscilloscope has a TEK-
PROBE
TM
Level 2 interface and the vertical input impedance is 1 M
Ω
.
1.
Attach the video display clamp to the input of the oscilloscope and apply the
test signal to the input of the video display clamp. See the examples
provided in Figures 3 through 5.
2.
Set the input impedance of the oscilloscope to 1 M
Ω
.
3.
Set the
SYNC POLARITY
of the video display clamp to match the polarity
of the signal source.
H
Set to
--
for video signals with negative sync pulses.
H
Set to
+
for video signals with positive sync pulses.
4.
Set the
CLAMP FILTER
of the video display clamp.
H
Set to
OFF
for video signals without a color burst signal.
H
Set to
ON
for video signals with a color burst signal.
5.
Set the controls of the test oscilloscope as you normally would to view the
signal.
Procedure
