P.O. Box 749 Peekskill, NY 10566 Tel: (845) 737-7009 Fax: (845) 737-0426 Web: www.compuvideosystems.com
Mounting Location:
Model
Mounting locations:
VDA-2-HV
As close to center of the two output feeds or at receiving end
for Ground Loop Blocking
Model
# Of Inputs # Of Outputs
Controls
Special Features
VDA-2-HV
1
2
Gain, High Freq.
Ground Loop
Isolation
INSTALLATION
The VDA-2-HV is a light weight unit able to be mounted at any location. After the unit has
been placed, you can connect the power.
CONNECTING THE POWER
For the VDA-2-HV, Hum in a video picture can be caused by several things:
A) Ground loop on Video or Common Power Supply
B) Camera
C) Power supply failure
D) Induced hum due to proximity of ac power feeds.
The VDA-2-HV is designed to only reduce or eliminate ground loop
hum between two points and will have minimal to no effect on the
other types of distortion. If you have any splices or bare cables that
may be touching metal between the camera and the VDA-2-HV, isolate
it with tape so that it does not touch any other metal items.
Ground loops usually become visible when several cameras are connected together at a
switcher or a quad screen splitter. The problem also occurs when a camera is located in a
different “ground” plane than the monitor is located in. The hum or interference is caused by
the differences in ground voltages from each device mixing together. By using the
VDA-2-HV to isolate the signal and the ground, the problem is resolved.
The VDA-2-HV
corrects the ground-loop problem on the input side of a run, this still leaves a
potential for a ground-loop to occur between the 2 locations on the output side of the
VDA. If this problem should occur on one or both outputs simply add a GLB-ll to one
of the 2 outputs.
Summary of Contents for VDA-2-HV
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