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Poor
Picture
Snowy
Image
(cont'd.)
Horizontal
Scan Lines,
Rolling Up
or Down
Negative,
scrambled,
or faded
image
Halo Effect
Noisy Power Supply
Ground Looping on
video cable
Low voltage
The Lens Foam
Ring (Donut) is not
touching the inside
of the dome.
25
Check connections.
Relocate or replace
the power supply.
Check the coax cable
shield is not touching
ground, e.g. at
couplings.
Check video polarity.
Check voltage at the
input power cable.
Must be >10.5V dc or
>12V ac.
Make sure the Foam
Ring touches the
dome's inside
surface.
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