- 15 -
Poor
Picture
Quality
Dim Image
Snowy
Image
Horizontal
Scan Lines,
Rolling Up
or Down
Negative,
scrambled,
or faded
image
Iris closed
Poor Video
Signal
Noisy Power
Supply
Ground
Looping on
video cable
Low voltage
of this manual for contact
information.
Increase iris level on lens
Ensure the video cable is
correctly matched and
terminated with 75 ohms at
each end.
Make sure the video cables are
of similar types.
Check all power connections.
Relocate or replace the power
supply.
Check the coax cable shield is
not touching “ground”, e.g. at
the couplings.
An electrically isolated circuit
board or isolation transformer
may be required.
Check voltage at input power
cable.
Must be >12V dc or >17V ac.
Video leads reversed
connection.
Summary of Contents for EX7
Page 22: ... 16 7 Mounting Hole Diagram ...
