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The most common types of television interference are as follows:
SNOWY PICTURE
Snowy picture is usually due to weak signal. Adjust
antenna or install an antenna amplifier.
DOUBLE IMAGE OR “GHOSTS”
Double images are usually caused by reflections from
tall buildings. Adjust the direction of the antenna or
raise it.
RADIO WAVE INTERFERENCE
Wavy patterns are moving on the screen, which are
usually caused by nearby radio transmitters or short-
wave receiving equipment.
HIGH TEMPERATURE ELECTROTHERMAL INTERFER-
ENCE
Diagonal or herringbone patterns appear on the
screen or part of picture is missing. This is probably
caused by high temperature electrothermal equipment
in a nearby hospital.
NOTE:If one of these symptoms appears on the screen
when input from a local cable TV company is
connected, this may be due to the local cable
company broadcast.
Troubleshooting VHF/UHF reception
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