The most common types of television interference are
as following:
SNOWY PICTURE
Snowy picture is usually caused due to weak signal.
Adjust antenna or install an antenna amplifier.
DOUBLE IMAGES OR
“
GHOSTS
”
Double images are usually caused by reflections from
tall buildings. Adjust the direction of the antenna or
raise it.
RADIO WAVE INTERFERENCE
W ave pattern are moving on the screen, which are
usually caused by nearby radio transmitter or shot-
wave receiving equipment.
HIGH TEMPERATURE ELECTROTHERMAL INTER-
FERENCE
Diagonal, or herring-bone, patterns appear on the
screen or part of picture is missing. This is probably
caused by high temperature electrothermal equipment
in the nearby hospital.
NOTE: If one of these symptoms appears on the screen when the cable from a
company is connected, this may be due to the local cable company broadcast.
Picture defects and countermeasures
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