18
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 amplifi er.
DOUBLE IMAGE OR “GHOSTS”
Double images are usually caused by refl ections from
tall buildings. Adjust the direction of the antenna or
raise it.
RADIO WAVE INTERFERENCE
Wavy patterns are moving on the screen, which are usu-
ally caused by nearby radio transmitters or short-wave
receiving equipment.
HIGH TEMPERATURE ELECTROTHERMAL INTER-
FERENCE
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 the cable from a company is connected,
this may be due to the local cable company
broadcast.
P
icture defects and countermeasures(VHF/UHF reception)
Picture defects and countermeasures (AIR reception)
Summary of Contents for TTM-2410
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