Picture defects and countermeasures, Snowy Picture

Picture defects and countermeasures

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

Wave 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.