Reception Disturbances - Zenith TVBR1322Z Operating Manual

Reception Disturbances

Most types of television interference can be remedied by adjusting the height and position of the
VHF/UHF antenna. Outdoor antennas are recommended for best results. The most common types of
television interference are shown. If one of these symptoms appear when the TV/VCR is connected
to a cable TV system, the disturbance may be caused by the local cable TV company broadcast.
Ignition
Black spots or horizontal streaks may appear, the picture may flutter or drift. Usually caused by
interference from automobile ignition systems, neon lamps, or AC powered tools and appliances
such as drills or hair dryers.
Ghosts
Ghosts are caused by the television signal following two paths. One is the direct path and the
other is reflected by tall buildings, hills or other large objects. Changing the direction or position
of the antenna may improve the reception.
Snow
If the TV/VCR is located far from the TV station, in a fringe area where the signal is weak, small
dots may appear in the picture. If the signal is extremely weak, the installation of a larger exter-
nal antenna may be necessary.
Radio Frequency Interference (RFI)
Caused by two-way radios, this type of interference produces moving ripples or diagonal streaks
in the picture. Some cases may cause a loss of contrast in the picture. Changing the direction
and position of the antenna or installing an RFI filter may improve the picture.
Picture Size Variation
A slight picture size variation is normal when you adjust the CONTRAST or BRIGHTNESS options in
the PICTURE menu.
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