Hitachi 31CX5B Operating Manual page 53

RECEPTION PROBLEM5
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• IGNITION NOISE:
Black spots or horizontal streaks may appear, picture may flutter or drift. Usually
caused by interference from automobile ignition systems, neon lamps, electrical
drills and other electrical appliances.
• GHOSTS:
Ghosts are caused by the television signal following two paths. One is the direct
path and the other is reflected from tall buildings, hills or other objects. Changing
the direction or position of the antenna may improve reception. Ghosting may also
be caused by defects in the antenna system such as unshielded lead or connecting
several sets to the same antenna without using multiple antenna couplers.
• SNOW:
If your receiver is located in the fringe area of a television station where the signal
is weak, your picture may be marred by the appearance of small dots. When the
signal is extremely weak, it may be necessary to install a special antenna to improve
the picture.
• RADIO FREQUENCY INTERFERENCE
The interference produces moving ripples or diagonal streaks, and in some cases,
causes loss of contrast in the picture.
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