Automatic RF leveling in passenger aircraft video distribution system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 15, 1993
Grant Date -
N/A
app pub date -
Apr 8, 1991
filing date -
Apr 8, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A passenger aircraft video distribution system distributes modulated RF signals provided from a central signal source to be used at each passenger seat. The RF signals are distributed by means of various RF components, including amplifiers (90, 14a, 164, 24a, 24b, 34a), taps (180, 210) and splitters (108, 182, 214). In order to ensure proper RF levels for best tuner operation, each of a number of stations in the distribution system is provided with a variable gain amplifier (90, 14a, 164, 24a, 24b, 34a) controllable by a microprocessor (92, 50a, 220, 52a, 56a, 216). A separate service line (222, 224, 226, 228, 230, 232, 234) enables a central microprocessor to monitor RF levels at different stations to automatically provide, via the same service line, appropriate gain control signals to obtain proper RF levels. The monitored RF levels are also employed for diagnostic purposes.
First Claim
Family
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Cited Art Landscape
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