Apparatus and method for tamper resistant channel attenuation in subscription television converter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 25, 1981
Grant Date -
N/A
app pub date -
May 25, 1979
filing date -
May 25, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tamper resistant subscription television converter is made by connecting a bandstop filter in the Radio Frequency circuit of the converter. The filter, for attenuating one or more preselected subscription television channels is connected in series at a location in the Radio Frequency circuit such that tampering with it would affect the converter's alignment. The filter is tuned to obtain maximum attenuation of the preselected channels and the converter is aligned for proper reception of the remaining channels. Any attempt to disable the attenuator results in unacceptable reception of all channels. A preferred bandstop filter is a constant K, T section L-C filter.
First Claim
Family
International Classification(s)
Cited Art Landscape
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