Scientific-atlanta, Inc.

Munther A Al-Khalil

Leo J Thompson

Catherine W Jelinek

Herman A Kruse

Scott R Siclari

A cable television system employs two-way communication between a headend and at least one subscriber terminal. The two-way communication is provided by having separate frequency bands for each communication path. The frequency bands do not overlap and the higher frequency band is used for subscriber terminal to headend transmissions. A line amplifier is provided that employs two diplex filters each connected to both a forward and reverse amplifier. The high pass portions of the diplex filters are formed from both lumped and distributed components.

Bi-directional cable television system including a UHF filter

A combination surge and diplex filter is provided for a CATV distribution amplifier. In a first preferred implementation, an integrated surge and high pass filter section is provided when the CATV amplifier is used only in the forward direction. Provision is made for a plug-in low pass filter section which is matched to the high pass filter section. The plug-in low pass section is used to form a diplex filter if the reverse direction capability of the CATV system is required from the distribution amplifier. In a second preferred implementation, the integrated surge and high pass filter section is segmented into a surge filter segment which is designed as a divisible part of the high pass filter section. A plug-in module is then provided with a high pass filter segment having those components of the high pass filter section which were not necessary for surge protection and a low pass filter section matched to the high pass filter section. The plug-in module is utilized to form a diplex filter, if the reverse direction capability of the CATV system is required from the distribution amplifier.

Combination surge and diplex filter for CATV distribution systems

A plug and socket form a simple and compact electrical connector for selectively distributing an electrical signal along different paths. The plug and socket are symmetrically arranged so that they are engageable with each other in different positions to achieve different electrical connections. The electrical connector saves printed circuit board space, minimizes parts, and improves switching flexibility in an RF signal amplification device for amplifying an RF (e.g., CATV) signal transmitted along an RF cable, and in a power coupler for coupling an AC power signal into an RF cable.

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Norcross, GA, United States of America

Munther A Al-Khalil