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In the 1980s, Channel Master was the only second source for General Instrument (GI)'s Videocipher II module, a building block for satellite television receivers, under a licensing agreement for which Avnet paid GI a million dollars. The Channel Master 4251, a high-performance parabolic UHF television antenna, stood about seven feet in diameter ...
He also helped found Channel Master, which became a leading producer of television antennas after Resnick invented an antenna which was inexpensive, easy to assemble and install, and did not require the expertise of a specially trained technician.
The system consists of a master antenna and a matching transformer to match the balanced antenna with unbalanced cable and amplifiers. [5] Most antennas have an impedance of around 300 Ω. To convert it to 75 Ω, a matching transformer (or balun) is used. For trunk line isolation, a resistive inductive device known as a splitter is used.
While each terrestrial channel represents a defined frequency, one or more commercial-grade receiving television antennas are used to receive the multiple channels that the cable company wishes to distribute. These antennas are often built into a single tower structure called a master antenna television structure.
An antenna rotator (or antenna rotor) is a device used to change the orientation, within the horizontal plane, of a directional antenna. Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed near the equipment which the antenna is connected to, while the rotator is mounted on the antenna ...
In 1981, United Video Satellite Group launched the first EPG service in North America, a cable channel known simply as The Electronic Program Guide.It allowed cable systems in the United States and Canada to provide on-screen listings to their subscribers 24 hours a day (displaying programming information up to 90 minutes in advance) on a dedicated cable channel.