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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.
A SMATV headend is used to receive and rebroadcast satellite television channels throughout a property from a single satellite feed. [4] 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.
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.
The Pan-American television frequencies are different for terrestrial and cable television systems. Terrestrial television channels are divided into two bands: the VHF band which comprises channels 2 through 13 and occupies frequencies between 54 and 216 MHz, and the UHF band, which comprises channels 14 through 36 and occupies frequencies between 470 and 608 MHz.
The UHF band contains 55 channels from 14 to 69, which excludes channel 37 in the U.S. Channels 52 to 69 are unavailable for digital TV, on a permanent basis, leaving only 37 channels. Stations generally try to choose a lower frequency, which causes some crowding and therefore election conflicts on the lowest channels.