Multiple Channels Per Carrier (MCPC)
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Techopedia Explains Multiple Channels Per Carrier (MCPC)
Analog signals, such as those used by satellite TV and terrestrial microwave-relay communications, depend on subcarriers. MCPC technology modulates analog signals as signals with higher frequencies and bandwidth. Subcarriers are transmitted with video carrier signals on a satellite transponder at frequencies of 5.8 MHz, 6.2 MHz or 6.8 MHz with extra audio at 7 MHz or 8 MHz, as needed. These are the MCPC transmissions, and the satellites involved are known as MCPC satellites.By 2011, MCPC technology was largely replaced by digital TV, which multiplexes audio and video data as a single Moving Picture Experts Group (MPEG) transport stream. This process involves streaming multiple video signals from film, sports and news broadcasts, as well as multiplexing data as a single transport stream, which is directed to a large antenna. This antenna broadcasts the stream to a TV with an Advanced Television Systems Committee (ATSC) tuner that receives and decodes signals for screen display.
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