Editing Subcarrier (section)

==MCPC satellites==
[[Analog television|Analog]] [[satellite television]] and terrestrial analog [[microwave]] [[relay]] communications rely on subcarriers transmitted with the video carrier on a satellite [[transponder]] or microwave channel for the audio channels of a video feed. There are usually at frequencies of 5.8, 6.2, or 6.8&nbsp;MHz (the video carrier usually resides below 5&nbsp;MHz on a satellite transponder or microwave relay). Extra subcarriers are sometimes transmitted at around 7 or 8&nbsp;MHz for extra audio (such as radio stations) or low-to-medium-speed data. This is referred to as [[multiple channel per carrier]] (MCPC).

This is now mostly superseded by [[digital TV]] (usually [[DVB-S]], [[DVB-S2]] or another [[MPEG-2]]-based system), where audio and video data are packaged together ([[multiplexing|multiplex]]ed) in a single [[MPEG transport stream]].