C-MAC

See also: CMAC (disambiguation)
The simultaneous PAL transmission of all TV-picture elements and the multiplexed transmission of the TV picture elements with D2-MAC.
Simulated MAC signal. From left to right: digital data, chrominance and luminance

C-MAC is the television technology variant approved by the European Broadcasting Union (EBU) for satellite transmissions.[1][2] The digital information is modulated using 2-4PSK (phase-shift keying), a variation of quadrature PSK where only two of the phaser angles (±90°) are used.[3]

  • The data capacity for C-MAC is 3 Mbit/s.
  • C-MAC data has to be sent to the transmitter separately from the vision.
  • The transmitter switches between FM (vision) and PSK (sound/data) modulation during each television line period.
  1. ^ RECOMMENDATION ITU-R BO.650-2 - Standards for conventional television systems for satellite broadcasting in the channels defined by Appendix 30 of the Radio Regulations (PDF). ITU. 1992. p. 5.
  2. ^ Buiting, J. (1990). "Introduction to Duobinary Encoding and Decoding" (PDF). Elektor Electronics. January 1990: 50–52.
  3. ^ Schlyter, Paul. "MAC (Multiplexed analogue components) in "Analog TV Broadcast Systems"".