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]

C-MAC variants : E-MAC

E-MAC (Extended MAC) is 16:9 version of C-MAC. Originally E-MAC was designed for 15:9 pictures, it later adopted the 16:9 aspect ratio.

Technical details

MAC transmits luminance and chrominance data separately in time rather than separately in frequency (as other analog television formats do, such as composite video).

Audio and Scrambling (selective access)

See also

TV transmission systems


  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"".