CCIR System E is an analog broadcast television system used in France and Monaco, associated with monochrome 819-line high resolution broadcasts. Transmissions started in 1949 and ended in 1985.
System E specifications Some of the important specs are listed below:Reference Data for Radio Engineers, ITT Howard W.Sams Co., New York, 1977, section 30 Frame rate: 25 Hz Interlace: 2/1 Field rate: 50 Hz Lines/frame: 819 Line rate: 20.475 kHz Visual bandwidth: 10 MHz Vision modulation: Positive Preemphasis: none Sound modulation: AM Sound offset: +11.15 MHz on odd numbered channels, -11.15 MHz on even numbered channels Channel bandwidth: 14 MHz
System E implementation provided very good (near HDTV) picture quality but with an uneconomical use of bandwidth. With the usual additions of sound carrier and vestigial sideband the result was a combined signal that demanded approximately two to three times the bandwidth of more moderately specified standards, even when colour was added to them (as the color subcarrier resides within the Luma signal space).
For this reason, France gradually abandoned it in favor of the 625-lines standard, implementing System L with SECAM color.
The final 819-line transmissions in Metropolitan France took place in Paris, from the Eiffel Tower, on 19 July 1983. TMC in Monaco were the last broadcasters to transmit 819-line television, closing down their System E transmitter in 1985.
Television channels were arranged as follows: Ch Picture (MHz) Sound (MHz) F2 52.40 41.25 F4 65.55 54.40 F5 164.00 175.15 F6 173.40 162.25 F7 177.15 188.30 F8 186.55 175.40 F8a 185.25 174.10 F9 190.30 201.45 F10 199.70 188.55 F11 203.45 214.60 F12 212.85 201.70
See also CCIR System F Broadcast television systems Television transmitter Transposer
Notes and references
External links World Analogue Television Standards and Waveforms