View Full Version : "Major" and "Minor" fields
10-31-2005, 09:39 PM
Would anyone know what the "Major" and "Minor" "Physical" fields are for within the Admin screens, within the "Editting Channel Line Up" screens..... ?
10-31-2005, 11:45 PM
Each digital channel resides on an OPEN frequency set, usually set aside as a sort of safeway tot not cause interference. These frequencies make up a certain "channel", just as you would turn to on a TV. Actually, if I turn to Ch. 34 for instance at home on analog, I get a very scrambled looking static signal (the digital signal). This signal is comprised of what is called a transport stream. Each physical channel, say 34 or in my case D-CBS can cary up to 6 digital streams, one HD and the other 5 SD. Most channels have only one signal. At all times, even if the data is non existen a transport stream occupies 19.524 Mbps of bandwidth, even though most HD shows take about 7-8 Mbps, and SD 1-3 Mbps. The rest, if not used is open and filled with zeros. Anyway, the digital channels were assigned a major channel (the network) and a minor channel (the individual stream. For example I have the following channels comprising my local CBS network:
BTV 1091 Physical 34 Major 9 Minor 1 Network CBS Stream HD Main
BTV 1092 Physical 34 Major 9 Minor 2 Network CBS Stream WUSA LIVE radar
In the non computer world, they would be read as 9.1 DWUSA and 9.2 WUSAWX respectively. I hope that answers your question.
PS: Watch Threshold 9 PM EST Friday's on CBS!
11-02-2005, 05:11 PM
Wxboy... thank you very much for taking the time to describe the broadcast technology...I appreciate it and you saved me much time....
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