My answer is for the US: Yes it’s basically true. It’s also technical and difficult to explain. I’ve been in radio a long time and my eyes glaze over when an engineer tries to explain it to me. But I’ll give it a go, if you promise not to hold it against me if I don’t […]
Written on Thursday, July 10th, 2008 by vanmerrill :: 0 comments to this post
My answer is for the US:
Yes it’s basically true. It’s also technical and difficult to explain. I’ve been in radio a long time and my eyes glaze over when an engineer tries to explain it to me. But I’ll give it a go, if you promise not to hold it against me if I don’t get it exactly right.
Every frequency is a certain width (for our purposes). The main channel that a station uses does not use all of the width available to them, so there are “sub channels” or “side channels” that are there, but mostly unused by the station.
By using those extra channels on their same frequency, they can offer different programming without infringing on someone else’s channel.
So, let’s say your favorite station is at 99.5 and they play Metal. The station might actually have the rights to the frequencies between 99.45 - 99.65 and could use its side channels to play Country at 99.55 or Hip-Hop at 99.57 (again this is for our un-technical purposes).
But you do need a special radio to pick up the side channels. These side channels are also programmed to be of better quality than regular old radio and stereo, so there is also that benefit.
Hope that helps, wrote it myself, didn’t use Wiki ;
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