Why do we have radio stations when there arent enough TV channels?
A multiplex isnt normally completely filled by having 4 channels on it. There is usually some space left over. Radio stations are considerably smaller than a TV station, so much so that around 10 radio stations can fit in the space of one normal channel. A normal channel uses around 2000Kb of data per second, whereas a radio station uses 192Kb per second. There is also a little extra space on MUX B, but that is taken up by BBC Parliament. BBC Parliament is transmit in quarter screen — which takes up just less than half the space of a full screen channel — making it around the same space as 5 radio stations. So to summarise, even if we got rid of all the radio stations, we still wouldnt be able to fit another TV channel in.
