WP
I don't think it was a case of technology improving overnight on January 1st 1993 though. The 'clunk' in TV-am days was a man (either at BT or the transmitter) changing the position of a mechanical switch at 0925; after TV-am this switch was no longer necessary as GMTV passed through the same line as the rest of the day's ITV output.
(Hence why UTV were able to make an unauthorised opt-out.)
Re. The 'clunk'. It's worth remembering that TV technology has changed a lot since the days of Thames and TVam. Then any crude switching would have been done with analogue signals. Doing the same with SDI or an ASI stream just doesn't look as messy even on the simplest of routers (especially when done in the black as the 9:25 one is).
Also in the digital days they wouldn't switch the feed directly into the transmitter, it's into professional kit that's encoding and multiplexing the channel with others. That will be able to handle and smooth out the disturbance
Also in the digital days they wouldn't switch the feed directly into the transmitter, it's into professional kit that's encoding and multiplexing the channel with others. That will be able to handle and smooth out the disturbance
I don't think it was a case of technology improving overnight on January 1st 1993 though. The 'clunk' in TV-am days was a man (either at BT or the transmitter) changing the position of a mechanical switch at 0925; after TV-am this switch was no longer necessary as GMTV passed through the same line as the rest of the day's ITV output.
(Hence why UTV were able to make an unauthorised opt-out.)