Sky/Terrestrial Delay

JV

James Vertigan Founding member 5 October 2004 2:24pm

I wold've thought with Fox being a Capital group station that they'd get a direct feed sent from Leicester Square (a clean one obviously!) and the same with the other Capital stations that take Hit40UK, but maybe not.

IS

Inspector Sands 5 October 2004 2:32pm

James Vertigan posted:

I wold've thought with Fox being a Capital group station that they'd get a direct feed sent from Leicester Square (a clean one obviously!) and the same with the other Capital stations that take Hit40UK, but maybe not.

They get the clean version just like every other station. Remember that the chart comes from a studio at Capital, but it isn't a Capital programme

IS

Inspector Sands 5 October 2004 2:33pm

MrStrawsonsSheep posted:

Steve in Pudsey posted:

It should be the case that 5Live on DSat is the same as MW - the MW transmission goes through a delay stage so that it's in synch with the satellite transmission so that if a transmitter loses its feed it can fail to the digibox backup without causing problems in the overlap areas where there are two transmitters on the same frequency.

Not having been mativated enough to test it, I've seen suggestions that C4 do much the same, for the same reasons.

Not the same reasons as Channel 4 doesn't have a synchronous transmitter network like Five Live (using 2 frequencies to cover the whole country)

SD

Steve D 5 October 2004 3:11pm

TVDragon posted:

Steve D posted:

No, the 'click' - which is only on the analogue chain - is because after closedown the analogue chain is switched to sustain on the analogue network feed from London. This is the only time BBC Wales viewers get a feed of analogue network, as from 6am until closedown both transmission chains sustain on the digital network.

Both the analogue and digital signal paths ALWAYS go via Cardiff. Even after closedown the network feeds of both digital and analogue networks come from TVC to BH Cardiff, from where they're distributed to the transmitter chain via Wenvoe, or in the case of DSat back to TVC and on to the uplink.

During the day, because digital and analogue chains are sustained from the same network, you don't get a 'click' on the analogue chain when the Cardiff pres suite goes out of circuit - in fact it's seamless.

I've read that about eight times and I now understand it -- ta for that.

The first bit is what I was meaning, but was far too rubbish to know how to express.

Yes, sorry. I'm renowned for my clear and concise explanations!

I'm quite used to people glazing over and snoring when I start on subjects like this.

(October 2004)