My ITV/C4 Freeview channels have disappeared - what can I do? Is it my SCART ca
It is a feature of television signals that they can be effected by the weather. Aside from the obvious damaged that can be caused by wind or torrential rain, the onset of summer can cause a more intriguing problem called "inversion".
Basically, when the sun heats up the land, the hot air can get trapped below cold air at high level. This creates an "inversion layer" which acts like a polished mirror to TV signals. This causes two problems: you can receive both the original and a reflected signal from your own transmitter (on analogue TV this appears as "ghosting") or interference from TV transmitters that are normally too far distant.
The ITV/C4 multiplex of channels (ITV-1, ITV-2, ITV-3, ITV-4, CITV, C4, More4, E4, Quizcall) use a transmission "mode" called 64QAM, and it is sadly much more prone to these problems.
So, whilst a loft-mounted aerial will provide reception at some time, it will fail at others. The only real solution is to mount the aerial (or a new Class I aerial) outside on a pole, but some people report that changing the cable from the aerial to the set-top box to the high-grade satellite cable can also help.
The SCART connection, by the way, only carries a single TV picture, not the Freeview transmission multiplexes, so if this is disconnected it will result in degradation to every channel at once.
I lost all my Freeview channels , the other day, virgin media, had a few problems but that came back on but for some reason all my Freeview has disappeared :-( I have tried to retune etc turned tv off for so long contacted virgin they say should not affect Freeview, TV is fine so why should Freeview vanish? help I watch the Craft channels on there,
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s worden: Retuning whilst you had a problem was a bad idea as you've now deleted all your channels which were tuned correctly leaving you with no way of knowing when the problem is fixed. Check all your cables and connectors between the TV and the aerial (as far as those which you can safely access) as the most likely explanation is that something is loose/disconnected or damaged.
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