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Firstly, let me say I have no technical knowledge at all. However, I installed a new IDTV a month ago and managed to tune in to all channels, a week later channel 5, channel 4 and 2 other channels had gone.
After reading an article (forget where) I ensured that the aerial cable to the TV was clean, ie hadn't been re-routed to other TV's etc, the channels came back.
This left the question as to why had I lost the channesl in the first place, after further research on the web it transpired that the digital signal is one fussy bugger, unlike an analogue picture that just gets progressively worse as reception weakens, the digital picture can just fall over a cliff and it's gone as reception weakens.
There is a great thread on here some where that will explain all, hope it helps,
Wayne
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