Post away I'll try and help.
Ace!
I've copied my post from AVForums (zero replies):
"I'm hoping someone might be able to help with a digital signal issue which reared its ugly head today .
I live in a semi detached house with its own aerial (fixed to the roof). The aerial feeds one socket, in the lounge. I have a aerial cable going from the socket to a sky HD box then out to the main TV (RF1 and HDMI) and then to a second TV upstairs (RF2).
This morning when I switched the main TV on the digital signal quality was non existent - PQ was very bitty/grainy with no sound and some channels couldn't be found at all. I tried the TV upstairs which was also stuttery but not as bad as the main TV. I then wondered whether the issue was the sky box so I removed it from the equation by trying a direct feed from the master socket to the main TV. More channels after a re-tune but unfortunately PQ was still very stuttery. I then connected the same cable to the upstairs TV (it's a long 25m cable) and redid the test. After a re-tune most of the channels were ok with the exception of a couple that were still stuttery (film 4 for example).
I unscrewed the master socket and it looks fine.
Main TV signal strength is 75%, signal quality is 0%
I've owned this property for 2 years now and never had any issues previously.
Any ideas?
Main TV is a Panny VT50
Upstairs TV is a Sony 32D3000
Any reason why when connected via the sky box (RF2) the digital signal isn't lost if you pull the aerial out of the master socket?"