No, we don't have a loft, the house was built with rooms in the roof space. All of the cables terminate to a cupboard under the stairs which is where the DA is situated.The DA is mains powered from a socket in the loft (if I remember correctly).
Why it cuts out when there have been power outages is anyone's guess.
Whether the whole device or just the masthead 12V out from it, ditto? The plan to have a separate 12V supply may diagnose which?
Yes, good idea, except that the problem is not so much with live TV, but with recordings. We have a server that does our TV recordings. and we need to trust that it will work, as we could go a few days without watching any live TV and not know that the signal has disappeared.I'd probably have fitted a smart or wireless mains socket to power off and on the DA for when this lockup occurs if I had a similar problem as I have a few lying around.
Good to know - thanks!Aerial adaptors will introduce a potential impedance mismatch and a tiny insertion loss. In practice neither is likely to give problems. But the signal level is not your problem so some loss would not harm reception.
But the variable attenuator that I added in to the system made no differenceYou have too much amplification and that allows distant co-channel interference to distort the wanted, courtesy of the lack of antenna directivity.
Because it is after the culprit amplifier within the omnidirectional amplified aerial. Garbage in = garbage out, just at at differing levels.But the variable attenuator that I added in to the system made no difference
Yes, I appreciate that, but changing the aerial is not really on the list of options at the moment, so I'm trying to do what I can with the one I have.Because it is after the culprit amplifier within the omnidirectional amplified aerial. Garbage in = garbage out, just at at differing levels.
This is why a directional aerial is used to maximise the wanted and reduce unwanted signals via the polar gain curve.
I have tried that as I only have one wall plate in the room where the server is , and I have multiple tuners to feed. I use an active splitter (one of the Proception ones actually that you linked to earlier, a 4 way one). So, I took that out to test and added in a passive splitter, and the signal was worse rather than better. This was using the signal information on the Sony TV in that room, with the quality / strength signal meters and the error rate readings.When you install the 12V masthead supply test to see if the server PVR tuners can be fed direct (albeit one at a time initially to measure level and quality on every frequency).
Next try passive splitting rather than active/amplified, two ways -4dB, four ways -8dB. Then use the DA to feed the TVs via an output from the passive splits?
That we can rule out. The distribution amp is in a cupboard under the stairs on the ground floor. The server is in one of the bedrooms on the 2nd floor.Consider relocating the psu as far away from the server kit as you can. I'm suspecting a possibility of computer hash on earthy coaxes might be triggering something? Difficult to prove, naturally.