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Single frequency interference | Freeview Interference
Thursday 26 August 2021 6:26PM

Starting about one month ago, we can't get decent/any reception on COM5 (ARQA on your list).
We are on the Hemel Hempstead transmitter and get COM6 on C29; COM5 on C31; COM4 on C37; PSB1 on C40; PSB2 on C43; & PSB3 on C46.
The signal quality on all muxes except for COM5 is always 95%+ (Usually 100%).
The signal quality on COM5 never goes above 90% and most of the time is less than 30%. Sometimes it goes down to 0% and the picture is completely pixelated and sometimes says, "No Service".
The error rate is regularly above several 100s and sometime in the 1000s.
When this happens, I look at all the other muxes and the quality is 100%.
Surely, if there was an aerial problem, then all muxes would be affected.
We have 5 Freeview TVs in use on a wideband, signal powered aerial and they all have the same problem on COM5.
What is likey to be the problem?

Thanks in advance.

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