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Hi. For me to help you, just think of your problem and answer each question in turn. First, are you seeing the words "No Signal" or "Technical fault" on the TV screen?

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Wednesday, 17 October 2018
10:33 AM


Firstly you have too much signal as 99% will cause overload of the tuner as the received signal level varies as it does all the time. That could be causing your system to be uncertain whether it is receiving 1080p or 1080i services.

I am not aware that there is any 'switching' happening as it does not change on my system fed from Mendip.

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MikeP's 2,340 posts Platinum Platinum GB
Saturday, 20 October 2018
12:17 AM

Thanks MikeP:
I had put more or less the same question to Freeview. They say there is frequent switching from 1080p to 1080i by broadcasters within a program.

Presumably I need to reduce/attenuate the signal strength if you are right. What to, though? How do I do it? Won't this cause "bit error" problems?

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SteveK's 2 posts GB
10:41 AM

Steve K:

You can use an attenuator to reduce an overly strong signal to an acceptable level. The ideal in most cases is a strength of between 60% and 85%, that will have no effect on the 'bit error' as the system uses robust error correction algorithms that run automatically. Bit errors only really come into play when the signal is weak or distorted by interference.

You could use a variable attenuator, such as, or else fixed tyoes that are available with 3dB, 6dB and 12dB strengths but you would have to try different one starting with the lowest (3dB) one. If you do fit any of those, always add an extra flylead into the aerial socket of the TV so that the weight of the attenuator does not 'hang' on the socket as they are not designed to support their weight.

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MikeP's 2,340 posts Platinum Platinum GB
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