I've been having some problems since the and wondered if anyone could comment on the nature of the interference.

Originally, the problem was seen with an old CRT screen TV and a Freeview set top box, but that was all chenged to a new set up to try and resolve the issue.

The set up is now a brand new Panasonic LED TV with a tuner. The has recently been checked/realigned and new double screened fitted - no or other amplifier is used. A masthead UHF bandpass filter is fitted. All Freeview muxes broadcast from (Ch 22, 25, 28, 30, 53, 60) give a good signal at the TV and the normal and sound are outstanding.

At various times, which can last for hours, and seems to be random during the day and night, interference is seen with picture and sound break up and sometimes the '' display on the TV. This occurs on all except those on CH53 and CH60.

If I tune a portable FM radio off (to say 90.00MHz), the interference can be heard as a cyclic burst of noise that occurs at a of just over 1 Hz - I have recorded the audio and the main noise burst lasts for approximately 0.2 seconds in each second.

When the interference stops on the TV, the noise signal on the FM radio disappears and the picture and sound return to normal.

Can anyone shed some light?

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Freeview intermittent interference | Freeview Interference
Monday 5 December 2011 12:39PM

Dave - thanks for that.

I don't think that is what I'm experiencing, as it seems much faster than my 1 Hz stuff.

If you are interested, I did start a post at avforums and have uploaded the audio file and audio trace to demonstrate what you get from the FM radio.

Freeview Interference | AVForums.com - UK Online

Thanks again for your reply!

P.S. I've always been amazed that those ethernet home plugs are allowed, having spent 25 years in manufacturing trying to ensure things are clean on the supply.

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