I've been having some interference problems since the DSO 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 Freeview HD tuner. The aerial has recently been checked/realigned and new double screened cable fitted - no masthead amplifier or other amplifier is used. A masthead UHF bandpass filter is fitted. All Freeview muxes broadcast from Belmont (Ch 22, 25, 28, 30, 53, 60) give a good signal at the TV and the normal picture and sound quality 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 'no signal' display on the TV. If I tune a portable FM radio off station (to say 90.00MHz), the interference can be heard as a cyclic burst of noise that occurs at a frequency 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. I have tried to report this problem to the BBC, as they have taken over from Ofcom for RFI reports, but they seem to be disinterested, even though they recently reported that the case was to be escalated. Can anyone shed some light?