[Tonycavan]

Reception issue:
My OAP neighbours have just got a new smart TV , Antenna and cabling. Antenna guy has been out to them a few times checking testing and rechecking his work confirming all on his end is really good.
Problem is they are still having pixelation. He has tried many different methods including amplifier disconnecting old cabling to other tv points etc.
Thoughts are it’s maybe an interference issue from something electrical. I have switched off and pulled out all electrical fuses other than tv one. Glitching still happens. What’s not off is a fridge and an alarm system. But both of these have been switched off previously and glitching still happened.
Glitching mainly happens from 6pm onwards. – I have noticed that my AM radio loses reception when driving into their driveway directly opposite a street light. The power providers own the light and say they can’t justify spending tax payers money to check the light until all other possible sources eliminated. What else can I do/ is it even possible the light is causing it? What test instruments will help locate the interference?
Apologies for the long winded post I just wanted to mention what has been tried already. Sparky here btw.