Glad to see i'm not the only person who has issue's regarding Channel 4 HD.
With working nights i'm usually home to watch a bit of Cheers then Frasier in the morning this is when i experience the most pixelation problem, as i don't watch it all day i don't know if it continues but i will get it again should i watch something during the evening.
I made a few recordings of when the pixelation happens so i could show this.
This has been happening for a while for me so decided to get a engineer booked yesterday for a visit this morning, but low and behold i never had a pixelation issue in the hours before he came or during the time he was here, could only show what i had recorded on my V6 box. He changed my wires, splitter, connections and the main splitter behind the box on the wall, checked over everything else and he said it was fine
Everything was going well until about 45 minutes ago when leaving Channel 4 HD on and it then again starts, so back to square one it seems.
When i spoke to VM yesterday when booking a engineer they did credit me with £37 on my account so that's something but it's not going to solve the issue in the long run.
I see that a close distance between the hub and the TV box can cause some interference, as you have described. This can be remedied by a mere length of cable that will allow the hub to sit at a good distance from the rest of the equipment (while it's wired to your V6), and still sit at a spot that allows it to send out WiFi with the minimal hindrance from walls, large objects, the microwave, or a fish tank, among other things.
I don't see a pattern with it I have seen it on a number of channels on 2 different boxes. I was going to see if it continued this weekend when we would watch more tv before I called up thinking it was just my home.
Have seen it happen on Sky Cinema, BBC, CH4 and more.The only true trend is they have all be HD channels and I can't think of any I don't want HD apart from the 18:30 local news on BBC1. This has been happening since Wednesday and my kids have even shouted Dad the tv is glitching again......