Hi All,
Background =========== I have a little bit of RF and electronics experience and I was called to my friends house to help fix the HDTV signal problems on ABC(HD). The complaint was poor signal or no signal and some pixelation (spelling). [I'm no TV expert].
How could ABC(HD) be poor and the other HD channels and SD channels be OK? Hmmm I said.
When I turn on the VCR and or the DVD player etc the pixelation got worse , but most significantly on ABC(HD). Ahhhh I said, it must be the switch mode power supplies causing interference.
The problem had recently occurred over the last few months.
- Setup External Analog TV antenna and 2way splitter to another room (all HDTV signals good in the other room)
Connection ======== The setup had a Belkin surge protector that protected the RF and mains power.
Hence the antenna RF signal when through the surge protector (probably arrestor inside).
Theory ======== I thought that since the interference was worse with other power devices on... I suspected that the RF surge arestor must be coupling noise/interference in to the RF of the HDTV TV set.
Removing /bypassing the RF surge protection ..... all signals including the ABC(HD) GOOD ! ;-)
==> Problem Solved