Weak TV Signal on some recordings

[bros]

I keep getting Weak TV Signal on some recordings - and it will go all pixelated. Sometimes it is a channel like AMC, other times it is a local channel like CBS/ABC/NBC - it's annoying when it is a few seconds, let alone a few minutes, like it was on a recording yesterday!

I have WMC record to a 1 TB HDD, I use a 3 tuner Hauppage that connects via USB. The amount of tuners being used does not matter for pixelation, during a recording yesterday, the only tuner being used was the one used to record the program.