I have a Pace digibox linked into a Pioneer 812 receiver, and in most surround modes I hear slight interference behind voices on the speakers. Sounds a bit like a quiet, squwelchy echo. I am confident it is not poor quality leads / receiver fault etc, and the receiver supplier says that it is probably artefacts carried by the SKY signal. Signal quality and strength varies between 50% - 60%, and I live in North Wales. Any thoughts whether having the dish checked / realigned may remove the problem ?