Morning Tec0,
I did try earthing the decoder but it did not help the situation.
The puzzling thing is that the old style decoder works a charm, but the newer (also old now) PVR 2P decoder loses its signal.
Its certainly nothing to do with the dish or any of the cabling as the older decoder doesn't lose signal even for a second.
The older decoder also does not have an earth lead attached to it at all. It has a standard figure of eight 2 wire supply cable with no adapter in the mains lead. So a straight 230V is supplied to the decoder and no earth at all. I assume it picks an earth up from the satellite cabling? Although if the dish isn't earthed i would have no idea where this earth comes from either??
I have not done a loop test on the installation so i cannot tell you how good the supply earth is, but that really should not matter in the slightest to the dstv signal, as when it's running on mains there is no problem with the signal...and the fact that the older decoder doesn't skip a beat...
I can only assume the square wave is outputting an interference (which is totally plausible), although why it affects the PVR and not the older decoder baffles me. Surely they make these pieces of equipment a bit more robust, especially nowadays when nearly every piece of electronic equipment we have either has wifi and sends and receives signals, or gives off at least some interference...?
Anyhow, i know from another install, as mentioned, that bthe Explora does not have this issue, so when the client returns from holiday, I'll reconnect and post back here the results (which i am pretty certain will be favourable).