Does the toppy have a problem with mux 2? Most nights I get varying degrees of picture and sound break up on the mux 2 channels, sometimes it's watchable sometimes unwatchable. I don't have any problems with my other pvr (a sagem) which has no problems with the channels on mux 2. Is the tuner in the toppy not as good as the sagem one or is this a known fault?

Is your Toppy connected in the same way as the Sagem? It could be poor cabling to the Toppy.

The two boxes are connected to the arial as follows:

Arial into signal booster

Two way splitter out from the booster

One lead going to the toppy

2nd lead going to another booster and then into the sagem.