dish tv t1020 pixalization issues


got myself a t1020,

but I'm finding the image is pixalizing &/or freezing &/or skipping frequently on all muxes.

the aerial setup for my area (wgtn) is horizontal by default. (i.e. i can pick up prime etc via loop out to the TV)
& the t1020 info page suggest the signal strength is approx 90~95% (but frequently dipping to approx 50~60%) with signal quality relatively constant at 85%


to combat the pixalization on the t1020, I've needed to reverse the polarity of the aerial (i.e. set it vertical instead.) so the signal strength is now only approx 40~50% (but it is relatively steady at these %s) with signal quality remaining relatively constant at 80%.


this fix works, but isn't ideal as, in very strong wind & rain, the kordia mux is still subject to pixalization AND now i can't pick up prime etc via loop out to the TV.

if i get a splitter (so i don't use the loop out), would the signal degrade significantly that the signal strength would no longer fluctuate so wildly?

additional info:
signal is also currently boosted with an indoor amp.

i didn't have this issue with my old freeview stb.

short to buying a new aerial,
any other constructive suggestions would be appreciated.

also i'm finding the audio & image are out by a fraction of a second.