This should be a shaw, shaw direct, global rant! I now have shaw cable and shaw direct. Shaw Direct with 630's has given me fits with pixellation. I determined that it can happen any time but is very common and frequent on Shaw Direct, Global Vancouver, especially during simsubbing. So today I recorded golf nbc on cable, sat, global, nbc.
Turned out global sat golf was OK.
Nbc cable east, the sound was very poor. Simsub if I remember correctly.
Nbc cable west was pretty well perfect.
Global cable carrying the nbc feed with both logos was jumping at times every few seconds. Frames were missed. I believe the same garbage is what sometimes causes the sat 630's pixellation. Conclusion...the shaw/global family are their own worst enemy and really can't get there act together(to put it politely).