yes, quality is down to how the receiver renders the image. my zgemma looks slightly blurred compared to my octagon sx88 - signal strength always roughly the same in DB (decibels) on both. im actually thinking about ditching the zgemma H7s - i only bought it for the 3 tuners, now theres not much need for a dvb-c cable tuner. it doesnt remove channels when you run a channel scan, very irritating.Picture quality has nothing to do with LNB. I mean, if you have acceptable signal level, the quality of the picture will be the same.