i dont think its a receiver issues, drake made the best damn receiver out there
Drake was a very good receiver back in the day. But the Chaparral Monterey had adjustable bandwidth from 14-36 mhz and low and or high side TI filters. That allowed the best tuning to any signal on the arc. You could drop the bandwidth for weak stations and really clean them up and run the feeds at 36 mhz for fantasic analog video. I loved my Monty, only cost me $1500.00 in 91 without the VC-2.
If the stations on the 4dtv digital have enough signal to have some headroom above threshold that you want to watch you'll be good to go. To really see how well you dish is tuned will be in the ability to have high quality numbers on the HBO's on G1... 24/7/365.
Good Satellite Viewing