The reason I ask is that I had the 1000.4 and for some reason about six or so channels would have a difficult time locking in when I was surfing. It always was the same channels, 182, 183, 184 and I believe 111, 118 ;etc. After an error message and a wait of 30 sec. to a couple minutes, they would usually appear. Sometimes thought they wouldn't come on line at all.Otherwise my picture quality couldn't have been better across the board. I have a Panasonic TH-42PZ85U and VIP722. They replaced my 1000.4 with two 500's and now the channels come up OK but my picture quality has been downgraded on the SD channels. My signal strength is 75 on 61.5 and around 70 on 110 and 119.
Ron