I just got my Sammy HLN507W and my Dish 921 hooked up on Wed. I am able to pick up the Baltimore digital stations almost perfectly, but for DC, nada. This is interesting, because I am in Laurel and the DC stations are somewhat closer. According to the 2150 website, most of the DC stations are just under 15 miles to the SW, and the Balt. stations are over 20 miles to the NE.
When I try to tune a DC station the signal strength meter goes from 0 to around 65-70, then immediately changes from locked to unlocked and drops back to zero, all within less than a second. It repeats this cycle over and over. It doesn't seem to matter which station. I am able to pick up their analog brethren OK though.
I'm guessing this might well have something to do with antenna placement as I have a Terk TV44 mounted on my dish on the back (north) side of the house and the peak of my roof is between it and DC. But there are so many other potential causes; e.g. the antenna itself, the signal strength of the stations, and the tuner in my 921 to name a few, I'd like to eliminate as many as possible before spending any more money (or climbing around on my roof in this weather).
Does anyone have any thoughts, suggestions? I have already tried putting an amplifed RS antenna in my front window, but that doesn't seem to make a difference.