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Something to consider with ATSC signals -- RF Signal strength doesn't necissarily translate to better reception. I'm only 10 miles from the transmitter field, so I get clear, strong signals. What kills my ATSC reception is the reflections I get off of the downtown buildings just 3 miles NE to me. ATSC is terrible at filtering out interference of any kind. It wants a perfect clean RF signal -- not ghosty, staticy, or other anomolies we were so used to getting with analog transmissions -- or it will refuse to extract the A/V it contains. Fussy fussy fussy.
What really annoys me is that ATSC tuners, TVs and Converter boxes alike, tend to show their signal stringth diagnostic infomration based on something OTHER than true RF strength or the noise figure. I can't determine what they're actually measuring to get that strength display. Just by moving an antenna a couple of inches I can go from 22->66->22 alternating to solid 71-75 on my Sony XBR 32". I can't imagine there's that much change in the RF domain. In the digital domain, what is it measuring to get that 22->66->22 jump
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