Since none of us knows exactly how the various signal level indicators across the Dish receivers are calibrated or what exactly they are taking into account for the measure... it may not be reasonable to even assume that a 0-125 scale on one receiver means the same as a 0-125 scale on another receiver. I know it might seem like it ought to... but this isn't like measuring height with a ruler where an inch is always an inch... I doubt any of the Dish receivers (except possibly ones in the same series like 501/508) share any direct reasonably correlation. So... if you are seeing 110 on your 510 receiver for a given transponder... and 100 on your 622 for that same transponder... even if both scales are 0-125... there is not a concrete reason to assume the 622 is seeing 10% lower signal. Both receivers could in fact be seeing the same level of signal, but each meter's scale is not calibrated to the same degree. Bottom line... there is not really a way to compare different receivers like you might want to. You could take your 510 receiver and move it to another room, and if you get lower signal in one room than another that would tell you something... but comparing different model receivers really doesn't seem to tell you anything relative to the amount of signal getting to receiver A vs receiver B.