Minstrel SE - 12 hours ago »
Yes it was interesting when I hooked up another box the signal strength was on a different scale. One box read 38% to 58% and the Humax was reading in the 78% area.
Nothing unusual here the signal strength shown as a percentage is not an absolute mesurement, unlike dBW or microvolts at the antenna input.
Each manufacturer will have its own idea of what is 100%, based on their tuner 'front end' circuitry. If I measure signal strength on my Freeview devices i.e.Sony, Sharpe, and Humax, I get different results for each. As has been stated before Humax appear to prefer an indicated signal strength between 60 - 80%.
Signal quality measurement is another question altogether.