Hi Guys, every receiver manufacture using different main CPU chip (Solution), tuners and their own source codes to mapping their software, key things for a good receiver is its tuner! Tuner sensitivity these days are well made, Traxis DBS 4000 are happen to use the best Sharp tuner, its sensitivity is -129dB.
From tuner signal comes in engineer use I2C + AGC to mapping percentage reading which is what you see in OSD the S/Q & S/Strength, every engineer has its own calculation table, some use pure linearity, some use enhanced AGC so the results of what is getting various by brands, to be fair to judge performance do not just compare these numbers, when LNB is side-by-side compare if base on same receiver, same dish, same length of cable, same time frame with maximize skew and focal depth adjustment, the result is trust worthy!