Logarithmic scales are devilish things, though. Spurious emissions have to be at least 20dB down from the carrier, which means a factor of 100. And I'm highly

Logarithmic scales are devilish things, though. Spurious emissions have to be at least 20dB down from the carrier, which means a factor of 100. And I'm highly skeptical that you can measure a 1% difference in wifi signal strength by looking at something like performance alone, given all the counfounding factors.