Signal intensity
Signal intensity
The units you're seeing are in dBm, which is a logarithmic scale. Higher values don't always mean stronger; they indicate greater distance or weaker reception. Negative values reflect signal strength relative to a reference point, so lower numbers mean better strength.
A greater dB value indicates stronger output than a lower one (including variations). 10dB surpasses 0dB; 0db exceeds -10dB, and so on. Decibels operate on a logarithmic scale: actual power equals 10 raised to the dB divided by ten. Negative figures simply result in reduced intensity.