Signal Power measurement on air - steady and in mobility with SDR receivers

Recently I raised a question how to measure the power received from an SDR receiver .

Ham use S-meter scale , while for professional use a scale in logarithmic units ( dBm , dBuV , dBuV/m)is required . Conversion is mathematically easy .

Most of the software have both S-Meter and dBm or dBm(r) where (r) stands for relative . 

Some software use different settings depending on the type of modulation of signal that they have to measure and demodulate , while some other no .

Some software give steady measurements , independently from modulation , some other no .

I have made a series of video showing the reasons why .

I have choose three kind of modulations : WBFM ( used in the 87.5-108 MHz Broadcasting Band) , DAB and the old AM used in Medium Waves .