"Telstar Electronics" wrote in message
ups.com...
Go to the S21 function. Your S21 power is read in dB...

That would be "dBm" I think. Logarithmic power measurements have to be
referred to some reference power lever since dB is the logarithm of a ratio.
The one I see most often is dB above 1 milliwatt.

Also "S21" is a voltage transmission coefficient in the "scattering
parameter matrix" characterizing a 2-port network.

--
Regards,
Leland C. Scott
KC8LDO