12th April 2007 at 16:48
#38402
pix
Guest
Hi Sabir,
sorry for the late reply.
by substracting two powers, you obtain a delta of power.
And a “delta” is an attenuation…
dBm – dBm = dB
that’s correct.
a dB is a difference (or “delta”) between two powers expressed in dBm. Maybe you should refer to wikipedia if you want a more mathematical approach of this…