Good point, the 'milliwatt' part of 'dBm' takes the E^2/R part out of the math. If we were speaking of dBv/Hz, the system Zo would need to be considered to determine the power.
-- john, KE5FX Miles Design LLC > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Richard > (Rick) Karlquist > Sent: Thursday, August 11, 2016 3:01 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] State of the art of crystal oscillator measurements > > Zo doesn't matter for these purposes. > dBm works just as well for 75 ohm systems. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
