On Tue, 16 Sep 2008 17:29:46 -0400, Joe Subich, W4TV wrote: >As Stef says, you must first set a reference (AFV) before the >dBV (relative change) value has any meaning.
That MAY be how it's programmed, but that would not be right. 0 dBV is quite well defined by international standard as 1 volt RMS. 0 dBu is defined as 0.78 volts. Both of these are purely voltage measurements, independent of impedance. 0 dBm is 1 mw -- to measure it, one must also know the impedance. 0 dBu is the voltage that would be present with 0 dBm in 600 ohms. 73, Jim K9YC _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
