[Elecraft] K3 dbV in 2.38

[Jim Brown]

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