[Elecraft] S meter differences from K3 to P3

[Jim Brown]

On 10/13/2013 9:23 PM, Alan Bloom wrote:
> However the P3 divides the signal into a nunber of frequency points on 
> the display, each of which only receives a small slice of the total 
> SSB signal.  A similar thing happens with noise.

Yes. There's also a setting in the P3 menu to automatically adjust the 
vertical gain of the display to compensate for the variable width of 
those slices (FFT guys call them "bins").

There's also the uncertainty principle as applied to frequency and 
time.  Because frequency and time are the inverse of each other, the 
product of frequency resolution and time resolution is a constant. It is 
impossible to accurately know BOTH frequency and time. We can adjust for 
one or the other, but always at the expense of the other.

73, Jim K9YC