[Elecraft] P3 Refresh rate

[Gene]

  I recently put p3 S/N 712 on line and notice the spectrum display is 
very jumpy as I tune up and down the band.

A) Is there an ideal refresh rate or a value one should start with?
B) Would this vary as band conditions change?
C) Is the rate tied in with averaging time?

I am used to seeing the spectrum display as on a ProII that I had, very 
steady and not jumpy.  Any help would be appreciated.

Thanks,  Gene
W2BXR
K3, 1188