[Elecraft] K3 NB problem

[Larry - K1UO]

I discovered the source of a “noise” I was complaining about on 80M cw this AM.  I finally noticed that it would always come on at exactly the time VK9WA said “UP”!!   and varied in intensity and duration until he answered someone..at which time the noise was gone and S meter returned to S1!!    Seems like the NB  settings on the K3 are causing IMD and phase noise from the pileup up the Band a bit to sound like rain static and jump to a level of S5-6 on the K3 meter!  Never ran into that before with a K3...  Then again, except for this new electric fence pulse, I never needed to use the NB for anything at this previously dead quiet location.    Any ideas on what settings I should use or try for this electric fence noise?  Possibly the settings that I am using are too aggressive and would cause this?
Regards
Larry  K1UO