[Elecraft] Visual Noise on P3 Display.

[Paul J. Cort-Wright]

 As I tune my K3 frequency, Adjust Ref Level on P3, adjust span on P3 etc. The visual noise amplitude increases on the P3 display to double the amplitude BUT then dies away to normal after about a second. 

Is this normal and can any one suggest a setting to cut this effect?

Thanks in advance.

Paul G3SEM