[Lowfer] "DOG BONES"

[EVP]

    These are due to transient response of the filters at the leading 
and trailing edges of a signal with "sharp" keying.  This sort of signal 
does have signficant "out of filter" frequency components on both start 
and finish and the filter has to respond to them by shown a wider 
frequency response.  In principle they are there at all signal levels 
but most pronounced with straing signals.  Over load will increase the 
effect of course.

    If Alberto reads this maybe he can add more informed comments.

Ed

Joe,

Too high an audio level will cause the FFT results to spill into 
adjacent frequency bins and widen the trace on the screen. Simply 
backing off the input level to Argo (or whatever program you use), will 
thin out the lines and reduce background noise. BUT, you might lose the 
trace altogether in a fade, so it's reasonable to let things bloom out a 
bit on the signal peaks.

John, W1TAG