[R-SIG-Finance] Non-financial "seasonality"

[Walt Keneipp]

We have a dataset with frequency from 40 to 1200 MHz in .01 MHz
increments, and corresponding amplitude in db.  There are spikes in
amplitude near 60 Hz and its harmonics caused by the AC line.  The
spikes are not necessarily AT 60 Hz, but vary between 59 and 61.  Is
there a good way to filter out these spikes?  If not, would smoothing be
the way to go?

Walt Keneipp
wkeneipp at stormproducts.com