[AMRadio] frequency sweeper

Paul Christensen w9ac at arrl.net
Thu Jan 21 13:41:14 EST 2010

> Hi Paul: that seems to match with the interval I am hearing here between 
> the
> two sweeps then the long interval, but, why do they do the wide freqencey
> range, if that is what I am hearing.

There's an IEEE paper that discusses the methodology although I've not read 

> is it a pulsed signal?

That would take further analysis of the sweep.

> I did not know that till looking at it, as it sounded clean as it swept 
> through wherever I
> was listening. if so how can they legally transmitt on that entire freq
> range?

National security under DHS.  I imagine they can, and will, do whatever they 

Paul, W9AC

More information about the AMRadio mailing list

This page last updated 19 Jan 2018.