[RFI] Screenshots of a wideband short pulse

Cortland Richmond ka5s at earthlink.net
Fri Dec 14 03:58:18 EST 2012


Not quite; what does it look like on a 'scope? Can you display the pulse 
from perhaps, an IF output? Even simpler, try connecting a 'scope 
directly to the antenna; you may or may not need a broad band preamp 
ahead of it.

It is quite often useful to know what interference looks like not on a 
waterfall or even a spectrum analyzer, but at the scale of its pulse 
length, perhaps 2, 5 or 10 msec per division.

Cortland
KA5S

On 12/13/2012 2320, Aaron Kreider wrote:
> Cortland,
>
> What do you mean?  Do you want to know how much time goes by on the 
> vertical axis?
>
> It takes about 25 seconds for the spectrum to scroll by when it is 
> probably 400 pixels tall - so 16 pixels per second.  It looks like the 
> pulses are between 1 and 5 pixels tall - so 1/16th to 5/16th of a 
> second (not sure if the AGC affects this).
>



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