[RFI] 80 meters RFI at N9CJT tracked down to an AT&T line (probably VDSL)

[Jim Brown]

I strongly disagree. The FIRST thing we should do in chasing noise is to 
determine whether it is impulse noise (mostly power line) or electronic 
noise, of which this is an example. Once that is determined, NK7Z's 
excellent method of 24 hour recordings revealing WHEN the noise is 
present lets us know WHEN to chase it. And when multiple sources are 
present, it can prevent us from getting confused.

I DO agree that trying to determine specific sources from their spectrum 
is a fool's errand.

73, Jim K9YC

On 9/10/2023 9:09 AM, Alan Higbie wrote:
> Don’s approach in this case is a good example of first focusing on WHERE IT
> IS.
> 
> Imagine how much time they saved by simply locating and sniffing out the
> source.
> 
> Trying to determine WHAT IT WAS by looking at the SDR, how it sounded and
> researching databases would have only added time and delayed elimination of
> the RFI.