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

[Dave (NK7Z)]

Hi,
Link to 24 hour recording methods...

https://www.nk7z.net/sdr-rfi-survey-p1/

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 9/10/23 12:05, Jim Brown wrote:
> 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.
> 
> 
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