I was asked to help locate the source of RFI at N9CJT and yesterday we tracked down/identified the source to be from an AT&T (formerly Ameritech) system and all indications are that the system is VDS
ATT "U-Verse" service perhaps? I had straight ATT DSL, the original 3 MBit offering years back starting about 2010, and all energy was below 160 meters even (I work 160 from this small lot and the te
Dons 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 look
Hi, I must agree with Alan here... One of the first steps, ahead of WHAT, should be WHERE... This was a great example of RFI sleuthing! Well done! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARR
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 deter
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. Dir
Hi Jim and gang. I think everyone here is right. The point being that it really is most important to track down what property the RFI is originating from and then you can figure out exactly what devi
Don, I absolutely agree that your tools and methods for tracking are spot on. Those who take the time to study NK7Z's webpage will learn that "that kind of technology" is nothing more than a basic SD
FYI, Tracked a VDSL problem a year or two ago which seemed confusing at the time (was actually 2 DSL sources). Figured it was DSL as it had a strong increase in strength at 3.750MHz (this is where th
Here is followup & resolution regarding the RFI we tracked down about 3.5 weeks ago at the QTH of N9CJT that we suspected was DSL/VDSL as we had identified the RFI was coming from a box and associate
Thanks for the detailed update, Don. It is a bit intimidating to think that resolution of similar RFI issues might require high-level intervention at the level of a major corporation's president's of
Sounds like AT&T knows it has a problem with responsiveness, to have set up such an intervention mechanism. Good to see. 73, Pete N4ZR It is a bit intimidating to think that resolution of similar RF
"Criminal" is the right word. This is a violation of Federal Law. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/
Apparently, a customer didn't know that he had no internet service, since his router couldn't sync up ? I wonder how much AT&T was charging for that ? 73, Steve, N2IC ________________________________