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Re: [RFI] There goes the neighborhood.....

To: Jamie WW3S <ww3s@zoominternet.net>, rfi@contesting.com
Subject: Re: [RFI] There goes the neighborhood.....
From: "Dave Cole (NK7Z)" <dave@nk7z.net>
Date: Wed, 22 May 2019 21:55:25 -0700
List-post: <mailto:rfi@contesting.com>
Hi,

Yes I did play around with capture count... I selected a number, then ran the program for a few hours, and looked to see how much of the screen was filled. I then used that data to infer the right number to use to get a 24 hour capture that just filled my empty frame.

Someplace I found a method to calculate the correct number, but it only worked on one machine. If I applied the same procedure o a different machine it would fail...

So I just punted and used the method outlined above. I seem to remember getting a capture every 15 or 20 seconds to fill the screen... It all depends on the resolution you are using.

I have a set of numbers I use, that fill the screen in 24 hours, 12 hours, and 4 hours... I use different time resolutions to help pin down start times, or to view the RFI in a different time window...

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

On 5/22/19 6:20 PM, Jamie WW3S wrote:
Thanks Dave....attempting to setup a RSP1A for the screenshots as you described.....1920 seconds, every 32 minutes? Is that enough to capture? Did you try any other time frames?

------ Original Message ------
From: "Dave Cole (NK7Z)" <dave@nk7z.net>
To: rfi@contesting.com
Sent: 5/21/2019 12:31:48 PM
Subject: Re: [RFI] There goes the neighborhood.....

See my article in the March issue of CQ magazine, or visit:

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

If it were me, I would be documenting my current RFI environment, using the technique described in both articles...  That way, you know and can document what you have now...  PRIOR to turn on!

Start a log of every person you talk to, by name, include date and time, in addition to what was discussed.

Be friendly, nice, but take notes on everything you say, what was said to you, and what you do.

Read up on Part 15...  Approach is everything, be nice, don't threaten, don't cause a stink, always leave yourself in a position you can defend...

I would also contact the ARRL Labs for some advice as well, prior to talking to anyone... Paul replaced Mike Gruber there, and he seems to be a good fellow to know in these sorts of situations.   But do start your documentation process today!

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

On 5/21/19 9:03 AM, Jamie WW3S wrote:
Never thought I'd see it here in perpetually cloudy NW PA, but the neighbor across the street is getting some sort of roof mounted solar array installed.....I tried striking up a friendly conversation with the installers about what kind of system it was, but when they heard "ham radio" and "interference", that was the end of the conversation....the one guy said they never had a problem with radio interference before, but when I asked if they ever installed one next to an amateur radio operator, he couldn't say.....soooooo......what should I expect? Hopefully, there will be no issues, but if there is ?!?!?!?!?
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