Check out:
https://www.nk7z.net/sdr-rfi-survey-p1/
That will give you some tools to quantify the issue.
Then check out:
https://www.nk7z.net/category/info/rfi-mitigation/
That will give you more info to assist in this...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources
On 2/6/21 7:18 PM, w6jh--- via RFI wrote:
This RFI starts up each evening. It's not present during the afternoon and usually
doesn't start until well after dark I did notice it earlier this morning well after
sunrise. It was gone later in the day. It starts as several narrow "humps"
walking across the panadapter from lower to higher frequency. They appear at first as
almost horizontal sweep lines on the waterfall gradually curving upward to vertical and
after 20 or 30 seconds settling into the pattern seen below. I can't seem to correlate it
to anything in the house. I suspected my neighbor's energy saving, variable speed pool
pump because the startup pattern makes me think it's rotating machinery. However, I think
his pump was running this afternoon while the rfi was NOT present, and vice versa this
evening. It's most pronounced on a vertical, I can see it a little on an inverted vee. It
extends above and below the 40 meter band, but I don't see it on 80M or on 30M. Any idea
where to start looking?
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|