https://www.nk7z.net/sdr-rfi-survey-p1/
Link to part II is at the bottom of part I
73s and thanks,
Dave (NK7Z/NNR0DC)
https://www.nk7z.net
Award Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 12/21/18 4:03 PM, Jim Brown wrote:
On 12/21/2018 2:19 PM, bill K7WXW wrote:
015 K7WXW RFI 122118-3 (5MHz sweep, centered at 4.05MHz)
- 130' doublet (main antenna, power off, fiber power on)
016 K7WXW RFI 122118-3 (5MHz sweep, centered at 4.05MHz)
- 130' doublet (main antenna, power off, fiber power off)
If it's there all the time, I'd suspect CATV or DSL backhaul
transmissions. If it's switched on and off and the pattern changes
occasionally (because the TV is reproducing different DTV formats),
maybe a Plasma TV. There's a discussion of both in the "chasing RFI" app
note I wrote several years ago.
http://k9yc.com/KillingReceiveNoise.pdf
This might be a good use for NK7Z's long slow waterfall pictures. See
his website -- it's a real treasure trove!
73, Jim K9YC
_______________________________________________
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
|