[RFI] FCC RFI Question

Dave Cole (NK7Z) dave at nk7z.net
Tue Aug 14 23:43:50 EDT 2018


If I understand the rules correctly, I believe it is based on if your 
licensed station is being interfered with.  If so, then it is not OK.  I 
am sure there is some lower limit to this, but I don't know what it is.

Perhaps Ed from the ARRL could let us know more about this.

73s and thanks,
Dave (NK7Z/NNR0DC)
ARRL Technical Specialist

On 08/14/2018 06:20 PM, Tony wrote:
> All:
> I was wondering how the FCC measures the level of RFI emanating from a 
> distant device to determine whether it's above or below FCC limitations?
> The reason I ask is that the RFI emanating from the device might meet a 
> certain criteria when measured some number of feet from the unit, but 
> the bottom line for the ham is whether the noise is still heard on his 
> or her receiver.
> That brings up the question of whether or not the FCC deems a certain 
> level of RFI as "acceptiable"? My neighbors solar panels generate RFI 
> ranging from S-5 to S-9 throughout the day and even at lower levels, the 
> noise makes S-9 signals difficult to copy.
> This video demonstrates how intrusive it can be at S-5 levels: 
> https://www.youtube.com/watch?v=yc4uMkWYYBc
> Tony -K2MO
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