[RFI] FCC Limits on Harmful Interference: Clarification

[Kim Elmore]

Do you mean -120 dBm? How do you measure that? At what point is the 
radiated power measured? How do you connect to a device to measure it?

Besides, why stop there? Why not simply make it *undetectable*? As in, 
nothing known, no matter how it's connected, can detect if the system is 
operating?

Well, put simply, nothing will pass such a test. A level of -120 dBm is 
around the MDS for many receivers at the input terminals. I still say 
that if we *insist* on a standardized limit, someone will inevitably get 
screwed because you can bet your sweet bippy it won't be -120 dBm no 
matter how it's measured.

Kim N5OP

On 12/30/2019 10:01 PM, KD7JYK DM09 wrote:
> "We do NOT want a measured level of interference to define "harmful 
> interference"."
>
> How about just making it very, very low.?? -120dB at one meter from mHz 
> (1/100th of 1 Hertz) upward is adequate, should keep everyone, and 
> everything happy, and not unreasonable for equipment that shouldn't be 
> spewing interference anyway.
>
> This allows for a wide range of very poor design, without negative 
> affects.
>
> We have RFI because its allowed, why not flip it from "fine, within 
> these levels", to "knock that crap off"?
>
> Kurt
>
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-- 

Kim Elmore, Ph.D. (Adj. Assoc. Prof., OU School of Meteorology, CCM, PP 
SEL/MEL/Glider, N5OP, 2nd Class Radiotelegraph, GROL)

/"In theory there is no difference between theory and practice. But, in 
practice, there is." //??? Attributed to many people; it???s so true that it 
doesn???t matter who said it./