All:
I made the mistake of hitting send without editing so I apologize for my
previous post on radiated emission limits. As Ed Hare mentioned numerous
times, there are no FCC limits on radiated emissions below 30 MHz.
What I meant to say was this:
Ed mentioned that the FCC had taken action based on harmful interference
and I assumed it was based solely on the definition of interference and
not how it was generated i.e, radiated or conducted. Hence, I asked how
the FCC measures harmful interference.
This seems logical because the term harmful interference would be
meaningless if the FCC only deems it as such if it's conducted and not
radiated -- it's either harmful or it's not.
Or am I missing something?
Tony -K2MO
Actually, the FCC really hasn't given up on HF. What I have said is that
there are no radiated emissions limits for unintentional emitters below 30 MHz.
(There are conducted limits onto the AC mains.) But the FCC has sent out many
dozens of advisory letters to operators of various devices on the basis of
harmful interference. Now, they will set a higher threshold for harmful
interference than we like, but the can and do take some (limited) action.
ARRL has worked hard to keep this alive in the FCC, and so far, it has held.
The solar panels are unique. Their conducted emissions limits apply ONLY the
ac mains, not other wires, so many of these systems that can and do cause
interference do actually meet the laws about radiated and conducted limits.
Solar Edge may be a bit slow, but they are responding and ARRL maintains
regular contact with them. We have a few unresolved cases and we are planning
a field trip to go take a look at them in person, hopefully with Solar Edge
and Telsa also present.
Ed
, just CONDUCTED emissions, and that is only on the side that attaches
to the power lines.
So say the panels, optimizers etc are radiating like mad, but the side of the
inverter that hooks to the mains is clean. They meet part 15.
Hence the problem
--
73 de KG2V
Charlie
On Dec 28, 2019, at 2:56 PM, Tony <dxdx@optonline.net> wrote:
On 12/22/2019 6:19 PM, Hare, Ed W1RFI wrote:
the FCC has sent out many dozens of advisory letters to operators of various
devices on the basis of harmful interference.
Does anyone know what the FCC limits are on harmful interference caused by
radiated emissions with regard to HF and the amateur radio service? Is the
noise measured at the receiving station or is it measured at some specified
distance from the offending device?
It would be interesting to know if the same FCC standards apply to commercial
and aviation services.
Tony -K2MO
_______________________________________________
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
_______________________________________________
RFI mailing list
RFI@contesting.com
http://lists.contesting.com/mailman/listinfo/rfi
|