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Re: [RFI] FW: ARLB022 FCC's OET Clarifies Emissions Compliance Testing f

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Subject: Re: [RFI] FW: ARLB022 FCC's OET Clarifies Emissions Compliance Testing for RF LED Lighting Devices
From: "KD7JYK DM09" <kd7jyk@earthlink.net>
Date: Thu, 30 Jun 2016 15:07:53 -0700
List-post: <rfi@contesting.com">mailto:rfi@contesting.com>
: I'd guess it's a start, at least!

I predict no change other than a run on Part 15 labels which the products 
have always had.  Adding an "a" or a "b" to the report before manufacturing 
is unlikely to mean anything except the maufacturer for a moment, long 
enough to push the same junk through.

"[W]e have found that emissions from RF LED lighting devices are
non-periodic, broadband in nature, and are produced as a byproduct
of the internal driver circuitry within the RF LED lighting device,"

What is a "RF LED lighting device" and since LEDs run on DC, why does such a 
potentially troubling circuit exist beyond a battery and rheostat?

the OET "knowledge database" paper said. "These types of emissions
have adequate energy and potential to generate radiated emissions
well above 30 MHz."

Yes, I hear them well into the 300 MHz range when I'm out and about.

"was pleased to see the FCC's OET clarify the test measurement requirements. 
He said ARRL is generally hearing more RFI complaints stemming from RF LED 
bulbs."

Can someone clarify an RF LED bulb?

"the Lab has seen LED lighting devices causing problems in the 2 meter band. 
"Since conducted emissions limits do not apply above 30 MHz, radiated 
emissions limits can be the first line of defense against RFI at these 
higher frequencies."

That would be nice.  I've been working with aircraft communications since 
mid-last year and noise is a big problem at ground level, often rendering a 
receiver useless.

If something was to change, what about the millions of RFI generating 
devices that already exist and are causing the current problems?

Kurt 

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