Grace and Bill,
Here is an excerpt from the FCC Rules:
15.3 Definitions
(k) Digital device. (Previously defined as a computing device). An
unintentional radiator (device or system) that generates and uses timing
signals or pulses at a rate in excess of 9,000 pulses (cycles) per
second and uses digital techniques;
Semantic argument coming. My device previously described does not
generate the pulses. It may transform these pulses but does not generate
(create) them. Reading the sentence above the operative terms are
generates AND uses. And, because of the AND, since we do not generate
then it makes no difference if we use the signals. My translation is we
do not generate therefore Part 15 does not apply to this specific product.
Okay, Kevlar donned, looking for arguments.
Best to all,
Scott
On 7/15/2013 4:38 AM, Grace Lin wrote:
Bill and Scott,
Since the operating frequency is higher than 9 kHz, FCC Part 15,
Subpart B-Unintentional Radiators applies. It is my understanding
that an IR device doesn't need certification.
I hope this helps.
Best regards,
Grace Lin
On Fri, Jul 12, 2013 at 9:51 PM, Bill Owsley <[email protected]
<mailto:[email protected]>> wrote:
For the USA, any electrical signal above 9 kHz meets the
requirement to be tested.
I think we will find similar for the EU.
EN 300 330, or 300 440, or something like that.
It has power and a switch and generates frequencies above the
lower limit - it gets tested.
ps. that means the device will need to be activated into its
operating condition for testing.
But if there is an exclusion list... I'm very interested!
------------------------------------------------------------------------
*From:* Scott Douglas <[email protected]
<mailto:[email protected]>>
*To:* "[email protected] <mailto:[email protected]>"
<[email protected] <mailto:[email protected]>>
*Sent:* Friday, July 12, 2013 9:47 AM
*Subject:* EMC Required?
Hi folks,
Consider a simple circuit. IR diode, a transistor or two, some
resistors
and caps. Receives input from IR remote, converts to
electrical and
sends down a wire. No clock in the thing so you could call is
passive.
But does it need EMC testing for US or EU? The IR signal will
be in the
35-50 kHz range so pulses down the wire will be the same. Does
this make
it fit within the realm of EMC required? The device is sold by
itself
without other products, but is always connected to something
else in
use. Something else could be a wide variety of anything. I
think of it
like a stand-alone audio speaker. Purely a passive device that
is driven
by signals that fall within the EMC required realm. So do you
do EMC or not?
Looking forward to your opinions on this.
Scott
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