Hi Ed,
Many thanks to the ARRL for the assistance in this! Also, thanks for
the link, and thanks to the ARRL for archiving that book as well!!
I am aware that pert 15 applies to equipment transmitting RFI, what I am
looking for the statement to the effect that a device must accept
interference from all licensed transmitters, which I think used to be on
the Part 15 statements.
I was hoping that the stove, having a computer in it, might have that
sort of label on it, containing the statement covering acceptance of RF
interference.
Is there any sort of statement by the FCC anywhere that indicates a
device must accept all interference from licensed transmitters, that
might be applicable to kitchen utilities? That would end my issues
instantly.
In looking at the handout linked in your email, adding a low pass filter
to the stove might prove difficult, unless we consider ferrite material
a low pass filter. :)
Did you get the model number I sent of the stove? Also please note the
complainant stated that GE has an RFI kit for the 110V volt version of
the stove, but not the 220V version of this device...
Again, many thanks to you and the ARRL for the assistance here Ed. This
will help in getting prepared for the meeting with the vendor, and the
owners of the stove.
Having the vendor state that a close by ham may be causing the problem
has biased the owners completely, so education is in order, but that is
difficult in this sort of situation.
I have sent my KPA500 to Elecraft to get a compliance check in
preparation for a meeting with the vendor, and the owners of the
affected stove.
I am considering asking the vendor to pay for this once the amp is
proven good... But that will happen after the RFI issue is solved.
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 3/13/19 1:21 PM, Hare, Ed W1RFI wrote:
Those regulations all apply to emissions from the device. In the US, with very
few exceptions, there are no FCC rules regarding immunity.
This now-out-of-print-but-wisely-archived FCC document may help:
http://www.arrl.org/fcc-info-1
See the CIB Interference Handbook and look for the statement about non-radio
devices improperly functioning as radio receivers.
Ed, W1RFI
-----Original Message-----
From: RFI <rfi-bounces@contesting.com> On Behalf Of David Eckhardt
Sent: Friday, February 22, 2019 2:41 PM
To: Dave Cole (NK7Z) <dave@nk7z.net>
Cc: Rfi List <rfi@contesting.com>
Subject: Re: [RFI] Trying to locate the Part 15 compliance note...
There likely wo't be a statement. Home appliances are specifically exempt from
FCC rules of any kind. 15.103(d) will be difficult to force into this case
where it arcs when an amateur transmits.
§ 15.103 Exempted devices.
The following devices are subject only to the general conditions of operation
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
in §§ 15.5 <https://www.law.cornell.edu/cfr/text/47/15.5> and 15.29 and are exempt from the specific
technical standards and other requirements contained in this part. The operator of the exempted device shall be required
to stop operating the device upon a finding by the Commission or its representative that the device is causing harmful
interference
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=5d78fa6c752a5326f26a026c51cd5136&term_occur=2&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>.
Operation
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=2&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
shall not resume until the condition causing the harmful interference
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=5d78fa6c752a5326f26a026c51cd5136&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
has been corrected. Although not mandatory, it is strongly recommended that the
manufacturer of an exempted device endeavor to have the device meet the
specific technical standards in this part.
(a) A digital device
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
utilized exclusively in any transportation vehicle including motor vehicles and
aircraft.
(b) A digital device
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=2&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
used exclusively as an electronic control or power system utilized by a public
utility or in an industrial plant. The term public utility includes equipment
only to the extent that it is in a dedicated building or large room owned or
leased by the utility and does not extend to equipment installed in a
subscriber's facility.
(c) A digital device
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=3&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
used exclusively as industrial, commercial, or medical test equipment
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=441f0834af528658594b49e1da1a6c03&term_occur=1&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>.
(d) A digital device
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=4&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
utilized exclusively in an appliance, e.g., microwave oven, dishwasher, clothes
dryer, air conditioner (central or window), etc.
(e) Specialized medical digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=5&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
(generally used at the direction of or under the supervision of a licensed health care practitioner)
whether used in a patient's home or a health care facility. Non-specialized medical devices, i.e.,
devices marketed through retail channels for use by the general public, are not exempted. This exemption
also does not apply to digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=6&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
used for record keeping or any purpose not directly connected with medical
treatment.
(f)Digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=7&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
that have a power consumption not exceeding 6 nW.
(g) Joystick controllers or similar devices, such as a mouse, used with digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=8&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
but which contain only non-digital circuitry or a simple circuit to convert the
signal to the format required (e.g., an integrated circuit for analog to
digital conversion) are viewed as passive add-on devices, not themselves
directly subject to the technical standards or the equipment authorization
requirements.
(h)Digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=9&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
in which both the highest frequency generated and the highest frequency used are less than 1.705 MHz and
which do not operate from the AC power lines or contain provisions for operation
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=3&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
while connected to the AC power lines. Digital devices
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=6babe455bce3a26aa2bfbfcfcd63b081&term_occur=10&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
that include, or make provision for the use of, battery eliminators, AC adaptors or battery chargers
which permit operation
<https://www.law.cornell.edu/definitions/index.php?width=840&height=800&iframe=true&def_id=ec0f841baebb6ddab3bb9ff7e69ad5e9&term_occur=4&term_src=Title:47:Chapter:I:Subchapter:A:Part:15:Subpart:B:15.103>
while charging or that connect to the AC power lines indirectly, obtaining
their power through another device which is connected to the AC power lines, do
not fall under this exemption.
(i) Responsible parties should note that equipment containing more than one
device is not exempt from the technical standards in this part unless all of
the devices in the equipment meet the criteria for exemption. If only one of
the included devices qualifies for exemption, the remainder of the equipment
must comply with any applicable regulations. If a device performs more than one
function and all of those functions do not meet the criteria for exemption, the
device does not qualify for inclusion under the exemptions.
On Fri, Feb 22, 2019 at 3:32 AM Dave Cole (NK7Z) <dave@nk7z.net> wrote:
Hi,
I have an interesting RFI issue happening. My neighbors oven is
acting up when I transmit. It looks like the oven is taking RF in via
the power lines. In our discussions, part 15 compliance came up. I
have offered to have an electrician install some ferrite material on
the power lines, and pay for it, but they want to pursue with GE as
they indicated they may get a replacement stove... Anyway...
I have the model number for the stove, it is a GE Signature Cafe model
number C2S985SET9SS.
After downloading the manual, the installation information, and the
users guide, I can not locate a Part 15 compliance note anywhere...
Can someone help my locate this?
--
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
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