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From: Dan Roman [mailto:danp...@verizon.net]
Sent: Wednesday, September 05, 2018 3:51 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] RF immunity - audio noise in headsets
Used to run into something similar when testing old
Used to run into something similar when testing old telecom POTS lines years
back. CISPR 24, if I recall correctly, has a set of criteria for determining a
pass for immunity to demodulating the 1kHz.
With the POTS lines, the problem was finding a POTS test set that could give
you a 1kHz tone d
ut can be effectively attenuated with filtering.
Regards;
Ian McBurney
Lead Compliance Engineer.
Allen & Heath Ltd.
From: James Pawson (U3C)
Sent: 05 September 2018 09:17
To: McBurney, Ian ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] RF immunity - audio noise in headsets
Hi Ian,
That&
Engineer.
Allen & Heath Ltd.
From: James Pawson (U3C)
Sent: 05 September 2018 08:17
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] RF immunity - audio noise in headsets
Hi Amund, hope you are well.
Some general thinking aloud follows, some of which you may have already
considered.
I w
oduct.
Ian McBurney
Lead Compliance Engineer.
Allen & Heath Ltd.
From: James Pawson (U3C) mailto:ja...@unit3compliance.co.uk> >
Sent: 05 September 2018 08:17
To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] RF immunity - au
You would only hear the 1 kHz tone during immunity testing. It's very
unlikely that one would hear anything noticeable when the product is in
normal use. Electret microphones almost always have capacitors included
to give immunity at cellphone frequencies, for obvious reasons, and
their small d
05 September 2018 07:01
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] RF immunity - audio noise in headsets
Wired headsets and microphones connected to a product, often acts as
receiver for induced RF fields. That means you quite often hear the 1kHz
modulation tone under the RF immunity
Wired headsets and microphones connected to a product, often acts as
receiver for induced RF fields. That means you quite often hear the 1kHz
modulation tone under the RF immunity tests. This is quite annoying for the
user and above a certain level, not acceptable.
To avoid such phenomena is qu
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