A small point; the lowest carrier frequency is 153 kHz. Sidebands extend
down to 148 kHz. All the European LF and MF broadcasting carrier
frequencies are multiples of 9 kHz.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On
I don't need to, because Brent DeWitt has answered fully.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-08-12 22:09, John Allen wrote:
An “easy one” for us “oldies” but I’m sure that John Woodgate will
quickly reply “in
Interestingly, as I somewhat alluded to in my post on this topic, the
development work that went into the CE limit was based on the original LISN
design, which was a 5 uH model, whose impedance was specified from 150 kHz
to 30 MHz, and based on impedance measurements on a DC-3 aircraft back in
the
IMO, part of the answer is how it is being sold. If the product is known and
sold as Model ABC, then it should be tested as a system for compliance to the
applicable directives and standards and a DoC would be written for Model ABC
and it would indicate the various 'components' that comprise
Agree about start frequency. The AM BCB in Europe includes frequencies from
150 kHz to just shy of 300 kHz, as well as the 530 1710 kHz range
available in North America.
I know why 150 kHz to 30 MHz was used for military and aerospace CE, and I
think the commercial world just sort of copied the
For the upper end; conducted measurements end where radiated emissions
start. Back in the mists of time someone decided that a ten meter
wavelength was something that could radiated fairly efficiently from
cables, so radiated emissions sounded like more of a risk to
telecommunications.
The
An “easy one” for us “oldies” but I’m sure that John Woodgate will quickly
reply “in detail” – the frequency limit relates directly to the “old” Long
Wave” frequency band, which starts at 150kHz! J
John E Allen
W. London, UK
From: 06cee064502d-dmarc-requ...@ieee.org
Hello group,
Does anyone know why the conducted emissions for ITE products starts at 150KHz
and end at 30MHz? Why not start at 120KHz or 190KHz. Why finish at 30 and not
40MHz?
Thank youPeter#yiv9843054295 -- filtered {panose-1:2 4 5 3 5 4 6 3 2
4;}#yiv9843054295 filtered
Regarding upgrade, it might be feasible to look at it this way, depending on
the fine point details.
If the customer buys your upgrade parts in a B2B transaction (i.e. they
essentially hire you to provide parts that will upgrade equipment they already
own). Then the upgrade hardware is just
That is what used to be called a 'system', although the term seems to
have been dropped now. Each piece should be CE marked, otherwise the
surveillance authorities won't know it's legitimate. You don't need a
DoC for each bit, only for the system, but each bit needs an identifier,
which could
If I have an electronic product that I want to place on the market in
Europe, and the product is made up of several individual electronic devices
each powered by AC mains (packaged and sold together), do I place the CE
marking on only one of the devices or all devices?
And if the answer is "all
Does anyone out there have a simple transducer factor that yields rf
potential at the GTEM cell vertex coaxial connector for a given vertical
electric field component coupling to the cell septum? Purpose is to
calculate gain/noise figure specs for a preamplifier used between spectrum
analyzer and
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