While I had nothing to do with any CISPR limit setting or test methods, it
seems intuitively appealing that the 80 MHz demarcation between conducted
and radiated immunity is based on the efficiency of the biconical antenna,
or any similarly sized antenna:
Ken Javor
Phone: (256) 650-5261
From:
Jeff,
I’m not sure what the technical rationale was back when CISPR 24 was originally
published (yes, the 3 V limit dates back to then) but as I recall the idea was
that above 80 MHz you could generate a uniform field and below 80 MHz this was
far more difficult. Why 80 MHz? Because it was
Hi everyone:
It seems that there are lots of dimmable 24V LED power supplies out there,
but the first 3 or 4 that we have looked at do not pass CE for various
loading conditions. These are not simple 24V DC output supplies, these also
have a two-terminal input port to accept a 0-10V analog or PWM
Thank You Charlie.Christopher
On Thursday, March 25, 2021, 12:45:32 PM PDT, Charlie Blackham
wrote:
Chris
EN 302 502 doesn’t require LBT – but is for Broadband Fixed Wireless Access
(this doesn’t have to be “WiFi”, but often is)
Best regards
Charlie
Charlie Blackham
Chris
EN 302 502 doesn’t require LBT – but is for Broadband Fixed Wireless Access
(this doesn’t have to be “WiFi”, but often is)
Best regards
Charlie
Charlie Blackham
Sulis Consultants Ltd
Tel: +44 (0)7946 624317
Web: https://sulisconsultants.com/
Registered in England and Wales, number 0546624
Thank you Charlie! This answers my question very well.
Yes, 60950-1 to 62368-1 has been an 'adventure'.
Chris
Chris Brown
Team Lead Compliance
t 519-455-9675 - Ext 1380
t 800-265-1844 - Ext 1380
From: Charlie Blackham
Sent: Thursday, March 25, 2021 3:30 PM
To: EMC-PSTC@LISTSERV.IE
Chris
EU Directives don’t require assessing (to new standards) to “remain compliant”
- they require re-assessing to maintain a “Presumption of Conformity”.
There is no grandfathering under CE marking as standards are only every
optional (though that’s a narrow technicality to sit on for some di
Charlie,
Yes we have both Master and slave devices.
How about EN 302 502 does it require LBT?
mostly we are in 5725-5850 MHz band due to higher EIRP.
Regards
Christopher
On Thursday, March 25, 2021, 12:17:52 PM PDT, Charlie Blackham
wrote:
Christopher
EN 301 893 requires LBT to
FORWARD:
In an Implementing Decision (EU) 2021/455 issued in mid-March, the Commission
moved to replace the 2010 edition of EN 55024, Electromagnetic compatibility -
Product family standard for audio, video, audio-visual and entertainment
lighting control apparatus for professional use - Part 2:
Christopher
EN 301 893 requires LBT to meet the mandatory Adaptivity clause
I’m assuming that you comply with DFS Slave only, as DFS master requires
ability to detect, so is a form of LBT.
I think the only bit of 5 GHz spectrum available to you is 5725-5875 MHz at 25
mW under EN 300 440. Some
Not an answer, but one would expect some sort of correlation between the
61000-4-6 levels of 1, 3, and 10 V, and the 61000-4-3 levels of 1, 3, and 10
V/m.
But I have asked for and never seen the derivation.
Ken Javor
Phone: (256) 650-5261
Hello all,
I am looking for background information
The reduction on the level on radiated emissions might come from the CISPR 20,
As you might know CIPSR 35 is a combination of CISPR 24 and CISPR 20.
Sincerely,
Dieter Paasche
Senior Product Developer, Electrical
CHRISTIE
809 Wellington Street North
Kitchener, ON N2G 4Y7
Phone: 519-744-8005 ext.
Hi Jeff:
Back in the days when people had ordinary telephones and AM radio stations were
common, it was a “known thing” that cables near an AM radio transmitter could
develop common mode voltages up to 3 Vrms. If the phone did not have perfect
earth balance at the AM frequency, there would
Folks,
I have a 5GHz Wifi product that does not meet LBT conformanence.
What ETSI certification can I pursue?
Can we use EN 301 893 or EN 302 502 standards.
We do however meet DFS requirements.
Thank you for your feedback in advance.
Regards
Christopher
-
-
Hello all,
I am looking for background information on the rationale behind the
conducted immunity test levels defined in EN 55035 / CISPR 35 and IEC
61000-4-6.
Specifically, in 55035:2016 table 2, clause 2.1 calls for a test level of
3V rms from 0.15 to 10MHz. It also defines a slope that reduc
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