Yup, since this accessory gear is not part of the test, only used to provide
the communications, find the quietest one you can for a typical expected
environment that your EUT is expected to go in. I have also in a debug mode,
used a wrap plug on the end and run the diagnostics to see what
Hi Charles,
I would use a Netgear switch. They seem to be the best for emissions. The
newer retail ones should be able to pass class B. Routers and switches are
known to cause EMI problems even outside the test site. You want to best
simulate the environment your product will be used.
Section 9.5.3.5 of CISPR 22, 3rd Edition reads:
“9.5.3.5 Measurements at telecommunications ports intended for connection to
cables
containing more than two balanced pairs or to unbalanced cables
The measurement method of C.1.3 or C.1.4 shall be used. At each frequency, the
requirements
I am looking for someone who has experience with the safety aspects of
high-energy magnet charging systems. Charging currents will be on the order of
20 kA. If you have experience in this area, please respond directly to me.
Thanks for your help!
--
Doug Nix
QPS Evaluation Services Inc.
Mobile:
We have a few seats left in our laser safety officer training course that is
being offered the week of 18-Jun-07. If you are interested, please visit our
website, http://www.qps.ca/ www.qps.ca, and follow the links to the laser
safety registration pages.
--
Doug Nix
QPS Evaluation Services Inc.
In message
8b3bf7a02b910640ab146a919ab36594028bb...@exsvl03.hq.netapp.com, dated
Fri, 18 May 2007, Kim, Ben ben@netapp.com writes:
However, 10Mbps/100Mbps uses only 2 pair (4 wires) although the number
of wires are 8. Since unused wires are not considered as balanced
pair,
it would be
Hi folks,
I have some a question on Ethernet emissions testing that I would appreciate
some help with.
Q. Is there a “preferred” active load (i.e router/PC/switch/hub) that I
can use for testing.?
I can vastly change my emissions profile depending on the device I pick.
[Please note
1Gbps uses all 4 pairs (8 wires) that requires 8 wire balanced ISN. Unlike
EN55022:1998, new EN55022:2006 ALLOWS to use 8 wires ISN for ALL applications
including 1 pair, 2 pairs, 3 pairs and 4 pairs (See Figure D.3, EN55022:2006)
However, 10Mbps/100Mbps uses only 2 pair (4 wires) although the
Our 100BaseTX Ethernet passed RF conducted immunity at UL-Melville using the
Fischer interface. We had no trouble getting a 'link' on the EUT and the AE
(an Ethernet switch).
Caution:
Some ferrite 'magic bullits' sold for Ethernet cause 'cable-length'
sensitivity (non-communication at some
Ghery,
I need to ask about this one. All of the CDN / ISN adapters I have used
including RS, Fischer Schaffner 4-Wire ISN/CDNs all have coupling networks
for 4 interfaces and are labelled for E1, Ethernet, ISDN, etc., so you are
saying the intent of CISPR 22 was to have all those interfaces
CISPR 22 requires that you use an ISN based on the number of wires in the
cable, not the number actually being used. All Ethernet tests should be done
with an 8 wire ISN as Cat 3, Cat 5 and Cat 6 cables all have 8 wires.
Ghery
_
From: emcp...@aol.com [mailto:emcp...@aol.com]
Hi Ghery,
It is a two balanced pair ISN, so of course Gigabit Ethernet will not
function, but I had trouble with 100 Mbps working through the ISN. I couldn't
get a ping through it, so the probes were used instead. Maybe a newer 8 wire
ISN will do the job.
Thanks,
Tim
_
See what's
Why doesn’t it function? We test Ethernet using ISNs without any problem.
Sure you’re using an 8 wire ISN?
Ghery S. Pettit
_
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of emcp...@aol.com
Sent: Friday, May 18, 2007 11:31 AM
To: ben@netapp.com;
Hi Ben,
I have an Ethernet port but it does not function with the ISN, so I use the
probes. So with the different LCL you mentioned earlier, the ISN equipment
would need to be updated for the 2006 standard?
Thanks,
Tim
_
See what's free at AOL.com
Hi Tim,
It is depending on type of telecom port. If ISN device is currently available
as defined in the standard, it should be used as long as your product is
functional as intended. If there is no ISN available for your specific telecom
port, you may use probes as an alternative. In case of
Hi Ben,
So if I'm getting my test done with the capacitive voltage probe for voltage
measurement and current probe for current measurement, the telecom conducted
emission requirement remains the same? My equipment will not function
properly when connected to an ISN so the lab uses the current
Tim,
Both EN 55022:1998+A1+A2 and EN 55022: 2006 standards are now listed in
European OJ. One of major differences is the specification of ISN
LCL(longitudinal Conversion Loss) for telecom ports although ISN spec is still
controversial in general. If you want to declare to EN55022:2006 standard,
Hi,
I would like to know what the difference is between EN 55022:1998+A1+A2 and EN
55022: 2006. Has the telecommunication port conducted emission test changed
at all? If I already tested to the 1998 standard, do I need to retest my
ethernet port to the new standard? Does the 2006 standard
Yes, modems and IEEE 802.11 WLAN are required to be certified for sale in the
Vietnam market. These requirements were implemented in November of last year.
Vietnam Regulatory Agency: The Ministry of Posts and Telematics (MPT) of the
Socialist Republic of Viet Nam.
Telecom Wireless products
Peter:
The standard I mentioned is for EMC, dated May 2006, a previous issue was
dated
September 2001. This is for Telecom equipment that would be connected to the
public
network. ITE equipment does not fall under this standard. ITE equipment does
not have
to comply with EMC or safety
Is there a requirement in Vietnam for telecom approval of standard analog
modems (56k dial-up)?
Thanks.
Jim Hulbert
__
This email has been scanned by the MessageLabs Email Security System.
For more information please visit
Kevin -
Please expand on this:
From: Kevin Keegan
Sent: Friday, May 18, 2007 6:21 AM
May2006 Safety is as per IEC 60950.
Is the date a typo or are you saying that, as of MAY2006 (last year)
some form of safety certification is required in India for ITE and TE?
A particular national
Jim - A couple of folks here have been to the course.
I'll ask them.
Best Regards
Charles Grasso
Compliance Engineer
Echostar Communications Corp.
Tel: 303-706-5467
Fax: 303-799-6222
Cell: 303-204-2974
Pager/Short Message: 3032042...@vtext.com
Email: charles.gra...@echostar.com
From:
Gert – in your discussion with Neven you said:
TIP: do you have a large ethernet building installation
which underperforms heavily ? Add a grounding
resistor of 100 K to chassis ground on one wire of
each of the pairs. Good chance that you
have a capacitively coupled mains voltage
in
Bob:
Just to add to your comment, For Telecom products , EMI/EMC is mandatory as
per
Standard No.SD/EMI-02/03. May2006 Safety is as per IEC 60950.
Regards:
Kevin Keegan
Senior Associate
KES Associates
1 Stonecroft Terrace
Kanata, Ontario
Canada K2K 2V1
Tel: 613-592-0820
Email:
Daniel,
For non-telecom/radiocom, the regulatory authority is SABS. You willneed LoA
(safety) and CoC (emc). For the LoA you will need the name of your importer.
For telecom/radiocom the regulatory authority is ICASA.
Best Regards,
Peter
Daniel Liang daniel_liang_...@yahoo.com wrote:
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