[SI-LIST] Re: 自动回复: Emission Problem with Ethernet
- From: "Stu Benner" <list@xxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Wed, 22 Sep 2010 13:11:10 -0400
Deepak,
I wrote to you several days ago off-list regarding your problem but did not
hear back from you. This issue is a bit OT for the SI list. Did you receive my
previous e-mail?
You may write me directly at the below address.
Regards,
Stu Benner
E3 Design Engineer/Owner
EMConsulting, LLC
P.O. Box 889
Hampstead, MD 21074-0889
phone: 301.730.2144
fax: 413.280.0665
e-mail: stu@xxxxxxxxxxxxx
web: www.emcwizard.com
LinkedIn: www.linkedin.com/in/stubenner
E3/EMI/EMC Consulting Engineering Services
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of deepak Engineer
Sent: Wednesday, September 22, 2010 11:27 AM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: 自动回复: Emission Problem with Ethernet
Hello Experts,
To control the Emmision from Ethernt port, now I am using a two seprate
ground.
My question is:
1. How 1nf, 10v and 1nf,2kv will make a difference in EMI test. I had only
1nf, 10V smd capacitor available, but it gives 4bd spike above the margin.
do you think that for Emission test the voltage rating is important? I
though it will improve the emission transition but not making any
difference.
2. Similarly if I try a 0ohms then I am getting better result compare to
capcitor...below the margin -1.88db
but if I am shorting the two plane with solder then again I am getting a 2db
spike above the margin.
here what are the advantage of 0ohms vs solder..??
what is the best option, 1nf or 0ohms or solder ?
what will help for ESD protestion?
from previous discussion of Daniel, I can see 1nf as a solution, but
pratically 0ohms is giving a better result.
thanks in advance,
Deepak
2010/9/18 <aub4362@xxxxxxxx>
> 您好，我已收到您的来信。
> 我现在外出中，当返回后会及时给您回复。
> 谢谢！
>
>
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