[SI-LIST] Re: 自动回复: Emission Problem with Ethernet
- From: "Grasso, Charles" <Charles.Grasso@xxxxxxxxxxxx>
- To: 'deepak Engineer' <deepaksiengg@xxxxxxxxx>, "'si-list@xxxxxxxxxxxxx'" <si-list@xxxxxxxxxxxxx>
- Date: Wed, 22 Sep 2010 11:00:45 -0600
Hello Deepak,
First I would suugest that you post this question on a forum dedicated to EMC
type issue. Heres how:
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Second: I suggest you contact the manufacturer of your phy and connector.
They may be in a better position to help you.
Best Regards
Charles Grasso
Desk 303-706-5467
Cell: 303-204-2974
Chamber: 303-706-5144
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of deepak Engineer
Sent: Wednesday, September 22, 2010 9:27 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>
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