[SI-LIST] Use of non specific connectors for ethernet 10/100 communication

From: jfhasson@xxxxxxxxxxxxxxxx
To: si-list@xxxxxxxxxxxxx
Date: Tue, 2 Aug 2011 18:45:53 +0200

Hi,

I am currently working on a project involving a 10/100 BASE TX link. It is 
intended to route this bus through non specific connectors ie connectors for 
which differential impedance and return loss are not guaranteed. Is it valid to 
consider impedance as not being a problem as the impedance discontinuity length 
due to the connector is not more than 2 cm long which is small compared to the 
significant wavelength of the 100 BASE TX signal ? Regarding crosstalk we can 
separate the RX and TX signals significantly so we don't believe it would be an 
issue knowing we would only have this full duplex ethernet bus inthe connector. 
We don't have to show compliance to the 802.3 standard but we need to have an 
operating link over up to 15 meters. We would be using shielded cables of a 
quadrax type. What issues could we meet in terms of EMI or SI if the previous 
statements are valid ?

JF Hasson


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[SI-LIST] Use of non specific connectors for ethernet 10/100 communication

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