[SI-LIST] AW: Return loss on 10G signals
- From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- To: bala <balaseven@xxxxxxxxx>, si-list@xxxxxxxxxxxxx
- Date: Fri, 29 Jul 2011 12:46:12 +0200
Hi Bala,
if you terminate the SFP+ end with 100Ohm, then the resulting ipedance will be
50Ohm (SFP+ transceiver 100Ohm parallel to 100Ohm resistor). I don't think this
will reduce the return loss in any way.
You should check the SFP+ footprint, vias (if there are any) and BGA Footprint
for high reflections. Did you cut out the GND plane underneath the SFP+ solder
pad?
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von bala
Gesendet: Freitag, 29. Juli 2011 12:12
An: si-list@xxxxxxxxxxxxx
Betreff: [SI-LIST] Return loss on 10G signals
Hi Experts,
We have XAUI Tranciver and SFP+ in our design.While simulating for the total
channel loss,we saw some return loss issues.Is this okay to add
100 ohm termination at the SFP+ end.Is this acepatble.its 10G signals.Please
help.
--
bala
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