[casper] XAUI sync problem

All, As some of you may know, Randy I have been working on getting reliable data transmission across the inter-chip connections on the BEE2. We managed to get that working reliably and have moved on to the next problem that has reared its ugly head. Once we got back to the point of

Re: [casper] XAUI sync problem

I think what must be happening is even though your iBOB and BEE2 are running on the same clock, the XAUI links have independent 156.25 MHz clocks, so even though the same data rate is going in as coming out, the data is available at the other end of the link at slightly different times, so they

Re: [casper] XAUI sync problem

I think the 10GBE signal has clock embedded in it, the incoming clock should be used instead of local one. Very possibly this is already the case, but it's worth checking. Another guess is that there is a gounding problem and sometimes the common-ground voltage saturates the receivers. Easy

Re: [casper] XAUI sync problem

All, Thanks a bunch for all the replies! Definitely some things to look into. See my responses to Dan's questions below. Jason At 11:29 AM 7/21/2008, Dan Werthimer wrote: hi jason, what cable lengths are you using? we recommend 1 meter max for ibob to bee2 cables. 3 meter cables