We experience good performance iBob-> BEE2 over many 1m WL Gore IBN6800-1 cables.
We also experience good performance iBob->BEE2 over quite a few 1.5m WL Gore IBN6800-1.5 cables. We have experienced no unusual delays in receiving the 1.5m cables we have ordered even though they are non standard. We ran some limited tests with 2m meterIBN6800-2 iBob->BEE2 and they worked better than 3m and almost as good as 1.5m (surprise surprise). 1.5m were long enough for us so we use those. We experience difficulties over 3m IBN6800-3 for iBob->BEE2 and will not use them in this way unless there is an emergency. We use Zarlink fiber optic CX4 cables for 3m and longer. We also have fans, Sunon GM0504PEV1-8GN, in addition to heatsinks on every iBob's FPGA. Matt Dexter On Fri, 3 Apr 2009, G Jones wrote: > Hello, > I know this question comes up a lot, but is a 3 meter XAUI cable usable for > transmitting data from an iBOB to a BEE2? I have ready Suraj's memo about > testing the link integrity versus preemphasis and differential swing, in > which he says packets were always lost eventually. Is this common in other > people's experience? The memo mentions that tests were also performed with 1 > meter cables, but results are not mentioned for those tests. Do 1 meter > cables perform better? In my system, I can make all the cables 1 meter, but > the routing is more difficult. A 1.5 meter cable would be ideal, but is not > standard. As such, I would like to use 3 meter cables, but am concerned > about data integrity. If 1 meter cables are known to be more reliable than 3 > meter cables for this application, I will use them and deal with the cable > routing issues. > Thanks, > Glenn >
