[casper] iBOB to iBOB over 15m CX4

Has anyone tried to send 10Gbe data to an iBOB over long (10-15m) CX4 cables? We find that the iBOB can transmit OK but not receive - its carrier detect LED does not light up. We have no problems with 3m cables. Not sure if changing pre-emphasis or signal level would help as the problem appears

Re: [casper] iBOB to iBOB over 15m CX4

Has anyone tried to send 10Gbe data to an iBOB over long (10-15m) CX4 cables? We find that the iBOB can transmit OK but not receive - its carrier detect LED does not light up. We have no problems with 3m cables. Not sure if changing pre-emphasis or signal level would help as the problem

[casper] Inter-chip connections problem

All, Randy and I are closing in one completing phase 1 of our pulsar machine. We have two iBOB samplers streaming samples over XAUI into the BEE2's FPGA1 and FPGA3, where the pfb fft take place. Then we're using the inter-chip connections to pass the FFT bin values over to FPGA2 where the

Re: [casper] Inter-chip connections problem

Didn't Aaron Parsons find that the BEE2's inter-FPGA buses have particular clock frequencies were it would work and others that it would not ? As I understood it there was some question about the on-board signal integrity of those signals. I don't know if the root problem was identified or not.