Re: [casper] Any cable length considerations for ROACH?

We routinely use 3m cables. We have a few 5 m cables in use, but not for GUPPI production use, just in the lab. But they seem to work fine. I remember that the ibob would not drive a very long cable... John > > Hi Billy, > > By in the lab I was trying to say I have a box of 3m cables sitting u

[casper] Request for a sample bof file

I would like to test a set-up that I've just configured. I've got a KatADC in Z-Doc 0 of a ROACH-1. The signal is going into IF 0. Pretty much anything will do, though. It's easy to swap Z-Docs and IF inputs, so that's not a constraint. Even the first stage of a FX correlator would be fin

Re: [casper] Any cable length considerations for ROACH?

Hi Billy, By in the lab I was trying to say I have a box of 3m cables sitting unused on the floor. But I just checked... and the PAPER project is running with 8 Roach1s each using 1 3m passive cable to send data to/from a Fujistu 10GbE switch. I think the user data rates are 6.4 Gbps each way.

Re: [casper] Any cable length considerations for ROACH?

Thanks, Dan and Matt- hearing that 3m is being used is enough for me. FWIW I'll be running these to CX4 modules on a Fujitsu XG0448 for most of the time. I'll take a shot at 3m. Billy -Original Message- From: casper-boun...@lists.berkeley.edu [mailto:casper-boun...@lists.berkeley.edu]

Re: [casper] Any cable length considerations for ROACH?

Hi, most of my knowledge, such as it was, is probably obsolete by now. I haven't performed the tests to be able to say, one way or another, how the Roach1 nor Roach2 w/ long passive cable assemblies. Sorry - just haven't had the time. The longest passive cable I have in the lab is 3m. So I cou

Re: [casper] Any cable length considerations for ROACH?

hi billy, info on copper and optical cables we've tested is at: https://casper.berkeley.edu/wiki/Equipment_Cables virtex2 fpga's (ibob, bee2) do not meet 10GbeCX4 specifications, but virtex5 fpga's (roach) does meet the 10GbeX4 spec, so 5 meter CX4 cables should work. the longest cable we've us

[casper] Any cable length considerations for ROACH?

Hi all, Are there any cable length considerations for the ROACH? The BEE2s had some limitations of not playing well > 2m copper CX4 cables (discussed in past threads). I can't find any threads on similar issues with the ROACH - does that mean there are none? What lengths are folks successfully