Re: [casper] 1Gbe Correlator

[Andrew Martens]

Hi Arturo

 It is possible to generate a correlator with data otuput through 1Gbit
 RJ45 Ethernet?
 We have 1 ROACH and 1 computer with no 10Gbe.

It is possible. You can write some software on the computer (look at the
python CORR package) that checks to see when the accumulator is done,
copies the data from the accumulator, and outputs/processes it in some
way.

The only problem with this approach is that it is slow. You will have to
accumulate for a long time (seconds) to be able to leave enough time to
copy all the data from the accumulator and output it. 

The first generation ROACH boards ethernet connections are also only
guaranteed to work at 100Mb/s due to issues with the ethernet module.
This will make your system even slower.

However, if this slowness is not a problem then this is the cheapest and
easiest option. 

Regards
Andrew

Re: [casper] 1Gbe Correlator

[Arturo Veras]

Thanks, then in the meantime I'll be doing the tutorials and changing the
outdated blocks when will be necessary. Any problem it will be report in
the mail list.

2013/1/16 Jason Manley jman...@ska.ac.za

 It _might_ work out the box. Next week we'll be updating the tutorials to
 work on Matlab 2012b and Xilinx 14.3, so then it should definitely work.
 Until then, you might just need to replace some of the outdated blocks (the
 pfb_fir and fft_wideband_real, for example, come to mind). In any event,
 you should be able to open the design and look at it; it might just not
 simulate or build properly.

 The control software should work fine as-is.

 Jason

 On 16 Jan 2013, at 17:01, Arturo Veras wrote:

  The tutorials says that the software requirements are.
 
  Ubuntu 10.10 SMP x86_64 GNU/Linux
  Matlab 2008b
  Xilinx ISE version 11.5
  CASPER lib gits_100511
 
  but i have installed MSSGE Setup with Xilinx 14.2 and Matlab 2012a -
 Ubuntu 12.04/Matlab 2012a/Xilinx 14.2 and
 https://github.com/ska-sa/mlib_devel.git libray.
 
  i will have to change to the tutorial requirements or the updated
 software is ok?
 
  2013/1/16 Jason Manley jman...@ska.ac.za
  Yes, this is possible. See tutorial 4 for an example.
 
  https://casper.berkeley.edu/wiki/Tutorials
 
  Jason
 
  On 16 Jan 2013, at 16:22, Arturo Veras wrote:
 
   hi,
  
   It is possible to generate a correlator with data otuput through 1Gbit
 RJ45 Ethernet?
   We have 1 ROACH and 1 computer with no 10Gbe.
   --
   Atte.
   Arturo
 
 
 
 
  --
  Atte.
  Arturo




-- 
Atte.
Arturo