Re: [casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

They're not released yet, I'm going to deal with that once I've gotten the design up and running :-) Thanks for all your help as well! On Wed, Oct 29, 2014 at 6:21 PM, Jonathan Weintroub < jweintr...@cfa.harvard.edu> wrote: > Hi Ryan, > > Thanks for the response. > > To answer your question we u

Re: [casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

Hi Ryan, Thanks for the response. To answer your question we use 2^15 = 32 k FFTs operating on 8 bit real time samples, to channelize our visibility spectrum to 2^14 = 16k complex points. There is a pair of these 2^15 point PFBs on each Virtex 6, one for each 5 Gsps ADC input. We’d certainly

Re: [casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

Hi Jonathan! Reply is inline (in blue) Hi Ryan, That does look cool! You don’t mention which ADC you plan to use. Is it this one? https://casper.berkeley.edu/wiki/ADC1x5000-8 That's the one. Just to mention in case it proves useful that our group at Submillimeter Array (SMA) and Event Ho

Re: [casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

Hi Ryan, That does look cool! You don’t mention which ADC you plan to use. Is it this one? https://casper.berkeley.edu/wiki/ADC1x5000-8 Just to mention in case it proves useful that our group at Submillimeter Array (SMA) and Event Horizon Telescope (EHT) has been working on a correlator /

Re: [casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

Hey Ryan, This sounds great. I've just got a 312mhz design for a project in Cambridge to meet timing (broadly similar to what you're describing, but 10 single pol antennas and only 4k channels over 5ghz bw). Whilst I don't have any particular requests, I would be very interested in hearing about h

[casper] Starburst, an open-source 10gsps low-N correlator for ROACH2

Hey guys, The CASPER community has been a great help to me in the past few years. People have asked for my libraries and due to JPL policy, I've always had to turn them away. Thanks to help from Bob Jarnot, Jonathon Kocz and others, I'm now free to open-source some of my designs/libraries. For m

Re: [casper] spectrometer implementation using LX110T instead of SX95T

Hi Jack, Dan, et al, I’ve linked to two .mrp files in this message. The first is here and contains the utilization report for the spectrometer logic on a SX95T chip. The second, this on

Re: [casper] more chipscope troubles

That's exactly what I needed, Thank you! Jay Date: Wed, 29 Oct 2014 06:33:18 +0200 Subject: Re: [casper] more chipscope troubles From: he...@ska.ac.za To: jay_br...@live.com CC: casper@lists.berkeley.edu Hi Jay Attached is a chipscope project file for ROACH2. You can open it and it will probabl

Re: [casper] spectrometer implementation using LX110T instead of SX95T

Hi Louis, You can grab the report from the terminal, but it's also at the top of the map report file, at /XPS_ROACH_base/implementation/system_map.mrp Cheers, Jack On 29 October 2014 03:31, Louis Dartez wrote: > Hi Dan, > I cut the number of frequency channels from 2k to 512 this afternoon. Whe