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

Hi Ryan, I'll be very interested in the ADC core matching since we calibrated that ADC as well.. so it would be good to compare. Best Regards, Raul 2014-10-29 22:26 GMT-03:00 Ryan Monroe ryan.m.mon...@gmail.com: They're not released yet, I'm going to deal with that once I've gotten the

[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

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

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

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

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

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 use