[casper] Roach2/channelization question

[Jon Richards]

All, I need some advice. We are looking into developing an FX correlator using the Roach2 s as the "F" and GPUs as the "X". We will have 4 inputs to the Roach2 ADCs, at 250Msamples/sec, 8Gb/sec flowing out to the X boards. How many channels should the Roach2 be able to process? How would I guestimate that? Any ideas appreciated! Thanks, Jon Richards