Re: [casper] ROACH2 dies on fpga.read(...)

Below is a message I wrote with more about the problems we had at NRAO, which did not make it to the list. By the way, others at NRAO are using a recent version of the repository and have had better luck, but based on your experience I wonder if there is still some subtle issue with marginal

[casper] Fwd: Connecting ADC to Roach1

Dear casper list, I'm a research student at University of Michigan working on Roach board now. I want to connect our own high speed ADC (~1Gsps) to Roach1 board and use it as a high speed logic analyzer. I wonder if you can help me on some questions. 1. My ADC board doesn't demux itself, i.e. it

Re: [casper] Fwd: Connecting ADC to Roach1

hi xuexiu, there are 40 LVDS pairs on each zdoc connector. there are two zdoc's on roach1 (roach 2 also has two zdocs). for roach1, you can get up to about 800 Mbit/sec per ZDOC LVDS pair with a -1 speed grade fpga. you can probably get up to 1Gbit/sec per LVDS pair if you use a -2 speed grade