hi gerry, there are three adc chips and 12 analog inputs on the snap board (no zdoc needed).
each of these three adc's can be configured as a) quad adc, for a total of 12 inputs at 250 Msps, or b) dual adc, for a total of 6 inputs at 500 Msps, or c) single adc, for a total of 3 inputs at 1Gsps, best wishes, dan On Thu, Feb 13, 2014 at 5:54 PM, Gerry Harp <[email protected]> wrote: > Hi Dan and all > > This looks very cool. There is something in the specs I don't understand: > > > - Analog signal: 50 ohm single-ended configurable as three of: > - 4 inputs at 250 Msps > - 2 inputs at 500 Msps > - 1 input at 1 Gsps > > How many analog inputs are there to feed the ADC's? 12? > > And some of them come in on the ZDOC connector? How many on board? > > Sorry if the answer is obvious, I didn't find the answer myself. > > Gerry > > > > On 2/10/2014 7:58 AM, Dan Werthimer wrote: > > > > hi tim, > > there is a low power, low cost, roach like board under development, > called SNAP. SNAP uses a kintex fpga, > has two 10Gbit ports, some adc's and frequency synthesizer on board, > and one zdoc for external adc's. info at: > > https://casper.berkeley.edu/wiki/DAB-HERALD > > > best wishes, > > dan > > > > > > On Mon, Feb 10, 2014 at 7:20 AM, Madden, Timothy J. > <[email protected]>wrote: > >> >> >> Roach in a balloon.... >> >> Just an idea if some engineer wants alot of work to do. One could put a >> whole ROACH into a tiny circuit board these days using the new Xilinx ZYNQ >> chips. It is a multi-chip module w/ high end Xilinx and 2 ARM cores. It >> would of course require recompiling all the ROACH IP for use w/ ARM. But >> the resulting hardware would be small, and not use alot of power. It would >> be a fun project. >> >> >> Tim Madden >> Argonne Lab >> >> ________________________________________ >> From: [email protected] [ >> [email protected]] on behalf of >> [email protected] [[email protected]] >> Sent: Friday, February 07, 2014 2:15 PM >> To: [email protected] >> Subject: casper Digest, Vol 75, Issue 8 >> >> Send casper mailing list submissions to >> [email protected] >> >> To subscribe or unsubscribe via the World Wide Web, visit >> >> https://calmail.berkeley.edu/manage/list/listinfo/[email protected] >> >> or, via email, send a message with subject or body 'help' to >> [email protected] >> >> You can reach the person managing the list at >> [email protected] >> >> When replying, please edit your Subject line so it is more specific >> than "Re: Contents of casper digest..." >> >> >> Today's Topics: >> >> 1. ROACH on a balloon? (Ben Mazin) >> >> >> ---------------------------------------------------------------------- >> >> Message: 1 >> Date: Fri, 7 Feb 2014 11:22:20 -0800 >> From: Ben Mazin <[email protected]> >> Subject: [casper] ROACH on a balloon? >> To: [email protected] >> Message-ID: <[email protected]> >> Content-Type: text/plain; charset="us-ascii" >> >> Has anyone flown a ROACH board on a high altitude balloon? Did it work? >> Did you make any engineering changes for this challenging environment? >> >> Thanks, >> Ben >> __________________________________________________________________ >> Ben Mazin Phone/Fax: 805-893-3344 >> Assistant Professor http://www.physics.ucsb.edu/~bmazin/ >> Department of Physics Skype: ucsb.physics.mazin_b >> University of California Office: 2015A Broida Hall >> Santa Barbara, CA 93106 USA Lab: 3509 Broida Hall >> >> -------------- next part -------------- >> An HTML attachment scrubbed and removed. >> HTML attachments are only available in MIME digests. >> >> End of casper Digest, Vol 75, Issue 8 >> ************************************* >> >> > > -- > ---------------------- > Gerald R. Harp, Ph.D. > Director, Center for SETI Research > SETI Institute > >
