On Tue, Oct 20, 2009 at 18:29, Jason <[email protected]> wrote: > Alexander Chemeris wrote: >> As I wrote in my previous mail, we're working on an universal clock >> source for USRP (and not only for USRP). It is based on 0.28ppm TCXO >> from Connor Winfield [1], National Semiconductor LMX2531 VCO+PLL [2] >> and LMK01000 CD [3] for clock generation and Atmel ATUSB for control. >> So far we've finished PCB design and working on production of the first >> 25 units. We'll reserve 5 of them for our own use and testing of >> different options, 8 others are requested by community people, so there >> are more then 10 left for sale. We plan to finish production at >> the beginning of Dec and take units to 26C3. If you plan to attend it, >> you have a great chance to see them, play with them and take some of >> them with you. ;) >> > > Awesome! I don't think I'll be able to swing 26C3, though. > >> As we promised, units form this experimental batch will be sold out >> for only $100 or 66EUR (without shipping). We kindly invite everyone >> interested in such unit to get one and try fitting it to your setup. >> Also we need your help determining the best feature set for the unit >> (read on for the ample list of possible features). We aim at creating >> a really flexible and cheap clocking unit, which may used by a broad >> GnuRadio community and will best fit its needs. Unit with open source >> software and open hardware. >> > > Can you post the preliminary pcb/gerber/asm files? Are you using geda/pcb, > by chance?
We will setup a website for the project and will put sources and schematics there. To date software is in embryo stage - we were busy placing unit into production to get it before 26C3. We plan to get back to it soon and will publish it then. >> Now, lets get to facts. Board dimensions are 86x44mm (3.4" x 1.7") - >> it is designed to work inside of USRP box with RFX boards installed >> with no external connections. >> >> Default distribution version includes: >> 1) Clock board with default options >> 2) U.FL to SMA cable to connect to USRP >> 3) Power cable to connect to USRP's fan connector >> >> Default board options: > > [snip] >> >> 12) 1pps external signal may be used to tame the clock to external >> GPS unit. It will be passed to ATMega's interrupt input, so you >> should keep in mind that this will need a lot of software work for >> filtering >> out jitter, generated by it. We don't plan to develop this software at >> least now, but anyone who need this is welcome to take it. >> > > This would be interesting. You're welcome to get the unit and hack this ;) -- Regards, Alexander Chemeris. _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
