Hi To your earlier point, there are a number of fairly low cost boards with Zynq’s on them. They aren’t into the $5 range, but they are not that much more than one of the Beagle boards.
Bob > On Aug 10, 2016, at 11:18 PM, Chris Albertson <albertson.ch...@gmail.com> > wrote: > > Thanks for pointing out the Zynq. Wow you get a dual core ARM and an > FPGA all in one package. It seems overkill for a GPSDO but not the > type you are making as you can transferring the time out of the GPSDO > using PTP. > > The Zyng looks to the the perfect platform for low-cost SDR. > > On Wed, Aug 10, 2016 at 2:30 PM, Joakim Langlet > <joakim.lang...@seaview.se> wrote: >> Dear time-nuts, >> >> My name is Joakim Langlet (SM0OET) and I just recently joined this list. As >> Brooks Shera was mentioned, I remembered that I was referenced in the >> footnotes of the original article in the QST - July 1998. It feels almost >> historical now. Brooks bought a few OCXOs from me. >> >> I am currently working on a GPS stabilized OCXO. >> It is based on a Xilinx Zynq FPGA as the processor and counter arrangement. >> The hardware is starting to take shape. The control voltage of a 20 MHz OCXO >> is set by a DAC coupling from which I hope to set the voltage in very small >> steps. >> The OCXO has a CMOS level output which is converted to LVDS and is wired to >> the FPGA board. The Xilinx Zynq take a minimum frequency of 19 MHz as input >> to the PLL of the clock tile. My intention is to scale up the clock to some >> where a bit over 200 MHz to be fed to the counters.The 1 PPS from the GPS >> receiver is also fed into the FPGA to gate the counters. >> >> The reason for my choice of processor is that I want to run Linux on it in >> order benefit from the large software base. Time distribution using PTPv2 >> and a nice web-application to visualize and control what is going on inside >> is part of the intended concept. >> >> I still have a long way to the finish line but I will try to present some >> results as I proceed. >> >> I am following what is written on this list with great interest. It feels >> good to know that I am not the only nut .... >> >> BR/ >> Joakim >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > > > -- > > Chris Albertson > Redondo Beach, California > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.