Thanks for the PDF files. Joe Gray W5JG
On Sun, Jun 27, 2010 at 5:46 PM, Stanley Reynolds <stanley_reyno...@yahoo.com> wrote: > done > > www.n4iqt.com/picticii/circuit.jpg > > www.n4iqt.com/picticii/PICTICII.bmp > > both above as pdf > > www.n4iqt.com/picticii/circuit-pcb.pdf > > Stanley > > > > ----- Original Message ---- > From: Joseph Gray <jg...@zianet.com> > To: Discussion of precise time and frequency measurement <email@example.com> > Sent: Sun, June 27, 2010 6:01:28 PM > Subject: Re: [time-nuts] PICTIC II > > As asked by another, please post a PDF of the schematic. I don't have > any software installed that can read the files you posted. > > Joe Gray > W5JG > > On Sun, Jun 27, 2010 at 3:54 PM, Magnus Danielson > <mag...@rubidium.dyndns.org> wrote: >> On 06/26/2010 09:11 AM, Richard H McCorkle wrote: >>> >>> Fellow Time-Nuts, >>> When I first uploaded the Simple PICTIC interpolating time interval >>> counter to the K04BB site in 12/08 and presented it to the group as >>> a Christmas present my goal was to get amateurs building their own >>> interpolating time interval counters for GPS monitoring and making >>> improvements to my design. The interpolator in the PICTIC was >>> “borrowed” from an early HP counter with minor modifications so I >>> didn’t design it and had no personal attachment to it. >> >> Which counter? Just curious. >> >>> Over the last 18 months I have developed a new diode switched >>> interpolator based on the comments made on line and have thoroughly >>> tested it. Some suggestions made improvements in the performance and >>> some resulted in poorer performance. I incorporated those suggestions >>> that made improvements, eliminated those that made things worse, and >>> once I was satisfied I sent the revised interpolator design directly >>> to Bruce off line. Based on comments and suggestions he returned >>> during a long series of emails I incorporated additional changes in >>> the code, front-end, and interpolator designs and tested those >>> changes until I was satisfied with the performance and he had no >>> further comments. I am finally satisfied with the new design and >>> admit that by incorporating the majority of the suggestions made >>> the new interpolator has significantly better linearity than the >>> HP interpolator used in the PICTIC and it is now suitable for >>> higher resolutions. >>> I was reluctant to post the PICTIC II in this forum, as I don’t >>> want to get in another public discussion of its faults without any >>> discussion of the merits of a $50 serial output interpolating TIC >>> on a 3.8” x 2.5” thru-hole board designed for amateur construction. >>> The K04BB WIKI PICTIC page was recently updated to include the >>> PICTIC II code and ExpressPCB board layout and schematic files for >>> those that might be interested. >>> >>> http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:pictic >>> >>> The PICTIC II incorporates the new interpolator, requires a delay >>> between the inputs, and uses a low stability XO timebase with >>> software peak detection for calibration with provision for an >>> external timebase like the PICTIC to minimize size and cost. >> >> Sounds interesting. What is the ball-park figures? Resolution, jitter, >> linearity? >> >> Cheers, >> Magnus >> >> _______________________________________________ >> time-nuts mailing list -- firstname.lastname@example.org >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > _______________________________________________ > time-nuts mailing list -- email@example.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- firstname.lastname@example.org > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.