As a heads up. I picked up a M12+ from fluke.I. Working well. But the little pins are a sun of a gun to work with. They are really small. So you may need to order a connector and pins. Since that would cost more then the M12 I soldered directly to the pins and added some leads.Now I can use any connector or none at all. Regards Paul WB8TSL
On Fri, Feb 18, 2011 at 2:51 PM, beale <[email protected]> wrote: > Hi Kasper, > > Thank you, your nft program looks very interesting! It turns out the local > ISP that provides my DSL, sonic.net runs a GPS-driven NTP server and I > have a pretty low and stable latency, so this may work well. To measure a > relative frequency offset, I presume that what limits accuracy is the total > length of time of the test. So with a stable latency, I should not need to > poll the server very often. > > Meanwhile I have a M12+ timing GPS and antenna on order, and am assembling > some glue logic, case, 3.0V power supply etc. I may not ever manage a > long-term GPS installation, since my apartment is surrounded by tall > obstructions, and my workplace has metallized-film window panes which block > all GPS signals, and no roof access. It has a big open parking lot, > though... I imagine using a car-mount GPS setup and sending a 1 Hz or 100 Hz > LED or laser pulse up through the window to a telescope / photodetector at > my workbench on the 2nd floor.... or maybe sending a frequency-locked 10 kHz > tone through a FM wireless mic system would be adequate. > > -John Beale > > > I did a piece of software to provide calibration to equipment-deficient > microcontroller-hobbyist frequency counter builders (think 100ppm crystal > from the bin) over ntp: > > http://n1.taur.dk/nft/nft.pdf > > /Kasper Pedersen > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
