Indeed its not easy to tell whats, what either until you paid for it. I purchased from Fluke.I and my modules is a M12 +. But who knows maybe I was just lucky. Regards Paul WB8TSL
On Sat, Mar 5, 2011 at 5:15 PM, John Beale <be...@bealecorner.com> wrote: > In case anyone else is shopping online for a used Motorola Oncore M12+T > timing GPS, it's probably useful to know what I just learned: > > Some online sellers offering "M12+T 100 pps GPS" may instead send you a M12 > Navigation (non-timing) GPS. The differences: > > Motorola Oncore M12 Navigation GPS: > --- > * Supports Motorola Binary and NMEA output > * does not have 100 Hz output > * does not have TRAIM (Timing Receiver Autonomous Integrity Monitor) > * does not have sawtooth correction output > * 1 PPS <500 ns timing > > crystal nearest MMCX antenna connector is two-lead can style with bent > leads for surface mounting > example p/n label: P183T12N12 (final "N" = "Navigation"?) > > photos: > http://www.wa5rrn.com/GPS%20Other/Motorola%20M12/m12.pdf > https://picasaweb.google.com/bealevideo/GPS#5580118907079326290 > > Motorola Oncore M12+T Timing GPS: > --- > * Supports Motorola Binary output only > * 1 Hz or 100 Hz output selectable > * TRAIM (Timing Receiver Autonomous Integrity Monitor) > * sawtooth correction ("clock granularity") message available > * 1 pps <2nS 1 Sigma, <6nS 6 Sigma (using sawtooth correction message) > * 1 pps <10nS 1 Sigma, <20nS 6 Sigma (without correction) > > smaller leadless surface-mount crystals > example p/n label: P283T12T17 (final "T" = "Timing"?) > > photos: > http://www.wa5rrn.com/GPS%20Other/Motorola%20M12/m12plusbrochure.pdf > http://cgi.ebay.co.uk/ws/eBayISAPI.dll?VISuperSize&item=290308535362 > > _______________________________________________ > 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.