[time-nuts] difference between Oncore M12 and M12+T (useful when buying online)

[paul swed]

Thanks Rick had no idea

On Wed, Mar 9, 2011 at 2:04 PM, Rick Hambly (W2GPS) <w2gps at cnssys.com>wrote:

>
> Every now and then I see e-mails like these. I would like to remind
> everyone that Synergy Systems, the USA distributor for the M12 series
> receivers, offers Ham Radio and Educational (time nuts) users a new M12M
> with the precision time firmware and an on board battery for only $59.18
> with the 10% Ham/Edu discount (sown from $65.75). This unit also includes
> both Motorola binary and NMEA message formats.
>
> Synergy can be found at www.synergy-gps.com or at (858) 566-0666. They
> have been very good to the Ham and educational communities for many years.
>
> Rick
> W2GPS
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of paul swed
> Sent: Saturday, March 05, 2011 3:06 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] difference between Oncore M12 and M12+T (useful
> when buying online)
>
> 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 <beale at 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
> >
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> >
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