[hpsdr] High Accuracy Timing for HPSDR

Tue May 23 07:58:56 PDT 2006

Hi Rick,

This is great.  With a source of Trimble timing GPSs, we can put both
footprints on the PCB.

73,

- Steve, N7HPR
 (n7hpr at tapr.org)

> -----Original Message-----
> From: Rick Hambly (W2GPS) [mailto:w2gps at cnssys.com]
> Sent: Monday, May 22, 2006 1:38 PM
> To: 'Steven Bible'
> Cc: hpsdr at hpsdr.org
> Subject: RE: [hpsdr] High Accuracy Timing for HPSDR
>
>
> Steve,
>
> I recommend that we plan for a primary and a backup GPS timing
> engine. In my
> commercial product, the CNS Clock II, I now use overlaying
> footprints for an
> M12 (Motorola M12+ or iLotus M12M) and a Trimble Resolution-T. The Trimble
> is less expensive than the M12+ or M12M and uses a different set of
> languages (TSIP and TAIP plus NMEA) but it has all the right features,
> including the quantization (sawtooth) correction data. See
> http://www.trimble.com/resolutiont.shtml.
>
> I will commit to updating the Tac32 family of software products to support
> the Resolution-T in a timely fashion, as I need to do that sooner or later
> anyway.
>
> I will make available the artwork and interface circuitry from my
> commercial
> product to simplify the development of this board, if you like.  Perhaps I
> could do more but I am still trying figure out who is doing what and to
> evaluate the options for my participation on this project.
>
> I have an account with Trimble and will procure any number of these
> receivers for the project at cost if that is interesting. I will
> need to get
> updated price information.
>
> Rick
> W2GPS
> AMSAT LM2232
>
>
> -----Original Message-----
> From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On
> Behalf Of
> Steven Bible
> Sent: Wednesday, May 17, 2006 11:26 PM
> To: hpsdr at hpsdr.org
> Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Chris,
>
> Yep, Achim mentioned this a couple of days ago on this list.  It is
> expensive at $179.00 each.  But it is a possibility.  The only other thing
> to consider is the software to configure and run it, such as
> TAC32 does for
> Motorola and Garmins.
>
> 73,
>
> - Steve, N7HPR
>  (n7hpr at tapr.org)
>
>
> > -----Original Message-----
> > From: Christopher T. Day [mailto:CTDay at lbl.gov]
> > Sent: Wednesday, May 17, 2006 5:08 PM
> > To: Steven Bible; hpsdr at hpsdr.org
> > Subject: RE: [hpsdr] High Accuracy Timing for HPSDR
> >
> >
> > Steve,
> >
> > Would this module be suitable? I stumbled across it and know nearly
> > nothing about what's desirable, but it does say "timing module" and
> > makes claims similar to those for the ublox LEA-4T.
> >
> >
> > 	Chris - AE6VK
> >
> >
> > P.S. - RefLock II complete. Thanks for you help.
> >
> > P.P.S. - Anyone know where to find any technical information about the
> > Deluo GPS WAAS for Laptop device?
> >
> >
> > -----Original Message-----
> > From: Steven Bible [mailto:srbible at earthlink.net]
> > Sent: Wednesday, May 17, 2006 4:32 PM
> > To: hpsdr at hpsdr.org
> > Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
> >
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > Hi Achim,
> >
> > I know the Crystek folks.  If we can get a large order, we can bring the
> > price down.  It was my encouragement that got them to offer the OCXO as
> > a catalog order item.  Normally, OCXOs are build to order.  I've got
> > quotes from several companies and the prices include NRE.  So this is a
> > bargin, so to speak.
> >
> > Buying HP 10811's surplus on eBay, I've spent easily $175.00 for one!
> > Having a source is important.
> >
> > I am always open for ideas.
> >
> > - Steve N7HPR
> >
> >
> >
> > -----Original Message-----
> > >From: Achim Vollhardt <avollhar at physik.unizh.ch>
> > >Sent: May 17, 2006 6:58 PM
> > >To: hpsdr at hpsdr.org
> > >Subject: [hpsdr]  High Accuracy Timing for HPSDR
> > >
> > >***** High Performance Software Defined Radio Discussion List *****
> > >
> > >Hi Steven,
> > >just checked with Mouser for the OCXO you listed.. 260 bucks for single
> >
> > >quantity? Can't be true.. can it?
> > >
> > >73s Achim, DH2VA
> > >
> > >> Hi Alex,
> > >>
> > >> I'd be willing to help with this board since I was the one that laid
> > out the
> > >> Reflock II PCB.
> > >>
> > >> As to a GPS engine, we need to look for a timing GPS.  A timing GPS
> > can
> > >> perform a self survey and then lock its position for a more accurate
> > 1PPS
> > >> signal.  The older 8-channel Oncode UT, UT+, and VP, or the newer
> > 12-channel
> > >> M12, M12+, and M12+ Timing have been timing GPS of choice for hams
> > since we
> > >> could buy them and using W2GPS's TAC32 program to operate them.
> > Since
> > >> Motorola sold off its Oncore line to SiRF, and the dust is about to
> > settle,
> > >> the M12 line will come out later this year as the M12M.
> > >>
> > >> I have already started on a PCB that integrates the GPS, Reflock II,
> > and 10
> > >> MHz OCXO (I am looking at the Crystek CO27VH15DE-12-10.000 available
> > from
> > >> Mouser).  The goal I have is to design the board such that all the
> > parts can
> > >> be readily purchased.  I really don't want to rely on surplus GPSs
> > and
> > >> OCXOs.  This entire lash up will be tested in N8UR's timing lab.  The
> > GPS
> > >> footprint would accomidate the Oncore UT/VP and M12 GPSs.  So if you
> > can
> > >> populate which ever one you have on hand, or can purchase surplus or
> > a new
> > >> M121M.
> > >>
> > >> 73,
> > >>
> > >> - Steve, N7HPR
> > >
> > >
> > >_______________________________________________
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> >
> >
> > \r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
> > _______________________________________________
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>
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