[hpsdr] High Accuracy Timing for HPSDR

Tue May 23 20:05:00 PDT 2006

Hi Alex,

Why, am I not moving fast enough :-).  Seriously, we are still learning from
Reflock II.  We have a list called time-freq that we are discussing the
Reflock II and other timing related issues (including time distribution).
To subscribe see

   https://lists.tapr.org/cgi-bin/mailman/listinfo/time-freq

At Dayton, we had a serious discussion of the design.  I have the block
diagram and will start on the schematic and PCB layout as soon as I can.
What I need is a description of the PCB.  Is their a document that describes
the diamensions and connectors (part numbers) that one can use to get
started quickly?  If not, it would be a good document to have for anyone
starting a board design.

73,

- Steve, N7HPR
 (n7hpr at tapr.org)

> -----Original Message-----
> From: Alex [mailto:harvilchuck at yahoo.com]
> Sent: Tuesday, May 23, 2006 2:00 PM
> To: Steven Bible; hpsdr at hpsdr.org
> Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
>
>
> Steve,
> So what can we do to "step-on-the-gas" with GIBRALTAR?
>
> Alex, N3NP
>
> ----- Original Message ----
> From: Steven Bible <n7hpr at tapr.org>
> To: hpsdr at hpsdr.org
> Sent: Tuesday, May 23, 2006 11:00:58 AM
> Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Alex,
>
> I am in favor of an open project in the same spirit as HPSDR.
>
>
> 73,
>
> - Steve, N7HPR
>  (n7hpr at tapr.org)
>
>
> > -----Original Message-----
> > From: Alex [mailto:harvilchuck at yahoo.com]
> > Sent: Monday, May 22, 2006 6:35 PM
> > To: Rick Hambly (W2GPS); Steven Bible
> > Cc: hpsdr at hpsdr.org
> > Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
> >
> >
> > Rick & Steve,
> > I'm happy to coordinate the activity for GIBRALTAR. One question
> > for both of you is going to be surrounding your artwork and
> > interface circutry. What is your preferred licencing for usage of
> > the IP for this project?
> >
> > Alex, N3NP
> >
> > ----- Original Message ----
> > From: Rick Hambly (W2GPS) <w2gps at cnssys.com>
> > To: Steven Bible <n7hpr at tapr.org>
> > Cc: hpsdr at hpsdr.org
> > Sent: Monday, May 22, 2006 4:38:13 PM
> > Subject: Re: [hpsdr] High Accuracy Timing for HPSDR
> >
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > 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
> > > >
> > > >
> > > >_______________________________________________
> > > >HPSDR Discussion List
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> >
> >
> > \r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
> > _______________________________________________
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> >
>
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