[hpsdr] High Accuracy Timing for HPSDR

Alex harvilchuck at yahoo.com
Mon May 22 18:34:58 PDT 2006 

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
> >
> >
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>
> \r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
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