[hpsdr] High Accuracy Timing for HPSDR

Tue May 23 22:41:08 PDT 2006

Steve,

100mmx100mm with right angle 96 pin DIN-41612 male connector for Atlas.
Something like Mouser part # 571-2156054.

http://hpsdr.org/wiki/index.php?title=HpsdrWiki:Community_Portal#JANUS_-
_ADC.2FDAC_Board for typical layout. 

http://www.needles.de/pics/Atlas_Bus_Def.pdf for Atlas bus definitions
so far. Note that there is JTAG on the bus and your board probably
should assume it will have its configuration file loaded over that JTAG.
This also implies that there should be a JTAG turn-around jumper on the
board to help define who is last in any given particular box.

A 1-Wire EEPROM should also be there for board class id and serial
number. Lyle is has the dope on those, I think. There is a 3-pin version
in a discrete transistor epoxy package which wouldn't take much real
estate.

	Chris - AE6VK

-----Original Message-----
From: Steven Bible [mailto:n7hpr at tapr.org] 
Sent: Tuesday, May 23, 2006 8:05 PM
To: hpsdr at hpsdr.org
Subject: Re: [hpsdr] High Accuracy Timing for HPSDR

***** High Performance Software Defined Radio Discussion List *****

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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>

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