[hpsdr] High Accuracy Timing for HPSDR

[Christopher T. Day]

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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