[hpsdr] Gibraltar Prototyping

[Eric Ellison]

Steve

I would hope also that there be provision for an external 1 pps input from a
user supplied GPS board as well as an external VC output and 10 mhz (or
other return sig to the board for a user supplied VCXO... I been gathering
parts for one or another of these time projets like an Isotemp 10 mhz VCXO,
possibly also 'inside world connections'.

Thanks
Eric


-----Original Message-----
From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On Behalf Of
Steven Bible
Sent: Thursday, June 08, 2006 6:28 PM
To: hpsdr at hpsdr.org
Subject: Re: [hpsdr] Gibraltar Prototyping

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

As Bob has already aluded to, all these techniques have the same pricinples
involved.

I've started on Gibraltar and for first pass I was planning on the Reflock
II design with the iLotus M12M and Trimble-T GPS footprints, and for OCXO,
the Crystek and Valpey-Fisher footprints.  This way we can experiement with
each.  

I could also include a microcontroller on the PCB for added flexibility.  I
would suggest the PIC18F4550 full speed USB microcontroller.

- Steve N7HPR




-----Original Message-----
>From: "Christopher T. Day" <CTDay at lbl.gov>
>Sent: Jun 8, 2006 10:27 AM
>To: Lyle Johnson <kk7p at wavecable.com>
>Cc: hpsdr at hpsdr.org, FRANCIS CARCIA <carcia at sbcglobal.net>
>Subject: Re: [hpsdr] Gibraltar Prototyping
>
>***** High Performance Software Defined Radio Discussion List *****
>
>Exactly. That article has been in my pile for some time. I originally
>had thoughts of combining the Crystalizer kit, the Antenna Analyzer
>Temperature control for same, Shera's GPS stabilization technique and my
>cheap Delua GPS module with a 1PPS output, just to see what one could
>wind up with. However, I've been too distracted by other things so far.
>[What I just described sounds a lot like a cheapo Gibraltar, doesn't
>it?]
>
>
>	Chris - AE6VK
>
>
>-----Original Message-----
>From: Lyle Johnson [mailto:kk7p at wavecable.com] 
>Sent: Thursday, June 08, 2006 10:21 AM
>To: Christopher T. Day
>Cc: FRANCIS CARCIA; hpsdr at hpsdr.org
>Subject: Gibraltar Prototyping
>
>> I would suggest that the RefLock II could be used as a Gibraltar 
>> prototyping system similar to the way PhilH and Bill have been using
>the 
>> Xylo board for prototyping Janus.
>
>Consider also some of the techniques employed in the GPS oscillator 
>stabilization system designed by Brooks Shera 
><http://www.rt66.com/~shera/index_fs.htm>
>
>73,
>
>Lyle KK7P
>
>
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\r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
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