[hpsdr] Gibraltar Prototyping

[Steven Bible]

Hello Phil,

Roger all.  I'll be using the C18 compiler.

The idea is to add some flexibility to Gibralter as ideas come flooding in
:-).

73,

- Steve, N7HPR
 (n7hpr at tapr.org)


> -----Original Message-----
> From: pvharman at arach.net.au [mailto:pvharman at arach.net.au]
> Sent: Thursday, June 08, 2006 6:12 PM
> To: Steven Bible; Steven Bible
> Cc: hpsdr at hpsdr.org
> Subject: Re: [hpsdr] Gibraltar Prototyping
>
>
> Hi Steve,
>
> That sounds like a good plan. I started to use the 18F4550 as a
> way of getting
> an A/D to USB converter going but because of all the problems I
> ended up using
> the FX2 and FPGA.  The 18F4550 does work OK but be aware of a couple of
> things.
>
> 1. You need to run all your code in a state machine so you
> frequently service
> the USB hardware.
> 2. If you intend to use the USB function of the 18F4550 then check the C
> compiler support. I strongly suggest that you avoid the FED
> product, that is
> what I tried to use and it was full of bugs.
>
> 73's Phil...VK6APH
>
>
>
>
>
> Quoting Steven Bible <srbible at earthlink.net>:
>
> > ***** 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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>
>
>


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