[hpsdr] Gibraltar Prototyping

[Alex]

One reason behind using the FX2 is that the interface design to the FPGA is already complete, plus the VHDL coding is done. Another good reason is that if we're going to have these boards assembled, we'll get better pricing on parts and assembly if we use common components. Not use varied components for each board.

REUSE REUSE REUSE (where appropriate)

Alex, N3NP

----- Original Message ----
From: Alex <harvilchuck at yahoo.com>
To: pvharman at arach.net.au; Steven Bible <n7hpr at tapr.org>; Steven Bible <srbible at earthlink.net>
Cc: hpsdr at hpsdr.org
Sent: Friday, June 9, 2006 8:53:38 AM
Subject: Re: [hpsdr] Gibraltar Prototyping

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

How about the Cypress FX2? It's a nice package, plus the design layout can  be reused from OZY-USB.

Alex, N3NP 

----- Original Message ----
From: pvharman at arach.net.au
To: Steven Bible <n7hpr at tapr.org>; Steven Bible <srbible at earthlink.net>
Cc: hpsdr at hpsdr.org
Sent: Thursday, June 8, 2006 9:11:34 PM
Subject: Re: [hpsdr] Gibraltar Prototyping

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

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
> >
> >
> >_______________________________________________
> >HPSDR Discussion List
> >To post msg: hpsdr at hpsdr.org
> >Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> >HPSDR web page: http://hpsdr.org
> >Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> 
> 
> \r\n- Steve\r\n  (n7hpr at tapr.org)\r\n
> _______________________________________________
> HPSDR Discussion List
> To post msg: hpsdr at hpsdr.org
> Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
> HPSDR web page: http://hpsdr.org
> Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/
> 



_______________________________________________
HPSDR Discussion List
To post msg: hpsdr at hpsdr.org
Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
HPSDR web page: http://hpsdr.org
Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/



_______________________________________________
HPSDR Discussion List
To post msg: hpsdr at hpsdr.org
Subscription help: http://lists.hpsdr.org/listinfo.cgi/hpsdr-hpsdr.org
HPSDR web page: http://hpsdr.org
Archives: http://lists.hpsdr.org/pipermail/hpsdr-hpsdr.org/




 1149862753.0