Re: [Xylo-SDR] RFC - Motherboard

[pvharman@arach.net.au]

Chris,

I've drawn a block diagram of the Janus board and if someone will tell me how 
to get it somewhere everyone can access it I will post it since attachements 
don't seem to work.

Phil...



Quoting "Christopher T. Day" <CTDay@lbl.gov>:

> Sorry, could someone post a brief description of what's on the Janus and
> what's on the Lionhart? I've lost track. Thanks.
> 
> 
> 	Chris - AE6VK
>  
> 
> -----Original Message-----
> From: Philip Covington [mailto:p.covington@gmail.com] 
> Sent: Tuesday, January 24, 2006 8:27 PM
> To: Xylo-SDR Discussion
> Subject: Re: [Xylo-SDR] RFC - Motherboard
> 
> On 1/24/06, Eric Ellison <ecellison@comcast.net> wrote:
> > Phil
> >
> > You are right. I ceased to panic after the first flurry on that
> matter.
> > FPGA's in the capability range we are talking about are not that
> expensive.
> >
> > However, in this exchange which you have explained well right here:
> >
> > If you used ALL the resources on the Lions 'heart' can you do what you
> 
> > are planning below? Your project does NOT have to co-exist with any 
> > others, just a different FPGA program and leverage of programs in 
> > common with other projects like FX2. Other slots used for the BPF 
> > board etc. If so, that WOULD make the daughter card + Buss concept 
> > viable. After all the Janus is a totally different project, and will
> never need to co-exist with your radio!
> > It would also make the Lionheart a little more flexible in that it 
> > would allow for a 'squatter'. I realize it depends on physical space, 
> > but 'squatting' on cleverly spaced pins could do it. Nothing has all 
> > that much height, in any of these projects except front panel stuff.
> >
> > Just wondering.
> >
> > Eric
> 
> Eric,
> 
> Actually the Janus will probably be a part of my project.  I will need a
> way to get audio out for RX and audio in for TX - I'll need at least the
> TI CODEC part of it.  Also, I can envision having both a LTC2208 board
> and a QSD based board in one radio.  The LTC2208 could be used to scan
> big chunks of spectrum and direct the QSD based board to tune to a
> signal of interest while the LTC2208 continues the scan.  I also need to
> be able to decode command signals via USB to an IO controller board -
> that function will be handled by the Lionheart board.
> 
> Phil C
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