[hpsdr] Atlas Update - From whence we have come

[Bill Tracey]

Some comments inline.

Regards,

Bill (kd5tfd)

At 11:07 PM 5/8/2006, Alex wrote:
><....>
>Is a 10MHz or a 1pps reference signal going to be supported? If so, it it 
>going to be distributed over the backplane?

It is my intent to bring a 1pps signal into the Ozy/Xylo/Lionheart thing 
and to do code for it to reference count a signal - I do not know if this 
will be via a

>Does OZY have the throughput to handle both a MERCURY and a JANUS board 
>operating at the same time?

Don't know, but suspect it will.  The GNUradio USRP folks can get 32 
MBytes/second over the USB bus with the setup they have that is essentially 
the same parts we're looking at for Ozy (least I think they are -- Phil C 
would be the one to know for sure).  They are open soruce as well so we can 
always flatter them and use some of their code.



>What the project need is some design documentation, so that folks who want 
>to design a curcuit know how to integrate it in. I'd be tickled pink with 
>some block diagrams!

Some more doco would certainly be good.  Will be hard to come up with a 
whole system block diagram as we are not building a single system - we're 
building a set of configurable hardware blocks that can be put together 
into a system with appropriate CPLD and FPGA images on the blocks.


>So, yes, I would hold my order until the group has a baselined design for 
>JANUS, OZY and ATLAS. JANUS is going through a redesign currently! If I 
>have to I'll run a set of boards myself.

Not sure Janus is doing a total redesign, just changing the CODEC ... 
basically a good thing in that we did not succumb to 'go fever' until we 
check out the last chip that hopefully will work out to 192khz

>I am more than happy to work on documentation, but it's going to take lots 
>of questions and the corresponding answers.
>A valid answer to a question can be "we don't know yet".



>Alex, N3NP



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