[hpsdr] [ATLAS] Is 6 slots enough?

Thu May 11 18:43:26 PDT 2006

Chris

Thanks, I'll take a look at your alpha board when I get it...

Folks: Chris has sent me his Alpha Atlas board including all lights, power
supplies and connectors for Lyle to use in his presentation at Dayton in our
SDR Forum! Lyle will be presenting all our interests at Dayton! Looks like
that job is going to be a work in progress right up till the last minute!
Thanks Chris for furthering this phenom, and being a valuable leader in the
'hpsdr village'.

I am not sure that leaving the end mounted connectors off will allow an end
to end daisy chain of boards, and would be a kludge in any respect. I would
prefer a future Atlas design with more slots, or a better daisy chain design
which we suggested with rear mount power connectors before Phil_C posted his
current slick design. On that Teamspeak Xylo forum, we had good ideas but
were 'flopping around'. The design was 4 slots at the time so that it would
fit in my beloved Aria Mini-itx enclosure (the drift at the time).
Subsequently Phil_C came out with the current design which appeared to have
enough slots for the HPSDR. (And blew my Aria out of the water, as an
enclosure (drat! (smile)))

At this point in the design cycle, with the Atlas already alpha tested and
qualified. I am for sticking with 6 connectors until someone puts some
organization to the pleasurable chaos of proposed add on's.

What I think we need now, is a logical argument why we CAN'T do all the
stuff suggested with six slots? I SURELY can see an Atlas>Ozy>Gibralter as a
stand alone time/frequency reference accessory in my shack!

The Atlas is the foundation of EVERYTHING we do, unless we connect boards
for GPIO across the top of all the proposals we should restrain ourselves to
this design. The 'future' of radio is always tomorrow, and I can visualize
it. For today, with good design, six slots is enough, (More than my feeble
brain can associate! I am on Overload in the past 100 messages or so
anyway!)

I say let's hang right in there with the current Alpha proven design and be
as efficient as we can distributing resources on the Project boards.

Eric - AA4SW

-----Original Message-----
From: Christopher T. Day [mailto:CTDay at lbl.gov] 
Sent: Thursday, May 11, 2006 8:09 PM
To: Eric Ellison; Philip Covington; High Performance Software Defined Radio
Discussion List
Subject: RE: [hpsdr] [ATLAS] Is 6 slots enough?

Eric,

Couldn't one make an expander Atlas just by leaving off the ATX
connector and then use a jumper board? I don't remember that anything
else is in the way. [My board is on tour, so I can't look at it.] 

As for more than one Atlas project, I'd be surprised at this point if
very many people populated their Atlas boards with exactly the same set
of component boards. But that's a _good_ thing. Not to say that getting
definitions of common usage on the backplane isn't coming up fast as a
requirement for orderly progress.

	Chris - AE6VK

-----Original Message-----
From: Eric Ellison [mailto:ecellison at comcast.net] 
Sent: Thursday, May 11, 2006 4:41 PM
To: 'Philip Covington'; 'High Performance Software Defined Radio
Discussion List'
Subject: Re: [hpsdr] [ATLAS] Is 6 slots enough?

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

Phil

As a non-tech I would say no. Stay with 6 slots. The original brain
storming
on the Atlas board done pretty much by Cecil, Phil_H and I on teamspeak
suggested putting the power connectors on the longitudinal side of the
board, away from the proposed PC L-bracket side allowing end to end
'stacking' of more than one board giving 10 slots in a stack of 2 (we
were
thinking 4 slots at the time which would be ^2 per). Just have to use
right
angle DIN connectors to connect boards. I think we realize that this
creates
a 'bump' in more ways than one, but would allow for more slots. The
'second'
board wouldn't be project board addressable, but would have the
'through'
buss lines. Current Atlas design with end mounted power connectors does
not
allow that.

At this point, considering most potential products, 6 should be
sufficient
for a stand alone radio, if we distribute resources and carefully plan
the
project board distributed load.

It looks to me like we are into multiple 6 slot Atlas projects.

Thanks
Eric

-----Original Message-----
From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On Behalf
Of
Philip Covington
Sent: Thursday, May 11, 2006 4:51 PM
To: High Performance Software Defined Radio Discussion List
Subject: [hpsdr] [ATLAS] Is 6 slots enough?

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

Hi group,

Is the 6 slots of the curent ATLAS design enough?  Since there are
only three ATLAS alpha boards in existence should we add more slots to
the design?  If so how many?  8 slots?  10 slots?

Another option would be to design some kind of bridge between two
ATLAS boards.  Depending on how the ATLAS boards are mounted we could
have a pretty simple PCB that connects a slot on each of the ATLAS
boards together... two ATLAS boards would give us 10 slots for
example.  Maybe this could be part of an IO board design so we would
really have 11 slots?

Or do we just provide some way to interconnect only certain signals
between ATLAS boards so each might have their own OZY or SASQ boards?

73 de Phil N8VB
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