[hpsdr] Janus/Ozy sandwhich?

[Jerry Flanders]

Hi Joe

I think the pioneers have tested the Ozy/Janus development boards 
using the Atlas. Running W/O the Atlas would be in a "non-tested" 
mode. Probably work OK, but if you had problems you couldn't be sure 
your configuration was OK.

In the early days of microcomputers I had one that suffered from 
"ringing" on the bus. Needed special terminations to avoid problems 
caused by the ringing. Stuff like that happens - if your 
configuration did this you probably would have weirdness and wouldn't 
know the cause.

If I wanted an unusual configuration I would get it working first in 
the conventional setup, then changeover.

Jerry W4UK

At 12:31 PM 2/20/2007, you wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Thinking about the janus/ozy combo specifically used with the 
>SDR-1000 and how best to efficiently (from a space required point of 
>view) mate them I have the following questions:
>
>The Atlas board is designed to hold 6 modules, which seems total 
>overkill if only 2 are going to be used. Is it possible to mount 
>only the two connectors closest to the power connector and cut the 
>Atlas board beyond the second connector to create a shortened Atlas 
>dedicated to holding only these 2 modules? If so, where best should 
>the board be cut?
>
>Along those same lines (and this may be way off base - spatial 
>visualization is not my forte) is it possible to do without Atlas by 
>replacing the euro-connectors on the Ozy and Janus boards by 2 
>straight (not 90 degree) connectors, one male and one female, and 
>mate them directly? To match up the pins, one of the boards would 
>need the connector mounted on "the other other side" of the board. 
>Is there room on the board to allow for this? Will the holes in the 
>board line up correctly for a straight connector?
>
>Of course, power would also need to be fed correctly to the boards, 
>but could this not be accomplished by connecting the +12V, -12V, +5V 
>and ground lines to the appropriate pins on one of the boards?
>
>I understand that TAPR will only manufacture boards designed to 
>connect to Atlas, so even if it were possible to directly mate the 
>boards by removing the mounted connectors and replacing them with 
>straight connectors, a shortened Atlas may be a better option?
>
>Just thinking out loud. Would appreciate some comments from those with boards.
>
>73 de Joe - AB1DO


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