[hpsdr] wiki - HERMES

[Henry Vredegoor]

Hi Richard, Kevin,

Richard, I think you are doing a wonderful job for the Wiki pages.
I read the Wiki page about Hermes and I think that collecting the various
comments and design decisions and keeping them at a single place is a very
good idea!

Kevin, my thoughts on Hermes:

Form factor / Casing:

I think one of the aims of creating Hermes in the first place was to have a
kind of "stand-alone", compact, Penny/Mercury/Ozy setup?
So not the Atlas-bus interface and -connector requirements/overhead.

Then why stick to the default form-factor of Atlas/HPSDR (Eurocard) board
size of 200 X 100 mm. ?
For a stand alone and "mobile" use, maybe a different form factor could be a
better choice?

What about a mini-ATX form-factor of 170 X 170 mm.?
This could possibly make using (mobile/Car) mATX-PC casings and 12(13.8)
Volt PSU's etc. a nice and cheap(-er) option.
This slightly bigger size could also provide some extra space required for
the small PA idea.
A companion mATX-PC (e.g. An Intel Atom based mATX-PC board) in the same
type casing would make a nice set.

Mobile/remote use:

It would be nice for mobile/remote use if the power supply input voltage
range could be extended to say from as low as 10-11 Volts and up to 14-15
Volts (typ. 12 Volts)
This would require some voltage up-conversion for the +12 Volt supply (if
the input voltage is at its lowest spec voltage of 10-11 Volts) since the +5
V, +3,3V are probably regulated down from the higher supply input voltage.

Just my 2 cents....



Henry.







> -----Original Message-----
> From: hpsdr-bounces at lists.openhpsdr.org 
> [mailto:hpsdr-bounces at lists.openhpsdr.org] On Behalf Of Richard Ames
> Sent: zondag 24 mei 2009 6:34
> To: Kevin Wheatley
> Cc: HPSDR list
> Subject: [hpsdr] wiki - HERMES
> 
> 
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Kevin -
> 
> I have taken the liberty of changing the HERMES wiki page 
> (quite a bit)
> and moving the discussion to a separate page...  also put recent
> comments into the discussion page.
> 
> I hope it is useful....  when the discussion is over it becomes the
> achieve of the design discussions and can be refered to as 
> history... at
> the moment interested people are being asked to comment....
> 
> see: http://openhpsdr.org/wiki/index.php?title=HERMES 
> 
> Regards,
> 
> Richard.
> 
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