[image: 20250711_110655.jpg]

This is a carrier board that mates a Jetson Orin Nano along with an
advanced software-defined radio (SDR).

I'm sure we'll see more of these in 4 years, but not yet.  Typically the
things I work on don't exist anywhere else, and this is no exception.  This
is the second of these boards that have ever been built and it does
something very unique.

[image: carrier.png]

That's some of the layout in my CAD software.  Some of the signals on this
board are so fast (10 gigbits per second) we have to calculate how long
it'll take the electrons to go from one end of the board to the other and
use that information to adjust the exact lengths of the signal traces, to
within a few pico-seconds (i.e. trillionths of a second).  It takes about
165 pico-seconds per inch, depending on what material you use and what's
above and below your signal traces.

We don't start off with the rules that govern these things, there's nothing
off the shelf here.  We have to do the research, do the math, then define
the rules ourselves and make sure we stay within them and hope we didn't
miss anything.

Regards,
Thomas Pownall

CADX Services, Inc.

Tel: 585-624-1491 X101
Fax: 585-582-1101
E-Mail: tpownall@cadxservices.com
Web: http://www.cadxservices.com

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