[amsat-bb] Re: [hpsdr-dev] Odyssey Siren A success
glasbrenner at mindspring.com
Wed Mar 14 18:20:35 PST 2007
Try this: http://hpsdr.org/wiki/index.php?title=ODYSSEY
73, Drew KO4MA
----- Original Message -----
From: "Joe Leikhim" <rhyolite at nettally.com>
To: <amsat-bb at amsat.org>; <rwmcgwier at gmail.com>
Sent: Wednesday, March 14, 2007 9:55 PM
Subject: [amsat-bb] [hpsdr-dev] Odyssey Siren A success
Is there a website where this experiement is described? I tried TAPR but
couldn't find anything.
From: Robert McGwier [mailto:rwmcgwier at gmail.com]
Sent: Tuesday, March 13, 2007 2:36 PM
To: High Performance Software Defined Radio Discussion List
Cc: amsat bb
Subject: [hpsdr-dev] Odyssey Siren A success
We had a complete breakthrough on the Odyssey Siren in the past two
weeks. It will be used in Suitsat 2, in a terrestrial linear repeater
experiment by Viktor Kudielka OE1VKW and friends, who supported its
development, and we are already leaping all over the place to
Frank Brickle and I will be doing our SDR code on it over the next
several days. The board as shown in the schematic needs some
modifications to fix the 3 - ish volt power supply for the Codec and a
modified oscillator circuit but we are certain it will all work now.
On the 10.7 MHz IF, I measured 0 dBm max into a 50 ohm load and less
than -120 dBm MDS and > 80 dB dynamic range. This is with a BOM of <
$50 in parts and about a $20 dsp pic chip!
Yesterday in Rick's lab, with W2GPS, K3IO, we made the above
measurements, hacked on code and turn the thing into a bent pipe
transponder. I also did the hilbert transform to make it an inverting
transponder. It all worked perfectly.
has detected audio in an SDR-IQ SDR as well as captured IF from the
SDR-IQ of the transponder. We have to balanced for image and do DC
offset correction but the thing works and sounds great as you can hear
Joe Leikhim K4SAT
"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."
"Follow The Money" ;-P
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB