[amsat-bb] Re: [hpsdr-dev] Odyssey Siren A success
rhyolite at nettally.com
Wed Mar 14 18:26:09 PST 2007
Andrew Glasbrenner wrote:
> 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.
> -----Original Message-----
> 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
> for yourself!
Joe Leikhim K4SAT
"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."
"Follow The Money" ;-P
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