Is there a website where this experiement is described? I tried TAPR but couldn't find anything.
-----Original Message----- From: Robert McGwier [mailto:rwmcgwier@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 applications.
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.
http://www.cnssys.com/~w2gps/amsat_files/suitsat/
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!
73's Bob
N4HY
Try this: http://hpsdr.org/wiki/index.php?title=ODYSSEY
73, Drew KO4MA
----- Original Message ----- From: "Joe Leikhim" rhyolite@nettally.com To: amsat-bb@amsat.org; rwmcgwier@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@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 applications.
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.
http://www.cnssys.com/~w2gps/amsat_files/suitsat/
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!
73's Bob
N4HY
Thanks Drew!
Andrew Glasbrenner wrote:
Try this: http://hpsdr.org/wiki/index.php?title=ODYSSEY
73, Drew KO4MA
----- Original Message ----- From: "Joe Leikhim" rhyolite@nettally.com To: amsat-bb@amsat.org; rwmcgwier@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@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 applications.
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.
http://www.cnssys.com/~w2gps/amsat_files/suitsat/
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!
73's Bob
N4HY
participants (2)
-
Andrew Glasbrenner -
Joe Leikhim