Technical question AO-51
Hey fellow sat-hams,
I have a few technical question about AO-51.
1) In V/S mode What is the average output power? 2) What kind of antenna is used on 2.4GHz and 1.3Ghz? 3) What is the sensitivity of the 1.3Ghz receiver? 4) Some where I reeded that AO-51 has an HF receiver? If it true, for what is the purpose?
This is just a couple of things, I'm thinking about . I thank very much for any answer on the questions.
73
Robin Theunis ON8RTH
Robin Theunis wrote:
- In V/S mode What is the average output power?
About 1.5 watts.
- What kind of antenna is used on 2.4GHz and 1.3Ghz?
A dual band antenna built by Stan Wood WA4NFY. http://n4hy.smugmug.com/AMSAT/AO-51-ECHO/Antennas/
- What is the sensitivity of the 1.3Ghz receiver?
I don't have these numbers at hand, but it's not super. The L receiver is actually the same receiver as HF, i.e. an all band, all mode type synthesized receiver.
- Some where I reeded that AO-51 has an HF receiver? If it true, for
what is the purpose?
We initially wanted to try 28MHz/435MHz PSK31, but with the short antenna, and extra losses in a last minute hardware change, this mode does not work very well.
73, Drew KO4MA AMSAT-NA VP Operations
Hi, The sensitivity is -117 dBm for 10 to 12 dB SINAD. 73 OZ1MY Ib ----- Original Message ----- From: "Andrew Glasbrenner" glasbrenner@mindspring.com To: "Robin Theunis" robint91@gmail.com Cc: amsat-bb@amsat.org Sent: Thursday, June 10, 2010 12:43 AM Subject: [amsat-bb] Re: Technical question AO-51
Robin Theunis wrote:
- In V/S mode What is the average output power?
About 1.5 watts.
- What kind of antenna is used on 2.4GHz and 1.3Ghz?
A dual band antenna built by Stan Wood WA4NFY. http://n4hy.smugmug.com/AMSAT/AO-51-ECHO/Antennas/
- What is the sensitivity of the 1.3Ghz receiver?
I don't have these numbers at hand, but it's not super. The L receiver is actually the same receiver as HF, i.e. an all band, all mode type synthesized receiver.
- Some where I reeded that AO-51 has an HF receiver? If it true, for
what is the purpose?
We initially wanted to try 28MHz/435MHz PSK31, but with the short antenna, and extra losses in a last minute hardware change, this mode does not work very well.
73, Drew KO4MA AMSAT-NA VP Operations _______________________________________________ Sent via AMSAT-BB@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
participants (3)
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Andrew Glasbrenner -
OZ1MY -
Robin Theunis