Very similar SDR technology has been used in amateur HF transceivers for years with no complaints. SDR can be used to compensate for losses in the analog circuitry.
73,
John KD6OZH
----- Original Message ----- From: "Patrick McGrane" N2OEQ@aceweb.com To: amsat-bb@amsat.org Sent: Friday, March 23, 2007 12:28 UTC Subject: [amsat-bb] P3E transponder and launch
Greetings from pat n2oeq
I have been looking forward to the launch of P3E which I thought was going to be this year. I am concerned about the germans use of the SDR technology over william Liejanier's transponder design. I am of the belief that signal processing presents a loss in the path, please correct me if I'm wrong. Williams Hamsat transponder is excellant and made me very interested in P3E. Besides making the voice unnatural, are other modes allowed through the SDR transponder? Does the Helaps system compensate for the loss? I'm of the Keep it simple discipline as once its up there nothing can be done to fix it.
If amsat-dl is monitoring , please update your website and provide a direct Paypal donation utility.
Thanks to amsat-na for the donation to P3E recently. 73, pat
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