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Re: P3E transponder and launch



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
>
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