[amsat-bb] Re: P3E transponder and launch

[John Champa]

Guys,

The reports I have seen is that the SDX sounded BETTER than the
traditional analog transponder.  Bob, N4HY, can confirm that fact?

Also, if the fault is a hardware fault, we are dead in the water.
However, if the fault is a software fault, we can upload new
software to fix the problem, AND even work around a possible
hardware failure.

Anything other than SDX would be a step-backward for AMSAT.

73,
John
K8OCL

----Original Message Follows----
From: "John B. Stephensen" <kd6ozh at comcast.net>
To: <Patrick.McGrane at aceweb.com>, <amsat-bb at amsat.org>
Subject: [amsat-bb] Re: P3E transponder and launch
Date: Fri, 23 Mar 2007 22:29:47 -0000

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 at aceweb.com>
To: <amsat-bb at 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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