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Re: LF: Probably not a new question...

To: [email protected]
Subject: Re: LF: Probably not a new question...
From: Alberto di Bene <[email protected]>
Date: Tue, 27 Apr 2010 15:13:19 +0200
In-reply-to: <2B460BBAF166453C9B99F67A38457609@PCCasa>
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On 4/27/2010 2:25 AM, Daniele Tincani wrote:
Hi Alberto,
 
I'm quite familiar with digital signal processing (I work in the embedded SW area for a big manufacturer of telecommunications equipments and digital streams of several Gbit/s are common on our boards), nevertheless I know that analog conditioning of signals (before they become "numbers") is at least as important as the digital treatment, unless you accept to sample meaningless information (noise) at the ADC :-) Anyway I'm sure this is dealt with perfectly in SDR's so I think we can stop here this discussion.
Thank you for clarifications.
Cheers
D,
Hi Daniele,

   I wasn't specifically addressing you in my past message, I was just trying to explain what is behind some diffidence that often it is possible to hear or to read
about the SDR technology.  And the Softrocks are a mixed blessing... from one side they helped a lot with their very low cost the diffusion of the SDR concepts
among the ham community. But on the opposite side, their lackluster performance generated in some the impression that SDR is a technology still much behind
its classical analog counterpart, which isn't....

You are perfectly right when saying that the analog portion in front of the digitizer is of utmost importance, to not have to deal with meaningless numbers.
That's why the tendency is to bring the digitization stage as close as possible to the antenna... and, at least for the HF bands, this goal is almost reached with
the QuickSilver and the Perseus SDR....

73  Alberto  I2PHD

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