http://www.signalengineering.com/ult...na_basics.html
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On the internet, no one can hear you modulate.



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Outgoing mail is certified Virus Free. I like that.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.754 / Virus Database: 504 - Release Date: 9/6/2004