PSN-L Email List Message

Subject: Voltage controled attenuator/amp
From: David russel ogzax@........
Date: Fri, 4 May 2001 17:12:51 -0700

Al's inquirey about the VCA got me think'in again about of a method
of getting data from the s'smtr into the computer. 

        I was wondering if it was possible to Amplitude Modulate, with
the seismometer signal, a carrier of an arbitrary  audio frequency of
about 10Khz and input it into the SoundBlaster at the back of your
computer. Then doing something fancy with software like peak averaging
then plotting it.

Anyone ever done somth'in like this?

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Larry Cochrane <cochrane@..............>