PSN-L Email List Message

Subject: Re: Getting started...
From: ChrisAtUpw@.......
Date: Mon, 5 Mar 2007 11:23:40 EST


In a message dated 2007/03/05, system98765@............. writes:

>  I have one of those DataQ devices with the serial connector,
> a small geophone (used by military)

Hi Kareem,

       Which Dataq ADC? Some are worse than others. 12 bit is absolute 
minimum for seismometers. 

       Do check, but military geophones were mostly higher frequency, 10 Hz+. 
You want a 4.5 Hz or less.

       How about constructing a Lehman?

       Regards,

       Chris Chapman

          
In a me=
ssage dated 2007/03/05, system98765@............. writes:

I have one of those DataQ devi= ces with the serial connector,
a small geophone (used by military)


Hi Kareem,

       Which Dataq ADC? Some are worse than ot= hers. 12 bit is absolute minimum for seismometers.

       Do check, but military geophones were m= ostly higher frequency, 10 Hz+. You want a 4.5 Hz or less.

       How about constructing a Lehman?

       Regards,

       Chris Chapman

      
=20

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