PSN-L Email List Message

Subject: Re: Satellite re-entry, Infrasound, Magnetometers
From: Jim Hannon jmhannon@........
Date: Fri, 04 Feb 2000 18:09:30 -0600

At 06:45 PM 2/4/00 -0500, you wrote:
>The sensors that Fat Quarters sells are MOST CERTAINLY fluxgates!
I admit I am guessing, but have you read the description of the Precision
Navagation sensors? They put out a variable frequency square wave just like
the Speake sensors. The fluxgate sensors I know about all require
demodulating a fixed frequency flux chopping signal and that results in a
DC voltage representive of the magnetic flux. This would have to be
converted to the variable frequency signal with additional circuitry.

Jim Hannon


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