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From: tonya@hpldsla.sid.hp.com (Tony Arnerich)
Newsgroups: sci.electronics
Subject: Re: How to detect SLOOOOW AM?
Message-ID: <1990018@hpldsla.sid.hp.com>
Date: 17 Apr 91 19:15:09 GMT
References: <3632@naucse.cse.nau.edu>
Organization: HP Scientific Instruments Division - Palo Alto, CA
Lines: 15


 > We have GEOS weather satellite receiver.  The converter on the
 > dish comes out with an AM signal representing pixel values
 > from the images.  It is an a 2KHZ "carrier" (yup, that 
 > 2,000 Hz - audio).  There are about 500 pixels per line, so
 > I guess that the detected signal I want varies at that rate.

 > The question is, how does one detect such a low frequency
 > AM signal with the information of interest being such a 
 > large percantage of the carrier frequency?  

What's the percentage? You haven't told us what the pixel transmission
rate is. It *sounds* like you might think it's 500 pixels per second.

tonya@sid.hp.com