Subject:  The relative safety of CDMA cell-phones.....
Date:     Sat, 4 Jul 1998 092933 -0500 (CDT)
From:     "Roy L. Beavers" <rbeavers@llion.org>
To:       emfguru@hotmail.com
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---------- Forwarded message ----------
Date: Sat, 04 Jul 1998 10:58:23 +1000
From: Stewart Fist 
To: "Roy L. Beavers" 
Subject: The relative safety of CDMA cell-phones.....

I think that Wolfgang is missing the point with CDMA.  I agree with Alisdair
that CDMA because it doesn't have a power-pulse, and because it operates at or
below the normal noise threshold of the environment, is far less likely to
produce problems than TDMA systems like GSM and the Digital form of AMPS.

CDMA in terms of its RF effects is virtually the same as the old AMPS analog
phone systems and TACS in Europe.  TDMA introduced another metric, which was
to switch the power on and off, rapidly — and as everyone who deals with
electronic systems knows, this creates a lot of unknowns, like transients and
harmonics and low-frequency induced power.

CDMA doesn't have any of these, and it requires less transmission power also. 
So it is not really a question of us needing to wait for years of experience
before we can judge, in some areas of technology it is quite valid to predict
that one condition will be prefered to another.  

-- 
Stewart Fist - writer and columnist
See http://www.theaustralian.com.au/techno/columns/fist.htm 
       http://www.abc.net.au/http/sfist/         (some archives)
       http://www.electric-words.com              (main archives)
70 Middle Harbour Road, Lindfield, 2070,   N.S.W,   Australia
Phone +61 2 9416 7458                        Fax  +61 2 9416 4582



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Reprinted with permission of Roy Beavers, http://www.feb.se/EMF-L/EMF-L.html