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From: jeff@markets.amix.com (Jeff Crilly N6ZFX)
Newsgroups: sci.electronics
Subject: Re: Wireless Modem
Keywords: wireless modem fm radio data
Message-ID: <1991Mar29.070109.11684@markets.amix.com>
Date: 29 Mar 91 07:01:09 GMT
References: <413@mixcom.COM>
Distribution: usa
Organization: American Information Exchange Corporation, Palo Alto, CA
Lines: 19

In article <413@mixcom.COM> jjwwjj@mixcom.COM (Robotic Systems) writes:
>I don't know if my last message got out properly, so I am asking again:
>
>Does anyone have suggestions for a cheap, easy to build (ie. 10 chips or less)
>wireless modem? I need atleast 300 bps and a 50 meter range.
>
Cheap approach: find a low cost used 300 baud accoustic coupler or maybe
a commodore modem (though the latter is a parallel bus).  Hook this guy
to the FM stereo transmitter described in other articles.  Also hook up
a FM receiver to it.  Do the same at the other location.  Use one channel
of the stereo FM transmitter/receiver for each direction; or just use
a seperate frequency for each direction.  Make sure you also use protocol
on the data.  No doubt its not going to be error free.

Let us know if it works.

Jeff Crilly (N6ZFX)
AMIX Corporation  2345 Yale Street  Palo Alto, CA  94306
jeff@markets.amix.com, {uunet,sun}!markets!jeff, N6ZFX@N6IIU.#NOCAL.CA.USA