Newsgroups: sci.electronics
Path: cantaloupe.srv.cs.cmu.edu!rochester!udel!gatech!purdue!yuma!galen
From: galen@picea.CFNR.ColoState.EDU (Galen Watts)
Subject: Re: RF Communications Link
Sender: news@yuma.ACNS.ColoState.EDU (News Account)
Message-ID: <Apr26.140931.88879@yuma.ACNS.ColoState.EDU>
Date: Mon, 26 Apr 1993 14:09:31 GMT
References: <blumenow.7@underdog.ee.wits.ac.za>
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Organization: College of Natural Resources, Colo. State Univ.
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In article <blumenow.7@underdog.ee.wits.ac.za> blumenow@underdog.ee.wits.ac.za (Warren Blumenow) writes:
>We have to design an RF link for a distance of 250 m.  We're using
>standard RS232 waves (square pulses) as the modulating waves and the 
>carrier wave is sinusoidal.  The link has to be bidirectional.
>We would appreciate any advice on the type of modulating techniques
>or antennas that we should use.

What frequency is your carrier?

Have you considered using two tones, one for 1 and another for 0?

How high is your RS-232 data rate?

Can you use more than one carrier freq?

Have you considered hiring an RF data transmission consultant?

Just Curious,
Galen Watts, KF0YJ

