Newsgroups: sci.electronics
Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!hobbes.physics.uiowa.edu!news.iastate.edu!IASTATE.EDU!rickmc
From: rickmc@IASTATE.EDU (Mcintosh Ricky Joe S)
Subject: RF Transmitter and Receivers
Message-ID: <1991Jun10.142559@IASTATE.EDU>
Sender: news@news.iastate.edu (USENET News System)
Reply-To: rickmc@IASTATE.EDU (Mcintosh Ricky Joe S)
Organization: Iowa State University
Date: Mon, 10 Jun 1991 19:25:59 GMT
Lines: 19

 
Keywords: 

Hello, I am building a device to broadcast digital information.  I need an RF
Transmitter and a receiver that uses a frequency and a signal strength with in
FCC regulations such that I don't have to apply for anything. I can use the
remote control frequencies because I am adding A LOT of error correction. I need
a distance of 50 yards. I do not need to broadcast through any objects. Infra
red or Ultrasonics will not work mainly because the transmitter will be moving
in an unpredicable manner. Other requirements are the signal will be 65K baud.
IE a max frequency of 32.5K (as a squarewave) so I need a large band width to
handle the first several harmonics. I would like something in the 0 - 500Khz. I
would like a reliable but simple circuit, that is as small as possible. I do not
need multiple channels one would be sufficient.  I would like to use a crystal
so calibration will not be necessary. The input will be a TTL signal from a
UART. If anybody has anything they would be willing to share I would appreicate
it. Thanks in advance. 

Rick.
