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From: "Robbie Banks"
Subject: Re: Radio Modules for AMR
Date: Thu, 19 Sep 2002 09:24:54 +0100
References: <3Z4i9.764$XE1.firstname.lastname@example.org> <email@example.com>
NNTP-Posting-Date: 19 Sep 2002 08:24:51 GMT
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Another alternative is
They stock a range of radio modules and transceivers and I've always found
them very informative when I have any questions.
"Frank Raffaeli" wrote in message
> "Tony" wrote in message
> > Hello
> > I am putting together a system to read water meters that are scattered
> > among ~35 buildings. I am considering both direct transmission to a
> > location (shop) or designing each data collection device to act as a
> > repeater. The second option would allow the devices to be used elsewhere
> > places where the buildings were farther apart. And so I lean toward that
> > way. But naturally that is a lot more complex. And involves Transceivers
> > instead of transmitters.
> > Tony
> I agree with Bill Lewis's post that in general, other things being
> equal, there is a tradeoff between bandwidth and range. You may have
> difficulty finding reasonably priced products used in un-licensed
> bands that have the range and reliability you require. for a
> ready-made solution, check out:
> Their solution consists of a narrow band fsk receiver at the
> collection terminal with an input sensitivity close to -120 dBm and a
> ~750 milliwatt 476 MHz transmitter at the meter side. I believe this
> is a licensed band. That setup will give you at least the range you
> are looking for.
> Frank Raffaeli
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