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From: mitel!Software!meier@uunet.uu.net (Rolf Meier)
Newsgroups: comp.dcom.telecom
Subject: Re: Apple Wants Radio Waves For Data Transmission
Message-ID: <telecom11.140.2@eecs.nwu.edu>
Date: 20 Feb 91 17:22:49 GMT
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X-Telecom-Digest: Volume 11, Issue 140, Message 2 of 8
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In article <telecom11.119.8@eecs.nwu.edu> Alan Ruffer <alan@
adept.uucp> writes:

> The REALLY sad part about all this is that 902.0 - 928.0 Mhz is the
> amateur radio 33 centimeter band.  Devices that operate in this band
> are NOT guaranteed freedom from interference!  There are other
> wireless gadgets that operate in this frequency range too.  Buyers of
> these devices should be aware of this.  While it is illegal for an
> amateur to intentionally interfere, these devices are subject to
> unintentional interference, and amateurs may ALSO be subject to
> interference from these transmiters.

In theory, narrowband transmissions in the 902-928 band should not
cause interference to spread spectrum transmissions in that band, and
vice versa.  That is the whole purpose of allowing spread spectrum to
operate in that band.

Now, any band is subject to interference from transmissions which
operate illegally within that band, but that is a matter of
enforcement, not regulation.

There are a number of spread spectrum systems operating successfully
in the ISM (industrial, scientific, medical) bands, such as 902-928.
According to my chart of spectrum allocations, this is a "secondary"
amateur band, whatever that means.  I don't believe it is encouraged
for amateur usage.


Rolf Meier     	Mitel Corporation