Re: Radio modems

[Nigel Orr <nigel.orr@xxxxxxx>]

At 12:04 15/02/99, you wrote:
>cables the entire distance is out of the question.  I can find plenty
>of apparantly suitable radio modems (RS232 interface) on the web
>but they all seem to be in the USA.

Have a look at:

http://www.rfsolutions.co.uk
http://www.radiometrix.co.uk
http://www.lprs.co.uk

They all do UK equipment, prices seem reasonable.  I think the addresses
are right, but my mental bookmark list could be corrupted ;-)

>Does anyone know which frequencies are legal in the UK so I can import
>a pair without fear of prosecution?  Can anyone recommend any
>particular manufacturers?

Traditionally, it's been 173 and 418 MHz, but there are lots of recently
reallocated ones- the above websites will have the sort of info you need.
As a rough idea, ISTR 2 ends of RS-232 modem with a 1km range costing
=A3100
to =A3300 each end.

Nigel
--
Nigel Orr                  Research Associate   O   ______=09
Underwater Acoustics Group,              o / o    \_/(
Dept of Electrical and Electronic Engineering     (_   <   _ (
University of Newcastle Upon Tyne             \______/ \(

------------------------------------------------------------------------
Fresh flowers are the perfect way to say "I love you".
Shipped direct from the grower, Proflowers.com has
arrangements from $29.95 plus S&H.
Click here: http://offers.egroups.com/click/216/0

eGroup home: http://www.eGroups.com/list/ukha_d
Free Web-based e-mail groups by eGroups.com