Electrical Engineering - Radio Modem ?

Author

Radio Modem ?

zarlino

2007-03-08, 9:25 am

Hello

Could yu reccomend me for drinking water scada a radio modem pls? what
do you recommend me half-duplex or full-duplex ?

Do you know the best one ?

thank you

Jake Brodsky

2007-03-11, 9:25 am

zarlino wrote:
> Hello
>
>
> Could yu reccomend me for drinking water scada a radio modem pls? what
> do you recommend me half-duplex or full-duplex ?
>
> Do you know the best one ?
>
> thank you
>
>

You might as well ask about what kind of car is "best." There are
features a particular radio is good for. There are also costs. You
haven't even mentioned on what bands this radio is supposed to operate,
whether this is to be licensed or unlicensed operation, what power
systems are available, how much space is required, and what the
operating environment is supposed to be like.

More than that, however, you should be concerned with antenna sites, and
path profiles.

I don't have an answer for you. In fact, anyone who does has no clue
what you're really asking for. I recommend you consult with an engineer
who has experience in this area. There are no simple answers here.

Jake Brodsky

Mike Lamond

2007-03-11, 1:25 pm

"zarlino" <ferhat.demiralp@gmail.com> wrote in message
news:1173353679.211695.3410@v33g2000cwv.googlegroups.com...
> Hello
>
>
> Could yu reccomend me for drinking water scada a radio modem pls? what
> do you recommend me half-duplex or full-duplex ?
>
> Do you know the best one ?
>
> thank you
>
>
I know what I've used. Where I used to work we did many water and
wastewater projects with radio telemetry. If we had favorable conditions,
we used Microwave Data Systems radio modems for the unlicensed
928MHz spread-spectrum band. When more power was required, we
used EF Johnson VHF or UHF radio modems, for which the owner had
to have the frequencies licensed.

This is in the U.S. Your local rules, available products and mileage will
vary.

Mike

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