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Designing/establishing viable comms. links

Derek Eccles
I work for a water company building new waster water treatment works (wwtw).

The company have both regional and site SCADA systems.

The regional SCADA system has approximately 20 scanner (base stations) with hundreds of sites (outstation) reporting essential signals back to central control.

OFCOM has set aside 80 channels in the 460 MHz region for regional scanning telemetry in the water industry.


The company also has comms. links for the site SCADA systems. These are only installed at large strategic works and therefore much fewer in number (40) and have dedicated mini microwave point to point links.

I am not sure of their frequency but suspect it could be a few Ghz.


My question relates to propagation of microwaves in this region of 460 MHz to a few GHz.

The wwtw I am working at present is at design stage and will have both the regional and site SCADA systems installed.

The company have seperate sections for designing the links and I have been told that although the regional telemetry system can be designed using a 460 MHz radio link

the site SCADA cannot be reached via radio and will require a leased line from a supplier e.g. Virgin.


The 2 systems use the same base station and therefore have the same path profile. I have been told the site SCADA cannot be reached via radio because it is a different frequency ?


  • 0 in reply to Derek Eccles

    Hmm. there is basic and basic...

    Well before buying a book at all can I ask how much of this website do you already know ? - it needs to be read with some care as the authors of some of the pages sometimes have a strange sense of humour and of course being US-centric they struggle with proper units of measurement, but a lot of the 'intro to XX' articles are very good.

    It also needs the search option to be set to filter by category, listing by alphabet is all but useless...

    Some basic antenna and propagation concepts are introduced at the RF cafe along with a ton of other stuff that is very hard to find. You will  need to chase through the on-site links the top level is superficial, but beneath that it is labyrinthine .

    Mike

  • 0 in reply to Derek Eccles

    Hi Derek, as Mike has pointed out below, there are lots of good resources online. One of the best traditional books that helped me massivley early in my career was ; "Microwave Engineering" by David M. Pozar. A great reference, easy to read and enough detail to gain you some credible knowledge. From there, you might identify any specialisms that interest you, or that you need to cover for work, and in those instances you can seek out more in-depth books or online references.

    I miss the old IEE Communications magazines - they were filled with useful articles in RF, Communications, Radar etc. and I learned a lot.

    If you want any specific advice, feel free to give me a shout. 

    Best regards,

    Gav

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