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 ?
