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The Radio Module (RDM) is designed to communicate with the Smart Antenna Modules (SAMs).

The SI Central software controls the Radio module to receive QC data from the SAMs in the spread.  Due to the built-in standard USB interface, it can be used in the central recording system by connecting it to the Operator Console computer via the Advanced Time Stamp module, or users are able to use it in a vehicle moving within the limits of the spread by connecting it directly to a laptop computer.

For better radio reception in the Central Recording System connect an elevated high-gain antenna to the RDM. In case of the vehicle application connect a mobile high-gain antenna.