Radar Data Transmission
The plot combiner formats the data ready for transmission through the radar data network. The European standard radar data format Asterix , is normally adopted for (new) systems although the plot combiner may be required to provide additional formats for legacy systems. A dual channel feed is normally provided to the main radar data network. It is important that the peak loads on the link do not cause overloads. Under these conditions, the plot combiner may send a priority message warning of potential loss of data.
The plot combiner usually has a direct link to the on site engineering monitor display. For analysis purposes, this monitor can be provided with access to discarded data as well as operational output. Finally the plot combiner may be required to output status information to the control and monitoring system. This information can include such parameters as primary and secondary plot load, combination rate and rejected plot counts.