Data Pacing

This Brookhouse multiplexer feature is a tool for reducing NMEA data traffic if the data density is causing congestion and/or affecting the performance of a chart plotter, computer navigation software or instruments. Data pacing can be selected in the multiplexer setup menu.

If activated for an input port, data received via the port is ignored for short periods (1 or 2 secs) to alleviate the load on the system.

Data pacing should be used as a last resort. A better approach for reducing traffic is to filter out redundant NMEA sentences.

A fast heading sensor or electronic compass with a data frequency of 10 Hz (10 Heading sentences per second) can contribute to  congestion if combined with other NMEA data streams. High frequency heading data is often required for  MARPA and for radar chart overlay.  Therefore, applying data pacing to a heading data input port on the multiplexer may have a detrimental effect on those functions. Significant reduction of data can usually be achieved by filtering other input data streams.