This form appears when you press CHANGE in the parent Transmission of Nmea 0183 Sentences form. The list box on the left will show the present available COM ports. If you are not sure which one refers to the multiplexer just unplug the USB cable from the PC and press REFRESH. The COM port that disappears from the list is the one that refers to the multiplexer. Plug it again.

The baud rate that you should set in this form is the baud rate of P5. Remember that data that is output on the RS-422 P5 serial port (connector A5-B5-GND on the PCB) is simultaneously output on the USB connector of the module. Be careful when plugging and unplugging the USB cable from the module as to avoid damaging the connector.

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