Trimble Outdoors 58052-00 Benutzerhandbuch

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Copernicus GPS Receiver     1 9
STARTER KIT     1
4.
Click the Device Manager button.
5.
Open the Ports (Com & LPT) section and note down the two USB Serial Port 
COM numbers. In the example above they are COM5 and COM6. In general 
Port A of the GPS device will be on the lower COM number and Port B will be 
on the higher.