# GPS Port Settings Tab
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### **GPS** - Displays the COM port that is used to communicate with the GPS. Ensure you have selected the correct port with the drop down menu.
**Baud (Rate)** - The communication speed between the software and GPS (it should match the baud rate of the GPS).
**Scan for GPS** - Checks the available COM ports and usual baud rates for valid GPS data.
**Warning/Error Configuration** - Settings changed on this page will stay even after the system is turned off.
**Current** - Displays the most recent GPS information received in a table.
**Raw GPS data** - Displays the most recent GPS data received. Primarily used for diagnostics, should support be required.
**Output Data** - Displays the most recent outgoing communications. Primarily used for diagnostics, should support be required.
**Recent GPS errors** - A list of the most recent GPS errors, for review in case they are intermittent.
**Open Device Manager** - Used to investigate COM port issues if required.
**Connect and Disconnect** - Manually start or stop communication with the app controller.
**NOTE**: T3RRA software and iGrade™ must have identical Com port and Baud Rate settings in order to communicate.