Instruction for xdi-192n please follow the below step in main unit at Ceiling Console

1. 
   Press the NO.4 button. Enter into the QUICK.
   

2. 
   In the QUICK interface, select USER MENU , and then press OK. Enter into USER.
   

3. 
   In the USER interface, press NO.2&NO.3 at same time and keep 5 sec. Enter into INSTALL.
   

4. 
   In the INSTALL interface , select NMEA setup, and press OK, enter into next page.
   

5. 
   In the INSTALL/…/NMEA input setup interface, select Auto scan and input selection, and press OK.
   

6. 
   In this page , you can check the NMEA sources, and select Accept selection and save, and press OK.
   

The next step just press to back to the wind indicator interface.