- Select the .
- Select Choose File for Ram file and navigate to the GR-i3 firmware file (.ldr extension).
- Select Choose File for Flash file and navigate to the GR-i3 firmware file (.ldp extension).
- Select the Upgrade.ADDITIONAL INFORMATION:

- Select from the menu on the left side of the screen and repeat steps 2 through 4 for the Auxiliary GNSS receiver.
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Load GR-i3 firmware
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