GRX3 GNSS Receiver

GNSS Firmware Upgrade Please Read:  

For updating the GRX3 receiver to 5.6, download the corresponding zip file.

Once downloaded, unzip the file and update the GNSS receiver using TRU/SRU using a two-step process. First, use the enclosed *tfi file found within the “Step 1 - B125 Linux bootloader firmware” folder.

Once finished, continue with the upgrade by using the enclosed *.tfi file within the “Step 2 - B125 GNSS firmware” folder.

NOTE: If you are updating UHF Radio Firmware, confirm which module your GRX3 contains (R2Lite or SATEL TR4+) and download the appropriate file below.

Please update to the latest version of SRU (Sokkia Receiver Utility) before updating firmware in your receiver.