Receiver - Topcon Hiper GGD Board Version: HE_GGD_2, HE_GGD_3 and HGGDT_7 e-mail: [email protected]

i tried but it requires a registration of the product, which i cant find in the database of the site (neither with serial number or manually selecting...

Can you please share the name of the firmware u had upload to your receivers, and tell us also how can we check the model of the boards ?