I updated the firmware to Z21 on my Z-xtreme. How can I load the full options ( all the options) on the receiver now?
option b an u and J now are mising.

Upgrading to ZE21 should not have any bearing on what options our ZX has. Meaning, the upgrade should have maintained all the options you had prior to the upgrade prior, unless you had sent in your receiver for very special and specific f/w changes, which is not typical.

Option 'B' is for Diff Base, 'U' is for Diff Remote, and 'J' is for RZ Differential. These are all std options in RTK based Z-Xtreme units.



I hope this helps.