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Dual Antenna

Updated on Apr 14, 2026

You can access the menu by pressing the OK button. Use the Up and Down arrows to navigate through the menu and press the OK button to enter a submenu or change a setting. When you edit a setting, the Up and Down buttons will let you scroll through the available options for that setting and the OK button will confirm your selection. Use the Back button to exit a setting.

This is the menu you must use to set up your system if you want to use two antennas with your VBOX 3iS unit. You can read more about how to set up a Dual Antenna system here.

Illustration of a VBOX 3iS Dual Antenna RTK displaying the main menu with Dual Antenna highlighted.

This is the menu you must use to set up your system if you want to use two antennas with your VBOX 3iS unit. You can read more about how to set up a Dual Antenna system here.

Illustration of a VBOX 3iS Dual Antenna RTK displaying the main menu with Dual Antenna highlighted.


Illustration of a VBOX 3iS Dual Antenna RTK showing the Dual Antenna Mode screen with 'Enabled' displayed.
Illustration of a VBOX 3iS Dual Antenna RTK showing the Dual Antenna Mode screen with 'Enabled' displayed.


Allows you to enter distance between primary and secondary antennas.

Max 9.999 metres.

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Separation screen with '1.000 m' displayed.

Allows you to enter distance between primary and secondary antennas.

Max 9.999 metres.

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Separation screen with '1.000 m' displayed.


Allows you to intimate to the unit whether the antennas are configured in Roll configuration or Pitch configuration.

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Orientation screen with 'Roll Mode' displayed.

Allows you to intimate to the unit whether the antennas are configured in Roll configuration or Pitch configuration.

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Orientation screen with 'Roll Mode' displayed.


To measure the slip angle, try to get the alignment of the antennas as close as possible to the centreline of the vehicle. You can remove any residual errors in this alignment by using the Auto Align feature.

Select Auto-align to start the alignment process. 

Select Clear to remove an already set antenna alignment. 

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Alignment screen with '+00.00°' displayed.

To measure the slip angle, try to get the alignment of the antennas as close as possible to the centreline of the vehicle. You can remove any residual errors in this alignment by using the Auto Align feature.

Select Auto-align to start the alignment process. 

Select Clear to remove an already set antenna alignment. 

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Alignment screen with '+00.00°' displayed.


A procedure to account for vertical deviation between antennas to mitigate any knock-on effect on pitch/roll.

Select Auto-level to start the alignment process.

Select Clear to remove an already set antenna level. 

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Level screen with '+00.00°' displayed.

A procedure to account for vertical deviation between antennas to mitigate any knock-on effect on pitch/roll.

Select Auto-level to start the alignment process.

Select Clear to remove an already set antenna level. 

Illustration of a VBOX 3iS Dual Antenna RTK showing the Antenna Level screen with '+00.00°' displayed.


The Centre of Gravity offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the CoG Slip Offset screen.

The Centre of Gravity offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the CoG Slip Offset screen.


The Front Left offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the FL Slip Offset screen.

The Front Left offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the FL Slip Offset screen.


The Front Right offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the FR Slip Offset screen.

The Front Right offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the FR Slip Offset screen.


The Rear Left offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the RL Slip Offset screen.

The Rear Left offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the RL Slip Offset screen.


The Rear Right offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the RR Slip Offset screen.

The Rear Right offset must be measured from the primary antenna and entered in metres with 2 decimal places.

Illustration of a VBOX 3iS Dual Antenna RTK showing the RR Slip Offset screen.