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RACELOGIC Support Centre

3.1 GNSS Menu

This page contains information about the GNSS menu under the Front Panel settings on the VBOX 100Hz Speed Sensor (v5) unit.


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. 

You can use this menu to configure the GNSS settings.

VBSS100-V5 - Main menu - GNSS.png
GNSS Coldstart 

This setting will perform a coldstart of the GNSS Engine.

You can find more information here.

Dynamic Mode

This setting lets you change the sensitivity of the GNSS engine.

You can find more information here


High (default)

For high-dynamic applications such as brake stop testing.


Suitable for all other testing.


For less dynamic applications, such as steady-state speed measurement or coast-down testing.


Sets the DGNSS mode.

Available modes are: 

  • None (default) - Differential GNSS is off.
  • CMR (2cm RTK) - 2 cm correction (Trimble standard message type).
  • RTCMv3 (2cm RTK) - 2 cm correction (RTCM standard message type). This is the recommended setting.
  • NTRIP - Internet-based subscription service, more information on this can be found here.
  • MB-Base - Mode for use in Moving Base ADAS applications.
  • MB-Rover - Mode for use in Moving Base ADAS applications.
  • RTCM (40 cm) - The VBOX unit receives RTCM corrections via a Racelogic telemetry module and a locally placed Base Station. Contact Racelogic or your local agent for more details.
  • SBAS - SBAS differential corrections are received from the nearest Geo-stationary GPS-SBAS satellite.
VBSS100-V5_GNSS_DGNSS Mode_None_Selected.png

This setting configures the DGNSS baud rate. 

To make sure that VBOX unit receives the DGNSS correction signal, you must set the correct DGNSS rate.

All Racelogic blue boxed radios use 115200 kbit/s, and Satel grey boxed radios use either 19200 kbit/s or 38400 kbit/s.

VBSS100-V5_GNSS_DGNSS Rate_115200_Selected.png

Elevation mask

This setting lets you change the elevation mask, which is selectable from 10 to 25°. 

If the testing area has nearby trees or buildings, you may benefit from increasing this value to reduce the effect of multipath.

You can find more information here.

10 (default)15, 20, 25

Note: Increasing this value will reduce the number of satellites the VBOX will be able to use.

VBSS100-V5_GNSS_Elevation Mask_10_Selected (Framed).png

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