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RACELOGIC Support Centre

Quick Start Guide - VBOX 3i Dual Antenna (v5) with Firmware Version 3.0

This page covers handy information for when you initially receive your VBOX 3i Dual Antenna (v5) unit and what you need to know before using it.

Please register your VBOX unit so that Racelogic can continue to provide you with notifications about the latest software releases and firmware upgrades for your Racelogic product, and offer technical support.

Register your device here.

What is in the box?
When you purchase a VBOX 3i Dual Antenna, you will find the following items when you open the box:
Product Code Quantity Description
VB3iSL-V5/VB3iD-V5/VB3iD-V5a 1 VBOX 3i Dual Antenna unit 
RLVBACS020 1 Mains Power Supply
RLACS156 2 GPS/Glonass antenna - Primary Antenna
RLCAB071-4 2 Antenna cable (4 m)
RLACS098 1 4 GB Compact Flash Card
RLCAB001 1 VBOX Serial PC cable (5-way LEMO to 9-way D-type serial cable – 2 m)
RLACS119 1 VBOX 3i Bluetooth Antenna
RLACS120 1 VBOX 3i Audio Headset
ADC25IPCON 1 25-way D-type connector  
RLCAB066-2 1 USB ‘A’ to Mini ‘B’ 2-m cable (USB Configuration)
RLCAB010LE 1 2-way LEMO power lead to 12V cigar lighter – 2m
RLACS163 1 USB multi card reader
VBFMAN 1 VBOX File Manager unit
RLCAB005-C 1 VBOX to VBOX Module power cable (5-Way LEMO to 5-Way LEMO) – 2m
ANTLOCSTKRL1 2 Antenna Location Sticker
RLVBACS013 1 VBOX Padded carry case with foam spacer
RLACS091 1 VBOX Tape Measure
RLCALUKAS 1 Certificate of Calibration – UKAS Accredited
Power Supply  


You can connect your VBOX 3i to other Racelogic input modules, including the ADC03, ADC02, TC8, FIM02/3 and multifunction displays. The voltage supply to Racelogic modules connected to the VBOX unit will be at the same level as the VBOX unit's power input. Therefore, when you are using any of the Racelogic peripherals with VBOX 3i units, the input voltage must not exceed 15 V. If you input a higher voltage, you can damage the module and possibly the VBOX unit.

The primary source of power to VBOX 3i units is the Power Supply - LEMO 2-way Plug. This is terminated in a 2-way connector and mates with the 2-way PWR socket on the VBOX unit.

VBOX 3i units can, however, be powered from a wide range of voltage sources. If you are considering batteries as a power source, note that the minimum operating voltage of a VBOX 3i unit is 7 V and that the maximum operating voltage input must not exceed 30 V DC. If you use voltages that are outside these ranges, you can damage the VBOX unit.

If you are running the VBOX 3i unit from a battery pack, the unit will sound a warning tone to indicate when the battery voltage is reaching the minimum operating voltage level. You must recharge or replace the battery pack when you hear this tone.

The VBOX 3i units have been designed to generate as little heat as possible and have a wide operating temperature range. However, it is good practice to mount your VBOX unit in a position where it has sufficient airflow around the case.

Note: You must connect the GNSS antenna to the VBOX unit before you connect the power. The VBOX unit will look for a connected GNSS antenna on power-up and will automatically adjust its gain for optimum performance.

External RACELOGIC modules operate from a 12 V vehicle supply. Therefore, the VBOX supply must not exceed 15 V DC when you are using external modules.

 Compact Flash Memory Cards (CF Cards)

The VBOX units will store logged data onto CF cards. The CF cards that are available from Racelogic are already optimised for use with the VBOX units, and as such, they do not need to be formatted before use.

Should the CF card need formatting due to card errors, and the card is smaller than 32 GB, you can do this through Windows. If the card is larger than 32 GB, you must use third-party applications to reformat them. You can find more information about how to format a large Flash card in FAT32 here.

Note: You can purchase CF cards directly from Racelogic and our distributors, or you can contact us to confirm card compatibility.

Do not remove the CF card or power down the VBOX unit while the unit is logging (CF LED is flashing). This can lead to data loss or corruption. Press the LOG button to stop the logging first. 

VBOX 3i units have a USB 2.0 connector that you can use to configure your VBOX unit and output real-time serial data at the full 100 Hz data rate.

Before you connect your VBOX unit to your computer, you must make sure that you have downloaded and installed the VBOX Setup software. This will install the required USB drivers on your computer.

The software installation will place the VBOX USB drivers in the following location on your computer. C:\Program Files\Racelogic\Drivers. 

When you connect a powered-up VBOX 3i to your computer with the supplied USB lead, your PC will recognise the presence of new hardware and open the typical Windows install window for new hardware. Follow the on-screen prompts and point the Windows installation to the location of your drivers.

You can also download USB drivers for VBOX 3i from the Drivers and Utilities section on




VBOX 3i Dual Antenna - front view.png


You can find more information about the different inputs and outputs here.

BLUETOOTH VBOX 3i units come equipped with a Bluetooth radio allowing configuration of the VBOX unit remotely along with the remote output of real-time VBOX serial data, at the full 100 Hz data rate, to any Bluetooth capable PC or data logger. 

This is the analogue input connector. Each of the four analogue input channels on a VBOX 3i unit has a dedicated analogue converter. Data is recorded from each channel simultaneously. The analogue input connector also provides two power outputs that may be used for driving sensors. 

PWR This is the power connector. VBOX 3i units can accept a supply voltage between 7 and 30 V DC. 
AD1 The AD1 port has 1 analogue voltage and 1 digital output. The digital output is a simple on/off state output that can be associated with any of the data channels being logged by the VBOX. You can set a threshold level for the selected data channel, where a true condition gives a 5 V output and a false condition gives a 0 V output. You can also associate hysteresis and tolerance values with this condition. The default function of this digital output is to indicate the current logging status of the VBOX.

The AD2 port has 1 analogue voltage and 1 digital output. The digital output is a frequency/pulse output that corresponds to velocity. You can adjust the pulse per metre range in the software. The voltage range of the analogue output is 0 to 5 V DC.


The ‘D IN’ connector contains the two digital inputs for the VBOX 3i RTK.

  • The event marker/brake trigger input is connected to an event capture input on the GNSS engine. This captures precisely the trigger event time (10 ns resolution). A handheld event marker is also available so that you can record marker events in the data file.
  • A remote logging on/off switch is also available for ease of use and in situations when the front panel switch is not easily accessible.
CAN* The secondary RS232 port is used for connection to a Telemetry Radio module allowing the reception of Differential GPS (DGPS) data for local correction from a Racelogic Local DGPS base station, or Moving Base solution. The secondary RS232 port is located in the connector marked CAN on the VBOX 3i front panel.

The primary RS232 port is used for all communication between the VBOX 3i unit and a laptop PC. The primary port is marked SER on the front panel.  

Note: Due to the max bandwidth being 115200, live data transfer of all channels is limited to 20 Hz. 50 Hz should only be used to transmit standard GPS channels and Solution Type, and 100 Hz can only transmit Sats, Time, Speed, and Trigger Event Time. Logging too many channels at too high a rate will cause drop-outs and loss of data. For maximum accuracy, you should log tests performed at a GPS sample rate above 20 Hz to compact flash and do a post-process analysis. 

AUDIO VBOX 3i units can record audio tags synched with a set GNSS timestamp, with an accuracy of 0.5 seconds.

VBOX 3i units include a USB 2.0 connection that you can use to configure your VBOX unit and output real-time serial data at the full 100 Hz data rate.

ANTENNA A The primary antenna connector.
ANTENNA B The secondary antenna connector.

*You can configure the function of the CAN and SER ports with VBOX Setup and swap the Racelogic Bus profile. The Racelogic CAN bus is used for connected Racelogic modules or displays. The Vehicle CAN bus (VCI) is for use by third-party CAN equipment, whether you are logging to or from the VBOX. For dual use of RS232 and CAN from one of the sockets you will need to use a 5-way Lemo splitter (RLVBACS024).


Power supplied to external Racelogic CAN modules through the CAN or SER cables is at the same voltage as the input power supply. When you are using Racelogic external CAN modules (eg; MFD or ADC03), you must make sure that the VBOX 3i supply voltage does not exceed 15 V DC.


CF  Indicates that the unit is writing to the Compact Flash card.
LOG  Indicates that the unit is capturing data to the CF card and the current logging rate.
SATS   Indicates the number of satellites being tracked.
DUAL  Indicates whether dual antenna mode is enabled/disabled and that the antenna lock is fixed.
DIFF  Indicates the DGPS status.
IMU  Indicates the IMU integration and initialisation status.
BLUETOOTH  Indicates that communication has been initialised and that Bluetooth connection has been confirmed.
PWR  Indicates whether the unit is powered and ready to use or not.
D IN  Indicates activated/triggered event marker input.
CAN  Indicates that expected incoming CAN data has been decoded properly and is being logged.
SER  Indicates  incoming serial traffic and that incoming CAN data has been decoded and is being logged.
You can find the full description of the different behaviours of the LEDs here.
Compact Flash 
This is the CF Card slot on the front panel of the VBOX 3i unit. It accepts Type I compact flash cards to log data. 
VBOX 3i units has two membrane buttons on the front panel, LOG and FUNC. LOG is used to start and stop logging to the compact flash card, and FUNC is used to switch between two sample rates, 100 Hz and 20 Hz.

The LOG button will override any of the automatic logging thresholds set in the VBOX unit. For example, if you have set the VBOX unit to log all the time, the LOG button will toggle logging on and off. If you have set the VBOX unit to ’log only when moving’ and you are moving, pressing the LOG button will stop the VBOX unit logging and close the file on the compact flash card. Logging will now not continue, even if you are moving, until you press the LOG button again or you remove the compact flash card and reinsert it. The VBOX unit will then continue to log only when moving. 


  • If the VBOX unit is using ‘log only when moving’ log mode, and the vehicle has been stationary from power-up, the LOG button will not initiate logging. If you want the VBOX unit to log in this situation, you have to use VBOX Manager or VBOX Setup to change the log mode to ‘Log Continuous’.
  • Every time the logging is toggled with the LOG button, a new file is created.
  • When the VBOX unit is logging, the green LOG LED will be solid and the blue CF light will flash.


Press and hold the LOG button for 5 seconds to initiate a coldstart

Do not remove the CF card or power down the unit while the CF LED is flashing. If you need to remove the card or power down the unit and the CF LED is flashing, you must press the LOG button first to manually stop the VBOX unit from logging. If you don't do this you can lose the data or corrupt the card.

Pressing the FUNC button briefly flashes the LOG LED and beeps to indicate the current sample rate. A slow flash (once per second) indicates 20 Hz, and rapid flash (5 times a second) indicates a 100 Hz sample rate. Pressing and holding the FUNC button for 5 seconds toggles the log rate between 20 Hz and 100 Hz. The sample rate can also be set using VBOX Manager or VBOX Setup.

Default Setup
You can restore the default factory settings on VBOX 3i unit by pressing and holding the FUNC and LOG buttons simultaneously for 10 seconds. This will trigger the reset process. There will be an audible notification beep and tune playing when the process has completed.



VBOX 3i Dual Antenna
  1. Connect one end of an antenna cable to the connector on the antenna(s).
  2. Place the antenna(s) on the roof of the vehicle.

You can read more about how and where to place the GNSS antennas here.

  1. Connect the antenna(s) to the antenna port(s) on the VBOX 3i unit. 

Note: The primary antenna is Antenna A and the secondary antenna is Antenna B. You can find more information about best practices for antenna placement here.

  1. Connect the power cable to the PWR port on the VBOX 3i unit.
  2. Connect the Tablet/Laptop to the USB port on the VBOX 3i unit with the USB cable (RLCAB066-2).
  3. Secure the VBOX unit in the vehicle.
    You can, for example, place it in the foam insert in the carry case and secure the carry case in the back seat of the vehicle with the seat belt. 
VBOX 3i RTK Configuration setup (Antennas, PC and Power)_1000px.png
An overview of the VBOX Setup software with VBOX 3i Dual Antenna (v5) units with firmware version 3.0 connected. From this page, you can find links to more information about the individual menus available in the Setup software.



You can use the VBOX Setup Software to configure VBOX 3i units. You can download the VBOX Setup software here.

Alternatively, you can also configure some settings with the VBOX Manager


The connection between the VBOX unit and the computer should be made via USB or Bluetooth for optimum performance.

When the VBOX unit is physically connected and powered, open the VBOX Setup software and use the drop-down list to select the COM port that the VBOX unit is connected to. Click Connect and VBOX Setup will open the setup screen for your VBOX unit. 


Note: You may see an auto-detect message if you have changed the baud rate from the default value. Click Yes to allow the different baud rates to be scanned.

General-default_Dual antenna.png

Software Overview
Available menus The menu buttons in the sidebar allows you to select between the different settings menus. Click the buttons to change the menu. VBOXSetup_GeneralMenu_button_framed.png
Menu title Displays the title of the currently selected menu. General_current_menu.png
Help Depending on which menu you have open, the question mark icon will open up the corresponding User Guide page within the Racelogic Support Centre. General_Help.png
Language Change the operating language. General_Language.png
Settings area The white area in the application window contains all the settings. These will vary depending on the selected menu. General-default_Settings Area_cropped.png
Write to unit After making changes to the setup, you must press the Write to unit button to make sure that the settings are uploaded to the connected VBOX unit. General_Write to unit.png
Close Closes the software, if changes have not been saved to the unit, you will be prompted to save the settings. General_Close.png

General Menu

General-default_Dual antenna.png

Channel Config Menu

Channel Config _ dual antenna.png

Logging Menu

Logging - default.png

GPS Menu

GPS - default.png

Dual Antenna Menu

Dual Antenna - default.png

IMU Menu

IMU-default_dual antenna.png


ADAS - default - dual antenna.png

CAN Menu

CAN - Settings.png

Advanced Menu

Advanced - Output.png

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