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RACELOGIC Support Centre

Technical Specification - VBOX 3iS Single Antenna RTK (v1)

GNSS Specifications


Accuracy 0.1 km/h (averaged over 4 samples)
Update rate 100 Hz
Maximum velocity 655 kts (1200 km/h)
Minimum velocity 0.1 km/h
Resolution 0.01 kts (0.0185 km/h)
Latency 15.5 ms (fixed)


Absolute Positioning

Accuracy 3 m (95 % CEP*)
Accuracy with SBAS DGPS <1.8 m (95 % CEP*)
Accuracy with RTCM DGNSS Base Station 40 cm (95 % CEP*)
Accuracy with RTK Base Station 2 cm (95 % CEP*)
Update rate 100 Hz
Height accuracy 6 m (95% CEP*)
Height accuracy with DGNSS 2 m (95% CEP*)



Accuracy 0.05% (>50 cm per km)
Update rate 100 Hz
Resolution 0.078 mm



Accuracy 0.5 %
Maximum 20 g
Resolution 0.01 g
Update rate 100 Hz



Resolution 0.01°
Update rate 100 Hz



Resolution 0.01 s
Accuracy 30 ns


Brake Stop Accuracy (Trigger activated)

Accuracy ±1.8 cm**


* Circle of Error Probable (CEP): 95 % of the time the position readings will fall within a circle of the stated diameter

** Based on <50 m brake stop distance

IMU Specifications


Gyroscopes (Angular rate sensors)


Dynamic range ±450°/s ±20 g
Nonlinearity 0.01 % of full scale 0.1 % of full scale
Resolution 16 bit ADC (0.014°/s) 16 bit ADC (0.15 mg)
Bandwidth 50 Hz 50 Hz
Noise density 0.01°/s/√Hz 60 μg/√Hz
Bias stability 0.003°/s 15 μg
Bias repeatability (1 year) 0.2°/s 0.005 g


CAN Output

Output data rate 125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s selectable baud rate. Software controlled CAN termination.
Data available 
  • Outputs: Satellite count, time, position, speed, heading, body heading, height, vertical velocity, longitudinal acceleration, lateral acceleration, distance, IMU heading* , IMU roll angle* , IMU pitch angle* , X acceleration, Y acceleration, Z acceleration, pitch rate, roll rate, yaw rate, Robot heading *with IMU enabled.

    *with IMU enabled
  • Results: Trigger event time, trigger speed, start speed, end speed, deceleration test time, lap time, split time, radius of turn.


RS232 Output

Output data rate Up to 100 Hz


Digital Output

Signal levels Low = 0 V, High = 5 V, Max. frequency 4.4 kHz
Output type Speed, 1 PPS or Lap Beacon


GNSS Antenna Supply

Supply voltage 5 V DC


Input Power

Input voltage range 6.5 – 30 V DC
Power 7.5 W (maximum)


Digital Input

Input function Brake event trigger/ track marker

Environmental and physical

Weight 480 g (approximate)
Size 133.2 mm x 98 mm x 37.5 mm
Operating temperature -20°C to +70°C
Storage temperature -40°C to +85°C
IP rating IP67 
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