LEA-6 / NEO-6 / MAX-6 - Hardware Integration Manual
UBX-14054794
Production Information
Design-in
Page 31 of 85
2.2.3.6
Odometer / Speedpulses
DR receivers use signals from sensors in the car to establish the velocity and distance traveled. These sensors are
referred to as the odometer and the signals can be designated odometer pulses, speedpulses, speed ticks, wheel
pulses or wheel ticks. These terms are often used interchangeably which can sometimes lead to confusion. For
the sake of consistency, in this document we will be referring to these signals as speedpulses.
Pin
Signal name Direction
Usage
27
SPEED
Input
Odometer Speedpulses
Table 13: LEA-6R Odometer / Speedpulses
The speedpulse signal required for DR modules must have a frequency range from 1 Hz to 2 kHz (0 Hz is equal
to a speed of 0 km/hour) and must be linear to the driven speed.
For DR calibration see section D.
