EVK-F9DR - User guide
UBX-23007618 - R01 Getting started Page 9 of 33
C1-Public
3 Getting started
This chapter works as a simple step-by-step guide for setting up the device and using it for evaluation
in an automotive application using u-blox sensor fusion technology. The simplest setup uses
Untethered Dead Reckoning (UDR) and relies solely on the ZED-F9K module.
For optimal sensor fusion performance, odometer input from the vehicle should be provided to the
receiver to enable Automotive Dead Reckoning (ADR). For best overall performance, the setup should
be extended to also include Real-time Kinematic (RTK) functionality, which is described in chapter 4.
The basic evaluation process consists of four simple steps: installation, calibration, testing and
analysis. Follow the steps in this chapter to minimize errors leading to most common issues in
performance.
3.1 Installation
The installation step consists of attaching the device and antenna to the test vehicle.
3.1.1 Mounting the device
Find a suitable location in the vehicle where the EVK can be properly attached. A good location for the
EVK is in the trunk, close to the center of the rear axle of the vehicle.
Utilize appropriate hardware to firmly attach the EVK to the vehicle. The EVK must not be able to
move relative to the vehicle’s frame or encounter excessive vibrations. Do not attach the EVK to any
moving parts of the vehicle’s interior, such as a headrest or the rear-view mirror.
⚠ Sensor fusion performance will be impaired by changes in the orientation of the device.
3.1.2 Mounting the antenna
Place the provided GNSS antenna in a location with an unobstructed view of the sky, for example on
the roof of the vehicle. For best performance, ensure that the antenna has contact to a ground plane
which is at least 100–150 mm in diameter.
⚠ If the antenna is placed at a significant distance from the EVK, a position offset can be introduced
which might affect the accuracy of the navigation solution. To compensate for the position offset,
advanced configurations can be applied. Contact u-blox support for more information on advanced
configurations.
3.1.3 Connecting the cables
1. Connect the GNSS antenna to the RF connector on the front panel of the device.
2. Connect the device to a PC via USB.
3.1.4 Configuring the receiver (optional)
The default configuration of the LAP firmware is usable for basic automotive applications. A custom
configuration can be applied using u-center:
1. Open u-center.
2. Select the device with Receiver > Connection > COMXX.
3. Open the Messages View with View > Messages View.
4. Select the UBX-CFG-VALSET message.
5. Select the configuration item(s) with
Group
and
Key name.
6. Modify the values and send the message to modify the configuration.
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