Important Note
This article is applicable to 4-channel and 8-channel analog biosignalsplux devices. The presented information does not apply to Hybrid-8 devices.
Most of the biosignalsplux sensors are analog sensors which can be connected to any of the available 4 to 8 analog channels of the biosignalsplux hubs.
The FNIRS and SpO2 sensors are an exception as these sensor provides a digital output that must be connected and configured differently.
Find below all the instructions on how to set-up yours sensors
Step 0: biosignalsplux Firmware Requirements
Devices shipped after 2020 already come with an SpO2 and FNIRS compatible firmware pre-installed (version 3.4 and newer) and may not require to proceed with this step.
You can still proceed to ensure that your device has a compatible firmware installed, just in case.
Check for the firmware version of the device by following the steps below and update if necessary.
Open OpenSignals and enter the OpenSignals device manager.
Click your biosignalsplux device and click the info icon in your device panel, where you will find the firmware version of your device.
You can update your device’s firmware by clicking on the UPDATE FIRMWARE VERSION icon and follow the instructions displayed in OpenSignals. We recommend updating to firmware versions newer than 3.4 for best experience with your sensor.
Step 1: Connecting the fNIRS Sensor
The FNIRS sensor is a digital sensor, reason for which it must be connected to the ground/reference channel (digital interface) of your biosignalsplux. This channel is marked with a “down-arrow” as highlighted in the image below:
Note: Current biosignalsplux versions do only support the use of one FNIRS sensor per device. The image above shows an 8-channel device, however, the FNIRS sensor must be connected to the same channel on 4-channel devices.
Step 2: Sensor Configuration
Open the OpenSignals Software and enter the device manager to configure your device with the FNIRS sensor.
Newer versions of OpenSignals may automatically detect the FNIRS sensor and you can refresh the setup by clicking on READ SENSORS. Alternatively, you can also set up the FNIRS sensor manually should you not have this feature in your OpenSignals.
Set the channel types to fNIRS and set the intensity of the red and infrared LEDs using the RED and IR sliders. Activate the channels 9 and 10 (circles on the channel must turn blue) and activate the device for signal acquisition (ENABLE field must be blue). If configured correctly, the device panel should be similar to the one shown in the screenshot below:
Step 3: Signal Acquisition & Visualization
Start the signal acquisition with OpenSignals by clicking on the red button in the OpenSignals main interface.
After the acquisition, you can open your acquisition in the signal visualization mode:
