Knowledge Base

Bitbrain Diadem EEG and The Observer XT

Introduction

The BitBrain Diadem is a 12-channel wearable and portable, dry EEG device designed for real-world applications that require easy set-up and high signal quality. The Diadem system is designed to address the pre-frontal, frontal, parietal and occipital brain areas to measure emotional and cognitive states such as cognitive workload.

The Diadem has been designed for adults. It can be used for children from the age of 10. The sample frequency is 256 Hz and battery life is more than 8 hours.

Sensor Layout

The headband includes 12 EEG sensors, plus ground (GND) and reference (REF). The sensors are placed at positions AF7, Fp1, Fp2, AF8, F3, F4, P3, P4, PO7, O1, O2 and PO8, according to the EEG 10/10 international standard. REF is located on the ear clip.

The correspondence between channel numbers and sensors is as follows:

• Channel 1: AF7
• Channel 2: Fp1
• Channel 3: Fp2
• Channel 4: AF8
• Channel 5: F3
• Channel 6: F4
• Channel 7: P3
• Channel 8: P4
• Channel 9: PO7
• Channel 10: O1
• Channel 11: O2
• Channel 12: PO8

About This Technical Note

This document describes how to achieve automatic synchronization between observational data in The Observer XT and EEG data acquired with and exported from a Bitbrain system. You can:

• Start and stop data acquisition in the Bitbrain Acquisition software from The Observer XT.
• Manually import Bitbrain EEG data into The Observer XT after the observation is ready.

System Tested

Processing Unit: Dell Precision T3660

• Processor: Intel Core i7 12700K (12 Core), 3.6 GHz or better
• Internal memory: 16 GB
• Operating system: Windows 10 and Windows 11 Professional Edition

Software:

• The Observer XT 16 or higher
• N-Linx Server 1.4 or higher
• N-Linx Agent 1.4 or higher
• BitBrainControl 1.0 software to control the EEG device
• Bitbrain Acquisition 0.3 software — the acquisition software for the Bitbrain device

Note: Tests were carried out with all the software on one PC. You can also use two PCs and set up a local network. In that case The Observer XT and N-Linx Server are installed on PC 1, and the BitBrain Acquisition software, the Bitbrain Control software and N-Linx Agent are installed on PC 2.

For Further Information and Help

Other Manuals:

• User Guide - Diadem - Bitbrain
• The Observer XT Help
• The Observer XT Quick Start Guide
• N-Linx - Reference Manual

Customer Support: For technical support, please visit the MyNoldus portal (my.noldus.com). Log into your account or create a new one and submit a support case.