Knowledge Base

2. Automatic Import into The Observer XT

Software Installation

• The Observer XT 17
• MediaRecorder 6.5
• N-Linx Server 2.0, for communication between The Observer XT and other applications.
• N-Linx Agent 1.5.1.0
• Noldus Tobii Glasses 3 Control — N-Linx plug-in 1.0.1.0.
• Tobii Pro Glasses 3 controller application — You can download this software from the Tobii website (www.tobii.com).

The solution was tested with one pair of Tobii Glasses 3. The solution does not work with the Tobii Glasses 2. The solution was tested with all software on one computer.

If you ordered a new computer from Noldus Information Technology when you purchased the solution, all the software is already installed and tested. If you bought your own computer, please follow the instructions below. You can download the installation files via your MyNoldus account. Browse to my.noldus.com and log in or create an account.

Install The Observer XT

1. Download the Observer XT installation file via your MyNoldus account (my.noldus.com, Downloads > The Observer XT > Versions > Current version).
2. Double-click the installation file to run it.

Install MediaRecorder

1. Download the MediaRecorder installation file via your MyNoldus account (my.noldus.com, Downloads > MediaRecorder > Versions > Current version).
2. Double-click the installation file to run it.

Install N-Linx Server

1. Download the N-Linx Server installation file (N-Linx_Server_Setup.exe) via your MyNoldus account (my.noldus.com, Downloads > The Observer XT > Drivers & Tools > Drivers for current version > N-Linx Server Setup 2.0 > Download).
2. Double-click the installation file to run it.

Install N-Linx Agent

1. Download the N-Linx Agent installation file (N-Linx_Agent_Setup.exe) via your MyNoldus account (my.noldus.com, Downloads > The Observer XT > Drivers & Tools > Drivers for current version > N-Linx Agent Setup 1.5.1 > Download).
2. Double-click the installation file to run it.

Install Noldus Tobii Glasses 3 Control

1. Download the Tobii Glasses 3 Control installation file (TobiiGlasses3Control.Installer.exe) via your MyNoldus account (my.noldus.com, Downloads > The Observer XT > Drivers & Tools > Drivers for current version > Tobii Glasses 3 Control Installer > Download).
2. Double-click the installation file to run it.

Enable N-Linx in MediaRecorder and The Observer XT

Settings in MediaRecorder

1. From the File menu select Preferences > N-Linx Settings.
2. Select Allow communication with N-Linx Server.
3. The Client name field is filled in automatically and cannot be changed.
4. The Computer name field is filled in automatically and cannot be changed.
5. In the N-Linx Server address field, leave the default value localhost.
6. In the N-Linx Server port field, leave the default port 5672. Ask your administrator if this port is used by another program.
7. When the connection with N-Linx Server is established the Status will be Connected. Click OK.

Settings in The Observer XT

1. From the File menu select Preferences and then N-Linx Settings.
2. Select Use N-Linx Server to connect with other applications.
3. In the N-Linx Server address field, leave the default value localhost.
4. In the N-Linx Server port field, leave the default port 5672. Ask your administrator if this port is used by another program.
5. Click Test Connection and check that the Status is Connected. Then click OK.

Edit Config Files

Edit the Noldus.Proxy.TobiiGlasses3.Config File

1. Run N-Linx Agent to create the config file: in the Windows search field, type N-Linx Agent and click on the name of the app in the list that appears to run it.
2. Stop N-Linx Agent: click the Show Hidden Icons icon in the lower-right corner of your screen, right-click on the N-Linx Agent icon and select Exit.
3. Open Notepad and from the File menu select Open and browse to C:\ProgramData\Noldus\TobiiGlasses3 Control\1. Note: The ProgramData folder is a hidden folder. To view this folder, browse to C:\ and on the View tab select Show and then Hidden Items.
4. In the lower-right corner of the window that opens, select All Files (*.*) and open the file Noldus.Proxy.TobiiGlasses3.config.
5. RabbitMQAddress — Do not change the line <RabbitMQAddress>localhost</RabbitMQAddress>.
6. RabbitMQPort — Do not change the line <RabbitMQPort>5672</RabbitMQPort>.
7. IsFirstTimeConfig — Enter false instead of true in the line <IsFirstTimeConfig>true</IsFirstTimeConfig>.
8. TobiiGlasses3Address — Do not change the line <TobiiGlasses3Address>192.168.75.51</TobiiGlasses3Address>.
9. TobiiGlasses3DeviceId — Replace the ID in the line <TobiiGlasses3DeviceId>tg03b-080200044301</TobiiGlasses3DeviceId> with 9fbb7a3f-5c0b-485f-b531-70384f925222.
10. TobiiGlasses3HostId — Add the following line to the config file: <TobiiGlasses3HostId>9fbb7a3f-5c0b-485f-b531-70384f925222</TobiiGlasses3HostId>.
11. TobiiGlasses3DisplayName — Replace the ID in the line <TobiiGlasses3DisplayName>tg03b-080200044301</TobiiGlasses3DisplayName> with the ID of your Tobii Glasses that you can find on the sticker at the back of the recording unit.
12. TobiiGlasses3AutoDetect — Enter false instead of true in the line <TobiiGlasses3AutoDetect>true</TobiiGlasses3AutoDetect>.
13. Save the config file.
14. Restart N-Linx Agent: click the Windows button and type N-Linx Agent in the search field. Click on N-Linx Agent in the list that appears.

Edit the MediaRecorder Config File

1. Open Notepad and from the File menu select Open and browse to C:\ProgramData\Noldus\MediaRecorder\6. Note: The ProgramData folder is a hidden folder. To view this folder, browse to C:\ and on the View tab select Hidden Items.
2. In the lower-right corner of the window that opens, select All Files (*.*) and open the file Noldus.MediaRecorder.config.
3. Edit the second-to-last line and change false into true.
4. Save the config file.

Edit the Noldus.UMR.GazeOverlay.Config File

1. Log into your MyNoldus account (my.noldus.com) and download the Noldus.UMR.GazeOverlay.config.xml file (my.noldus.com, Downloads > The Observer XT > Drivers & Tools > Drivers for current version > Noldus.UMR.GazeOverlay.config > Download).
2. Enter the GazeOverlayChannel name. This should match the TobiiGlasses3DeviceID of the Noldus.Proxy.TobiiGlasses3.config file (9fbb7a3f-5c0b-485f-b531-70384f925222).
3. Save the file in C:\ProgramData\Noldus\MediaRecorder\6. Make sure that you save the file with the extension *.xml.

Prepare the Tobii Glasses

1. Connect the glasses with the recording unit, insert a battery and SD card in the recording unit and switch the recording unit on by pressing the button.
2. Check that the button is green. If the button is orange or red the battery is low or empty. In that case, insert a new battery.
3. Connect the Tobii Glasses with the PC via Wi-Fi: click the Wi-Fi icon in the lower-right corner of your screen and click the Tobii Glasses name (starting with TG).
4. If this is the first time you connect the glasses, fill in TobiiGlasses as the password.
5. Start the Tobii Pro Glasses 3 controller application. The live view of the glasses should be visible on your screen now.

Prepare MediaRecorder

1. Start MediaRecorder and click the Video Settings button.
2. Under Video name change Video 1 into Tobii Glasses 3. Note: The settings for the Tobii Glasses must be made for Video 1 (the first line in the Video Settings). If you choose Video 2, Video 3, or Video 4, the gaze data will not be imported into The Observer XT.
3. Under Video device select RTSP IP Camera (Noldus RTSP Source Filter).
4. Click the Advanced Video Settings icon and enter:
   • IP address: 192.168.75.51
   • Port: 8554
   • User name: root
   • Password: Noldus
5. Click Get Device Properties and in the Connection string field enter: /live/all?gaze-overlay=true
6. Click OK twice. You should now see the live view of the Tobii Glasses in MediaRecorder.

Prepare The Observer XT

1. Start The Observer XT, create a new project, give it a name and click OK.
2. Read the text in the Data Transparency window and the End-User License Agreement and click OK.
3. Click Set Up Project and under Observation source select Live Observation. The Devices window opens.
4. Select MediaRecorder 6-<computer name> and TobiiGlasses3 Control 1.0-<computer name> and check that the status of both is Enabled, Running.

Run a Test

Prepare the Test Participant

1. Brief the participant and ask him/her to sign the consent form.
2. Help the participant to wear the eye tracker glasses.