When EEGer is unable to communicate with a Neurobit amplifier, it will report a red XSYNC issue in the bottom right corner of the wave screen. There are a variety of reasons this error may appear, including:

Amplifier Not Connected

If the amplifier is not connected to the computer, EEGer will not be able to receive data from it. Ensure the amplifier is connected to the computer with its cable. If using an external USB hub, try connecting the amplifier directly to the computer.

Amplifier Not Powered On

The Optima devices have a power button on the amplifier’s top case. This must be pressed to turn the amplifier on and allow it to transmit data to the computer. When turned on, a chime will emit from the amplifier.

Drivers Not Installed

If the drivers for the device are not installed, the computer can not communicate with it. This will prevent the software from ‘seeing’ the device and produce an XSYNC error. This can be characterized by the LED indicator light on the amplifier turning on when connected/powered on, but quickly turning back off after a few moments. On certain computers, Windows Updates must first be installed for the device drivers to install properly. To manually install these drivers, follow the steps below.

  1. Ensure the computer is connected to the internet.
  2. With the amplifier connected to the computer, right-click the Start button on the taskbar - by default, this is in the lower-left of the screen and should look like four squares.
  3. Select Device Manager from the list of options.
  4. A new window will appear. Under the section for Universal Serial Bus controllers we should see an entry for the amplifier. A small yellow warning icon should be visible on the device's picture.
    4.1. A quick way of identifying the amplifier is by disconnecting and reconnecting the device to the computer. When the device is unplugged, it will disappear from the list. When reconnected and powered on, it should appear in the Device Manager.
  5. Once identified, right-click on the device and select Properties from the context menu.
  6. Click the Driver tab followed by Update Driver - select Search automatically for updated driver software on the next screen that appears.
  7. This will begin searching online for the file, and will likely say 'No Drivers Found' or 'Best Drivers Already Installed' once the scan is complete. At the bottom of this screen, click Search for updated drivers on Windows Update.
  8. This will open up the Windows Update screen. Under optional updates, the Optima driver file should be available. Select this update and begin the update process.
  9. Once completed, the computer will need to be restarted.
  10. On some systems, users have had to install pending Cumulative and Feature Updates in order for the optional driver to appear. This can take some time depending on how long it has been since the computer was last updated.
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