Visualization

Visualize ExG, orientation, spectral analysis and relative bandpower data in real-time by navigating to the Visualization page.

You can configure the visualization via the drop-down menus at the top of the Visualization page or by selecting Filters.

Settings include:

Y-axis scale – change the range of the y-axis.
- 1 uV to 100 mV range.
Time window – change the time interval of the x-axis.
- 5, 10, or 20 second range.
Record (see Recording Section).
Event markers (see Event Markers).
Filters.
LSL push button.

ExG

Example of Explore Desktop's ExG plot — Example of an Explore Desktop ExG plot.

It is also possible to scroll back in time when visualising signals. Please note that changing the sampling rate during the visualisation may lead to odd behaviour when scrolling back in time.

Real-time packet loss visualization

Indication of samples lost in seconds

Bluetooth samples lost in seconds in footer — Packet loss quantization.

Motion sensors

Example of Explore Desktop's motion sensor plot — Example of an Explore Desktop motion sensor plot.

Spectral analysis

The spectral analysis plot is calculated using the FFT (Fast Fourier Transform). The colours of the channel lines map to positions on the head if standard positions are selected (using the 10-10 system). If a channel has no standard position name assigned, it uses a colour from a default colour scheme.

The colour map for the standard positions can be shown by clicking the ? button above the plot.

Example of Explore Desktop's spectral analysis plot with an image of the colour map overlayed — Example of an Explore Desktop spectral analysis plot with a pop-up showing the colour map for standard positions.

Bandpower over time

Filters

The Visualization page will prompt you to define your visualization filters. Explore Desktop will begin streaming data once you have selected your filters.

You will still be able to filter signals while the device is streaming. To do so, select Filters.

The following filters are available:

Notch filter (band stop filter) – attenuates the power line noise at 50 or 60 Hz.
Low cutoff frequency – rejects signals with frequencies below this threshold.
High cutoff frequency – rejects signals with frequencies above this threshold.

Filters do not affect raw data, only what is visualised.

For more information or support, do not hesitate to get in contact at: support@mentalab.com