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How Low in frequency can I go?

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Posted: 28 Dec, 2007
by: Collura T.
Updated: 28 Dec, 2007
by: Collura T.

Many people want to train at very low frequencies.  The BrainMaster equipment can operate at low frequencies, as follows:

The old grey 2E module and the black 2EW modules start falling off in low-frequency response around 0.6 Hz, and falls off gradually from there.  By 0.1 Hz, the response is negligible, and cannot be used for training.

The Atlantis modules use DC coupled amplifiers, and can be used to train much lower.  The Atlantis nominally works in a "2EW emulation" mode that responds similar to the 2EW.  It can practically train to about 0.5 Hz at the low end.

However, if you go to the Data Channels / Atlantis Hardware Control panel, there is a selection to set the Low-Frequency Cutoff to Low (<0.5 Hz), to extend the low range.  With this setting, the Atlantis can train to 0.1 Hz.

In a future release of the software, we will provide a DC signal through the Event Wizard, for people who want to work directly with the DC (0 Hz) signal.  We will also provide an extended low range for the EEG signals, so that they are trainable to and below 0.05 Hz.

 

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