QEEG-64FX Device Control Filter Selection

QEEG-64FX Device Control Filter Selection

It can be individually applied to each signal group and can be selected according to the frequency of the measurement target.

High Pass Filter

0Hz,0.1Hz, 0.5Hz, 2.5Hz, 12.5Hz, 25Hz.

  • 0Hz is a mode that does not apply HPF and includes DC component.

HPF Detailed characteristics for each frequency: See Appendix A.

Low Pass Filter

 Sampling frequency  LPF frequency
 250Hz 12.5Hz, 25Hz, 50Hz, off
500Hz 25Hz, 50Hz, 100Hz, off
1000Hz 50Hz, 100Hz, 200Hz,  off
2000Hz 100Hz, 200Hz, 400Hz, off


Typical filter selection by measurement target.

– The table below is a typical example and can be changed according to the purpose of experiment.

Measurement target HPF LPF
EEG Spontaneous Potential 0.5Hz, 2.5Hz More than 50Hz
EOG 0.1Hz 12.5Hz
ECG Simple monitoring 2.5Hz 25Hz
ECG Waveform Details 0.1Hz, 0.5Hz More than 100Hz
EMG 12.5Hz, 25Hz More than 400Hz

QEEG-64FX’s EOG and ECG channels are bipolar input channels and can be used for EMG and EEG measurements.