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.
|EEG Spontaneous Potential||0.5Hz, 2.5Hz||More than 50Hz|
|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.