Filtering EMG Data using Dataquest ART
- The bottom most signal is the EMG signal
- The next one up is the EMG filter with a High Pass filter at 50-75 Hz. To do this:
- Select the EMG signal
- Right-click and select Filter Actions - High Pass
- Enter a Low end cutoff of 50-75 Hz
- Click OK
- A new data series will be added to the top of your Analysis window labeled Animal ID.EMG.Highpass
- The 3rd graph from the bottom is that high pass filtered data Half Wave Rectified. To do this:
- Select the filtered EMG signal from step two above (series name Animal ID.EMG.Highpass)
- Right-click and select General Actions - Half Wave Rectification
- A new data series will be added to the top of your Analysis window labeled Animal ID.EMG.Highpass.HWRectification
- The top graph is the Half Wave Rectified signal from step 3 filtered with a low pass filter
- Select the signal generated in step 3 above (series name Animal ID.EMG.Highpass.HWRectification)
- Right-click and select Filter Actions - Low Pass
- Enter a High end cutoff of 3 Hz
- Click OK
- A new data series will be added to the top of your Analysis window labeled Animal ID.EMG.Highpass.HWRectification.Lowpass
- Next you can graph all of these together on one graph, as shown in the manual by:
- Hold the control key down on the keyboard and select all four series generated in the above steps, to highlight the four data series
- Right-click and select Display Actions - Plot
- Choose to Plot by Series Order
- Click OK
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