I need to a) know if its built-in hardware circuit network amplify the raw signal and b) if its built-in hardware circuit network convert the raw signal to an average root-mean-square (rms).
I have worked with this system and the answer is yes for both: amplification and rms is hardware-based. Moreover each electrode has also a preamplifier.
When I worked with it, actually, it was a bit frustrating not having direct access to the raw emg (which could be useful for specific physiological researches)
Hi Davide,
Many thanks for your response. Do you know which is the band-pass filter (Hz) of this machine?
I need to know the frequency.
the signal is sampled at 1500Hz , band pass filtered at 8-1200Hz, rectified, smoothed and converted to RMS with a 20ms smoothing window. THe RMS is then re-sampled at 100Hz with a 16bit A/D converter and sent to the PC.
Many thanks for your help. Your comments have helped me a lot as I could not find that information anywhere.
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