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That makes sense. Thanks for pointing me to the FAQ. Somehow I couldn't find the documentation for this.

Why does the raw trigger data look like this: raw_trigger_data.png Close up showing expected shape of trigger with unexpected trigger values (and one of the intermittent huge negative spikes): closeup.png I would expect an integer value corresponding to the actual active pins on the parallel port co...

Cool. Thank you for the very detailed explanation. This now makes perfect sense. Typically I couple electrodes for things like this by putting them in globs of electrolytic gel. Obviously whatever electrolytic material is used to couple the electrode leads will not have infinite admittance and this ...

Thank you for the swift response. Unfortunately, I don't quite understand. What is meant by 'Connect the GSR and DRL electrodes to one of the GSR electrodes (no resistor needed)'. Did you mean connect CMS/DRL to on of the GSR electrodes? I get the rheostat between the GSR electrodes bit.

I wish to test the BioSemi GSR sensor with a potentiometer. If I understand correctly, the way to do it is to use the pot as a rheostat (i.e. leave the center terminal disconnected) and attach the GSR electrodes to the outer terminals of the pot. What I don't understand is how to connect the CMS/DRL...

I am trying to implement a C++ routine to do online GSR processing that will produce identical output as does ActiveView. I noticed a numerical issue and I am not sure the right thing to do. The preprocessing pipeline, among other things, downsamples the raw data from the GSR Aux channels. This mean...

I am writing a data acquisition client in C/C++ and I am a bit confused on this point. Here: https://www.biosemi.com/faq/make_own_acquisition_software.htm (at the table on the bottom) the aux channel count appears to be 16 (after EEG and Ex), but here: https://www.biosemi.com/faq/adjust_samplerate.h...