Gain/Offset for NeuroScan SynAmps RT high-level input
Posted: 07 Mar 2014, 21:37
I am currently recording EEG data using BCI2000 and NeuroScan SynAmps RT equipment.
I would like to use an external event marker to synchronize my EEG data files with separate EMG data files. I have the hardware to feed a 5 volt event marker to both systems. I am trying to use one of the two high-level input channels of the SynAmps for this purpose, which seems to be fairly straight forward.
In the Acquire software, I have followed the proper process to configure and add a channel. So the high-level event marker should be recorded alongside the EEG data, as an extra channel.
In BCI2000, I have adjusted the number of channels, channel names, and number of SourceChGain/SourceChOffset entries appropriately. However, I am receiving the usual "LSB" error when I try to run the system, which makes me think that I need to correct the SourceChGain (and possibly offset) value for the high-level channel. I would think that the ADC LSB conversion factor would be different for the high-level channel, but it seems to be the same in the Acquire settings.
Does anyone have experience using the SynAmps RT (or 2) high-level input channel(s) with BCI2000?
Would the NeuroGetParams tool give me the correct settings, despite their matching appearance in the Acquire settings menus?
I would like to use an external event marker to synchronize my EEG data files with separate EMG data files. I have the hardware to feed a 5 volt event marker to both systems. I am trying to use one of the two high-level input channels of the SynAmps for this purpose, which seems to be fairly straight forward.
In the Acquire software, I have followed the proper process to configure and add a channel. So the high-level event marker should be recorded alongside the EEG data, as an extra channel.
In BCI2000, I have adjusted the number of channels, channel names, and number of SourceChGain/SourceChOffset entries appropriately. However, I am receiving the usual "LSB" error when I try to run the system, which makes me think that I need to correct the SourceChGain (and possibly offset) value for the high-level channel. I would think that the ADC LSB conversion factor would be different for the high-level channel, but it seems to be the same in the Acquire settings.
Does anyone have experience using the SynAmps RT (or 2) high-level input channel(s) with BCI2000?
Would the NeuroGetParams tool give me the correct settings, despite their matching appearance in the Acquire settings menus?