bci2000.org BBS

We are trying to set up the parameters for recording the initial mu session for Biosemi. In the source Tab, under signal type, when we set it to 1, it says it should be set to 2 (for recording in Biosemi). However, when we set it to 2 we get an error message that the setting must be less than 1.

Please help!!

Emily,

in the current version of the contributed Biosemi source module at
http://www.bci2000.org/svn/trunk/src/co ... ce/Biosemi, I cannot identify a "SignalType" parameter.

Could you provide me with some more detail about your version of BCI2000, and your Biosemi source module?

Thanks,
Juergen

Hi Juergen,
Thanks for responding so quickly. We're using BCI2000 version 2.0, with the Biosemi source module compile from r1656.

Tony our programmer just had a look at the Biosemi source code, and found 5 occurrences of "SignalType" in Biosemi2ADC.cpp.
The first occurrence is on line 76 in BEGIN_PARAMETER_DEFINITIONS

I'm not sure if I was clear in the first post it is the parms/fragments/amplifiers biosemi parameter definitions that we are talking about.

thanks Emily

Hi Juergen,
Just another clarification.
Tony has already downloaded the source code for Biosemi and compiled the acquire module. Found at [url]http://www.bci2000.org/svn/trunk/src/co ... iosemi[url]

So we are assuming that section is ok.

We attempted to trial an intial mu session or inspection of EEG signals however we couldn't find a fragment amplifier parameter file specific to biosemi in the contributions section.

So we attempted to modify the signalGenerator.prm file found in parms/fragments/amplifiers directory. It was here that we encountered the signal type error.

Is there a biosemi parms/fragments/amplifier parmeter file available that we can't find or is it the case that we do need to modify the SignalGenerator.prm file.

If we do need to modify the SignalGenerator.prm file, then what do we need to put in signal type field (see initial post).

Thanks,
sorry for any confusion I'm still getting my head around it.

Emily,

Thanks for responding so quickly. We're using BCI2000 version 2.0, with the Biosemi source module compile from r1656.

the current revision of Biosemi2ADC.cpp is 1658. I suggest you update to that revision, which does not contain the SignalType parameter any more.

Is there a biosemi parms/fragments/amplifier parmeter file available that we can't find or is it the case that we do need to modify the SignalGenerator.prm file.

To configure your system, just load the SignalGenerator.prm file. Depending on your hardware configuration, this should work, or result in a (hopefully instructive) error message. In the second case, use the operator module's parameter configuration dialog to modify parameter settings as suggested. Once you have a working configuration, save it as Biosemi.prm.

Unfortunately, I don't have a Biosemi amplifier available, so I cannot provide you with a functional parameter configuration file.
Still, I'll try to help if there are further problems.
Alternatively, you might also contact the contributed module's author(s) for assistance.

Best regards,
Juergen