Unicog Wiki | Main / AcquisitionSetting

MEG channels

By default, all MEG channels are selected.

Auxilliary channels

Select EEG 61, EEG 62 and EEG 63 to record EOG H and V as well as ECG Right click on EEG 61 and 62 and select EOG. Right click on EEG 63 and select ECG. EOG H and V and ECG will be displayed on bipolar EEG channels.

Event definition

based on the TTL value that you attribuated to your event, this one has to be convert in binary format in the acquisition setting. You will find a table giving you all conversion from decimal to binary coding for all values from 0 to 255 (corresponding to the eight bits used to code the triggers) Conversion table

NB: the binary code in the table has to be read from the left to the right !!!

For the example given in the E-prime section, you will code your events

StdX: TTL value =17, corresponding to in binary code to 10001000

DvtX: TTL value = 81, corresponding to in binary code to 10001010

etc...

Recommendations:

It is also recommended to define an event for your subject's response. For example, if your subject is asked to press the right thumb button, you will have a TTL signal on STI 16. Your response event can be defined by the value 1 on the 16^th bit.