Fig 1. Montage creation All stanadrd Mitsar-EEG amplifiers have extra bipolar channels for extra biosignals recording. Following data can be acquired: Electrocardiogram (ECG or EKG)Electrooculogram (EOG)Electromiogram (EMG)RespirationAnd etc. Below is the scheme of electrodes placement of the subject body or face to record proper signal. It is also required to add POLY (BIO) channel to the montage like shown on the EEGStudio screen capture on Fig 1.Be aware that signal amplitude of EEG and biosignals could be different and it might be [...]
Mitsar-EEG-BT offer a few reference electrodes options. You can choose Reference electrode in software settings. The Reference drop down menu is available only after you have selected your amplifier in EEGStudio-Application Options - Hardware. Mitsar-EEG-BT amplifier reference electode selection in EEGStudio softwaare Following Reference option are available for Mitsar-EEG-BT amplifier: REF - Common reference*A1 - left earA2 - right earAA - linked ears (LE)Cz electrode * - Montages should be designed in conformity with Guideline 6: A Proposal for Standard Montages to Be [...]
You can use yellow LEMO plug on the front on the amplifier box to obtain digital event marks from third-party devices. This is 2 channel TTL input of the amplifier. LEMO connector type on amplifier side: PKA.M0.5GL.NJ Connector pinout:1 - GND2 - EVENT13 - EVENT2 LEMO connector type for cable: PAA.M0.5GL.AC39J You will see event mark from TTL input on the button of EEG screen.
To check the EEG amplifier performance you can use calibration (test) signal mode. In this mode the Mitsar-EEG switches EEG amplifiers inputs to the internal square wave generator 1,0 Hz frequency and 100uV amplitude. Data input from the sensors functionally differs from the calibration signal input only by the input signal source switching circuit. The obtained test signal should look as follows: Test procedure: Disconnect all sensors and electrodes from the Amplifier inputs.Choose monopolar montage with REF as a reference.Start calibration signal [...]
Mitsar-EEG amplifier have special analogue AUX channels for ERP system calibration and detection of external stimuli or events. AUX plug of Mitsar-EEG amplifier box. For AUX we use Circular connector by BINDER with following part numbers: Amplifier box side: 09-9766-20-04Cable side: 09-9767-71-04 Custom cable for connection to any third-part devices for event source could be designed upon request. AUX plug pinout. AAUX channels could be used to obtain analogue signals from different source including monitor screen, computer audio jack [...]
DB-25 EEG cap connector pinout for Mitsar-EEG-BT and Mitsar-EEG-202-24. Placement Pin# Placement Pin# Fp1 1 Fp2 14 F3 2 F4 15 C3 3 C4 16 P3 4 [...]