Multichannel Systems Cardio2D Manual - Manual (Page 80)

Cardio2D Manual
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Click "HB Detection" tab in the "Analyze" dialog.
In this dialog you define the parameter for detecting the waveform of a field potential. Please see
also chapter "Automated Waveform Detection". Because you have to define these settings before
recording data, the same dialog appears in Cardio2D (MEA electrode window, "Analyzer
Settings").
The first parameter for detection is the "Rise Time". Select the minimum and the maximum of
the rise time from the drop down menus. The range involves 100 μs to 2 ms for the minimum rise
time, and 200 μs to 5 ms for the maximum rise time.
Next parameter is the "Amplitude". You can decide to have a fixed amplitude for detection
or a signal dependent amplitude. The fixed amplitude involves a voltage range from -10 μV
up to -1 mV. Using the signal dependent amplitude, the waveform detection is more flexible:
The detection routine detects the amplitude in relationship to the background noise. The
amplitude is calculated with its standard deviation in a range from -1 to -50. It is recommended
to use a signal dependent amplitude.
The following parameters characterize the detected field potential. "Detection Deadtime"
defines the time span in between no further field potential should be detected. The detection
dead time has to be longer than the time used for searching the minimum or maximum,
otherwise the following error message appears.