Multichannel Systems MEA2100-System Manual - Manual (Page 26)

MEA2100-System Manual
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Real-time Feedback with MEA2100-System
Important: The real-time feedback is not available in MEA2100-32- and MEA2100-Lite-Systems!
The interface board of the MEA2100-System is equipped with a high-capacity digital signal
processor DSP. By moving the detection and analysis of signals from the data acquisition computer
to the digital signal processor inside the interface, it is possible to run online filtering, analysis and
feedback stimulation in real-time. Please read also chapter “Real-time Feedback”.
At the moment, the real-time feedback is available for one instance of MC_Rack, that means for
one MEA2100-HS60, one MEA2100-HS120, or one MEA of a MEA2100-HS2x60.
By default, eight of the 16 bits of the digital channels are permanently assigned to the "Real-time
Feedback" function. For each of these eight bits, a different condition can be defined to release
a trigger signal. These eight bits can be monitored with the Digital Display. See also “Use of the
Digital Channel in the MEA2100”. The "Real-time Feedback" trigger signals are available in the
“Trigger Detector”, and can also be directly selected to start the internal stimulus generators.
See also chapter “Starting and Stopping the Stimulation”.
Setting up the Real-time Feedback Software
The "Real-time Feedback" works the same way as with the other data acquisition systems of
Multi Channel Systems. The "Real-time Feedback" tool must be the first instrument under the
data source. Click "Edit" menu and add “Real-time Feedback” or click the real-time feedback
icon in the toolbar. Please also read the chapter “Real-time Feedback” in MC_Rack manual
for details.
However, the dialog of the “Feedback Logic” tab is different for MEA2100-Systems. While the
user can freely assign up to 16 different detection conditions to the 16 bits of the Digital Out
channel in the other MEA- and ME-Systems, the MEA2100 offers by default up to eight conditions
permanently assigned to eight bits of the Digital Channel. See also “Use of the Digital Channel in
the MEA2100”.