Multichannel Systems MEA2100-System Manual - Manual (Page 25)

Software
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To record the digital data stream in the data file, please enable the respective check box
in the “Channels" tab of the Recorder tool.
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Triggering on Stimulation Pulses from Internal STGs
It is possible to trigger on stimulation pulses from any of the three internal stimulus generators.
The three internal STG units send a trigger signals with each stimulation pulse on bits 4, 5 and 6
of the digital channel, Stimulus 1 on bit 4, Stimulus 2 on bit 5 and Stimulus 3 on bit 6. Please see
chapter “Use of the Digital Channel in the MEA2100” for more details. So to trigger, for example
on each pulse of Stimulus 1, a Trigger detector in MC_Rack must be set to the Digital Channel,
bit 4. Please see screenshot below.
It is also possible to set the trigger detector to react on a signal from any of the three STG units.
This might for example be useful to start a triggered recording if a stimulus is applied from any
of the STG units. All three bits must be unmasked, and the bit value must be defined as > 0.
See chapter “Triggering on TTL Pulses” for more information.
Triggered recording and any instrument which is below the Trigger Detector in the virtual tree
of MC_Rack can now work in relation to the selected STG unit(s).