Multichannel Systems STG1000 Manual - Manual (Page 56)

Stimulus Generator 1000 Series User Manual
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saving power and suppressing noise. Otherwise, the stimulus generator tries to hold a stable
current against the indefinite resistance of the open current output.
• The output signals are inverted (multiplied by 1) if you use the U outputs.
• If you use the voltage between +U and U, the output signal amplitude is doubled. U represents
the ground (replaces GND) in this case. See illustration "Voltage mode: Doubled output signal
amplitude".
• A bipolar stimulation is recommended for extracellular recordings from microelectrode arrays
(MEAs) if a very high output signal density in a defined area between two neighboring
stimulating electrodes is needed. The current that is delivered by the first electrode flows directly
back to the second electrode so that the surrounding tissue is not affected. See illustration
"Voltage mode: Bipolar stimulation".
• In the following example, you see a signal in the MC_Stimulus display and the resulting output
signals for the different connection options (viewed in an MC_Rack Data Display).
Programmed stimulus protocol viewed in MC_Stimulus:
STG output signals: