Recording Experimental Signals > Recording Modes > Stimulator
A wide variety of stimulus voltage or current waveforms can be generated on analag output channels 0 & 1 and 5V TTL digital waveforms on up to 8 TTL digital output channels.
To generate a stimulus waveform, select a stimulus protocol from the Stimulator list and click the Start button.
(Stimulus protocols are also started automatically when the Record button is pressed.) Clicking the Stop button terminates the stimulus and returns the analog outputs to the holding levels.
The holding voltages applied to analog outputs can be changed by entering a new voltage then pressing the Enter key. (Note. Stimulus voltages waveforms generated during a voltage protocol are added to the existing holding voltages.)
Stimulus protocols can consist of a series of one or more pulses, incremented in amplitude or duration to create a family of pulses. Complex stimulus waveforms can be produced, including series of rectangular steps, ramps, and digitised analogue signals. Individual protocols can also be linked together to automatically apply a series of different protocols during an experiment. Protocols are created using the Stimulus Protocol Editor and stored as protocol files (*.xml files).
(Note. Stimulus voltage outputs are only supported with National Instruments and Cambridge Electronic Design laboratory interface units.)