Plexon Stimulator 2.0, Руководство пользователя

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6.5 Arbitrary Waveform Patterns
Arbitrary waveform patterns are stimulation patterns that are defined in text files with a .pat
extension. Check the box at the far right of the row of controls next to where it says arbitrary
waveform pattern to disable the rectangular pulse controls and enable the arbitrary waveform
pattern load button. Click on the Load Ch N button to select and open an arbitrary waveform file.
When the file is opened, a graphical representation of the arbitrary waveform is displayed.
Two arbitrary waveform pattern file formats are supported. One file format uses a fixed sampling
rate and the other file format uses a variable sampling rate.
6.5.1 Fixed Sampling Rate
In the fixed sampling rate file format, the first line of the file contains the keyword “fixed”. The
second line of the file codes for a single duration parameter expressed in microseconds. The
subsequent lines of the file contain a series of current amplitude values expressed in nanoamps.
When the stimulation pattern is played back, each current amplitude from the file is played for the
fixed amount of time specified by the duration parameter. The fixed sampling rate format is
especially useful for coding continuously varying shapes such as the action potential waveform.