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The start or stop of activity on the waveform selected by the "Y-axis W.F. #" is plotted with respect to the start or stop of activity on the waveform selected by the "X-axis W.F. #". A point is plotted for each cycle on the waveform selected by the "Cycle W.F. #", and the start or stop times are calculated relative to the start of the cycle in which they occur. If the "Normalization" option is enabled, times are calculated as a percentage of the cycle length.
If the option "Base X on stop time" is enabled, times for the end of activity, rather than for the start of activity, are used for the X coordinates. If the option "Base X on spike trains" is enabled, the start or end of spike trains for this waveform are used for the X coordinates, rather than the usual (duty cycle) activity. The "X-axis cycle offset" is used to effectively time-shift the cycles for the purpose of determining in which cycle a particular burst of activity or spike train falls. This allows more reliable results in borderline cases. For example, if a burst usually starts somewhat after the start of the cycle, but starts a bit early for a few cycles, you can select a negative offset of a few milliseconds so that these few bursts will properly be associated with the cycles in which they occur, even though they start a few milliseconds before the start of their associated cycles. Similarly, a positive offset can be used if a few bursts end slightly after the end of the cycle in which they occur. Note that this offset does not affect the calculation of the coordinate, so it is possible to get negative points plotted. Similar options for the Y-axis waveform exist, and are used in the same way.
If the "Cycle durations on X" option is enabled, the usual X-axis is overridden by the cycle durations. In other words, the graph becomes one of start or stop time of activity in cycle, versus cycle duration.