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The first interface is part of the DAQ Control GUI, and is found by clicking the "Scan" button in the "Configuration" section of the main GUI window.  This opens a dialog which has two tabs : one for scanning an EPICS process variable ("PV") and one for scanning a DAQ trigger delay.

For the EPICS PV scan, the user chooses the number of steps, the name of the PV to control, and the start and stop value of that variable.  The scan points will be calculated linearly from the steps, start, and stop values:

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