Each time you press the RUN button (or ctrl-R) all waveforms will be reloaded and the execution of the script will start. It can be terminated by STOP button (ctrl-H).
The Script is a software-based extension to the normal mode of the waveform generator operation and has several important limitations. The two memory banks are no longer updated to hold the same data at all times. Alternatingly one memory bank is used for waveform generation, while the other memory bank is used to perform the waveform rolling in a background in order to prepare the generator for the next step in the script. In this way there is no delay between the steps.
Limitation: it is not possible to update waveform parameters, nor to move the trigger point, during execution of the script. Generally - issuing a command that causes a memory swap in the generator results in incorrect calculation of the waveform roll.
The frequency can be altered by using an external generator.