This option adds a range of pre-programmed zone plate patterns along with user defined controls over several parameters which can be saved to custom buffers. Using the Main menu>memories window, multiple saves of zone plates can be saved to the system by checking the video box and saving by name. In use the zone plate can be used to test a range of video processing requirements using horizontal, vertical and temporal (time) controls. Temporal control is particularly useful for testing up/down converters and applications which compress signals. Aspect ratios can be tested using the horizontal and vertical controls. Frequency sweep is particularly useful and also available using this option. By feeding in the signal generated, the output of the device can be sent back into the Sx’s waveform monitor to determine the usable bandwidth of the system. Once purchased, the zone plate editor is reached by selecting the button next to the standard zone plate.