Does anyone know how to monitor the process ISP:FSCR ON in a PSA E4440A? There is a delay when I send the SCPI command (:DISP:FSCR ON). The PSA doesn't respond immediately. It takes a time till the display is shown into fullscreen. This is driving me crazy cause the PSA continues processing commands, but the display is not yet in fullscreen. I need to monitor the process in order to know when it has finished succesfully. I've tried with OPC and WAI. They don't work.