Serial port settings dialog. This feature requires a VISA runtime engine to be installed. Some computers, especially notebooks, do not have a serial port input. The socket must exactly look like this: If your machine has one, all you need is a soldering iron, a 9 pin plug and a cable with up to 6 cores, depending on what you plan to do. For connection details see the help page of the dialog. If you scan flickering signals, set a threshold value to filter out short intervals (click "offset" in the main program to switch to "threshold").