The Reference I/O creates a reference to a signal, from any source. A reference is a copy of a signal at a specific moment. By connecting the Reference to a source or I/O, it is filled and then remains unchanged while measuring. The Reference can then be shown in a graph, or connected to another I/O. By making such a copy and continuing measuring, you will be able to see differences between the life signal and the reference. References can also be loaded with a "known good" signal of a device, to check life signals against this "known good" signal while troubleshooting a system.

The reference signal can also be used for further processing with I/Os, like e.g. subtracting the current signal from a reference from a previous measurement of the same signal, to see the changes in the signal.

Properties and actions

To control the behavior of the Reference I/O, several properties and actions are available. These can be accessed through a popup menu which is shown when the I/O is right clicked in the Object Tree. The properties can also be accessed through its settings window which is shown when the I/O is double clicked in the Object Tree. To open the Object tree, click the Show object tree Show object tree button.

Reference control

By default, the settings window only shows the most used settings. When Advanced is ticked, the extended window with all settings is shown. See also the program settings.


The Copy action can be used to copy new data from the life signal into the reference, renewing the Reference data.

Common properties and actions