Use unique time window for reference measurement

If   is not checked, the time window settings for the reference measurement is the same as for the active measurement and can be opened from the  button.

In some measurements, the reference measurement time window should be set different than the active measurement time window. An example is if the reference measurement has a very short duration but the active measurement has a long duration. Then a shorter window should be applied to the reference measurement. To do this, make sure  is checked and click the  button to set the time window.