Go to Measurement->Settings... to display the dialog box shown in the figure below.
In , type the
estimated maximum approximate reverberation time, if you click on the list, you
get some alternatives.
It is also possible to type in another value that those.
Click the button to display help for more explanation.
In , note that
the measurement quality usually improves with increased measurement duration.
But an increased duration may be more demanding for the PC (especially if single
sweep is selected as will be discussed later).
Setting sampling frequency and sweep range
Alternative 1: Measure using a single sine sweep
Alternative 2: Measure using multiple sweeps