In step 1a, the check box should be checked if a transducer (e.g. a microphone) is connected to the
input. This makes sure that units are correctly set in the plot and also allows
you to specify the transducer sensitivity if individual calibration is
selected.
In
step 1b. select the unit of your transducer. If you are using a microphone
select the setting
.
If you are measuring using another transducer, see the FAQ section for more information.