after changing over the usual buttons are available. The constant measurement using averagesis not necessary for impedance measurements and is deactivated.The measurement is started with:The result is displayed in on the right-hand axis of the diagram created.The two buttons at the left are for a single measurement.The two buttons in the middle are for a duration measurement with shows always the last curve.The two buttons at right are for a duration mean measurement. This measurement is importantfor the impedance because errors will be out of the curve.There are some professional speakers with impedance higher than 50 Ω.For them there is the switch in the PARAMETER menu to get the 250 Ω scale20.4 IMPEDANCE MEASUREMENT FROM 12HZFor the setting of bass-reflex boxes there is the need of a measurement in the range below20Hz. This measurement is carry out in the Thiele-Small measurement.59
