How to use a sinusoidal excitation signal?

Set Sinusoid as measurement mode in the Measurement Selection Toolbar as shown below.

Since WinMLS was designed for MLS measurements, the length of the sinusoid is set by the Sequence Order and Averages on the Measurement Settings toolbar. The relative level and frequency of the sinusoid is set in Measurement->Sinusoid settings…, but the frequency is adjusted so an integer number of periods fit into the sequence length specified. Because of this, averaging can be used. If the sinusoidal signal is to be played back for a long period, use either several averages or use Measurement->Test Current Level(s).