Number of sequences to pre-send

This parameter decides how many times the excitation signal is to be played before the input signal is recorded and the measurement actually takes place.

When measuring using the MLS method, the excitation signal must be played at least once before recording the result. This is because the system to be measured has a transient immediately after the excitation that must be suppressed. After playing one sequence, this should have died out if the other parameters are correctly set. Therefore, the number of sequences to pre-send should be set to 1 or more when using MLS as excitation signal. If no excitation signal is used, this parameter is ignored.