Dynamic Excursion Check and Control (DCX)

The DCXoption is an add-on for the SPL and the EQA-Task of the Klippel QC-Software. It expands the acoustic test options of both tasks with the capability of transducer excursion laser measurement. Mechanical excursion testing is a robust method of checking the maximal displacement and the frequency dependent voice coil or diaphragm position. Note that electrical methods based on modeling can also assess those parameter (MSC module). 
The SPL task with DCX option can check the envelope, the peak/bottom excursion and the dynamically generated offset of the coil position, which is a crucial property of voice coil stability. The EQA task with DCX option can control the excursion of any transducer to a given target envelope and even compensate for dynamic coil offset. With this option a maximum excursion can be defined and a level profile derived that can be applied in a following measurement step by the SPL task for actual measurement. Since excursion is a dominant cause of nonlinear distortion, critical distortion tests can be designed that represent a worst-case operation scenario.