These three OEM circuit boards form the basis of a standalone, multi-channel phase-sensitive detection system designed principally as a cost effective electronic measurement solution for derivative spectroscopy and lock-in detection applications.

Rather than having to use a number of individual phase sensitive detection (PSD) modules (which provided unwanted and unused functionality) these boards provide a low-cost, high quality alternative solution. When used in conjunction with the additional professional laser driver board a complete OEM, four-channel PSD measurement solution with 9 bit phase control and derivative measurement capabilities at f, 2f and 3f can be easily achieved.