Abstract
The LISA Technology Package (LTP) will verify the performance of the inertial sensors that are being developed for the LISA mission. The position of the test masses will be read out by a heterodyning laser interferometer system with the phase of the detected signals also providing measurements of their angular alignment. The electronics required to measure the relative phases of the signals from the photo-detectors has been developed as part of an ESA contract and preliminary results of bench testing the unit are presented.
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