Beam Position Phase Measuring system (BPPM) is one of the most important measurement systems for accelerator beam diagnostics and has a large amounts among the beam diagnostic equipment. The embedded digital beam position measurement system been developed can run independently and also can be used in the bus mode. It has satisfied higher demand for fast machine protection of high current and power linear accelerator, such as the realization of the difference BPPM. Besides, it has achieved self- detect intelligentize run and on-line calibration function. Its higher measuring accuracy is more suitable for the actual situation of the accelerator system in our country. The key technology of BPPM research includes high speed digital signal processing, low noise RF amplifier, embedded system development, etc.
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