In this paper

we report our progresses in developing a new digital BPM signal processor

which is based on embedded ARM microcontroller

FPGA digital signal processing and high speed ADC with band pass under-sampling techniques.Two major prototypes have been evaluated.The first algorithm evaluation prototype is built using commercial development toolkits modules in order to test various digital processing blocks such as digital down converter(DDC)

low pass filter(LPF) and decimator.The second prototype is designed and fabricated from chips level in order to evaluate the hardware performances of different functional modules and assembled processor. The beam experiments carried on SSRF storage ring show that the turn-by-turn beam position resolution is better than 2μm for both prototypes.Acquired turn-by-turn beam position data contain the correct real-time beam information

being suitable for machine study.