Displaying mode B,BB,4B,BM,M,PW,B/C,B/C/D,B/D,duplex, triplex, part zoom, CFM, CPA     Signal processing: Full-digital  beam  forming,  dynamic  filter,  space-time  filter,  dynamic  real  time   receiving  focusing,  RDA,  DRA,  spectral  processing,  CFM  processing,  gray scale   256, receiving signals dynamic range≥150, All diginal, real-time dynamic focusing,   dynamic apeture in all fields     Image conversion       Up/down conversion       Left/right conversion       Doppler Sound output volume adjustable     Wall filter adjustable       Base line adjustable       Sampling frame adjustable     Area changeable（angle changeable）     Spectrum sampling volume adjustable     Spectrum sampling volume angle adjustable     PRF adjustable       Image processing:         Gain control   TGC, PW Gain, CFM gain     General measurement B   mode-distance,   circumference,   area,   volume,   ration,   angle,   %   stenosis,     histogram       M mode- distance, time, velocity, heart rate       OB packages:   EDD table :GS ,BPD, CRL,FL,HL,TAD,LV,OFD,NT,AC,HC,AFI     GA and EDD calculated by LMP, BBT calculate GA and EDC, Fetal physiological     score, Fetal growth curve     OB measuring and calculation report     Uterine measurement (Cervical length, endometrial thickness, uterine volume)