TSI is the only instrument supplier that developed two powerful, digital processing techniques for extracting flow velocity and particle size information from Doppler signals. IFA 750/755 series processors demonstrated the importance of matching the processing approach to the nature of the signal. RSA signal processors, on the other hand, were the first to incorporate digital signal processing for extracting size and velocity data. We've taken the best features of both the IFA and RSA processors, enhanced them, and combined them with the latest technology advancements to create a state-of-the-art, high performance digital burst processor-the FSA Processor. With sampling rates up to 800 MHz and 8 bit analog to digital conversion (ADC), the FSA processor family opens new doors to measurements of high speed, low SNR situations.