Abstract: A real-time spectrum analyzer (RTSA) includes an analog-to-digital converter (ADC) configured to convert in real-time an input analog signal into a digital input data stream, a digital down-converter (DDC) configured to down-convert in real-time the digital input data stream into a down-converted input data stream, a fast Fourier transform (FFT) unit configured to generate in real-time FFTs of the down-converted input data stream, an acquisition memory circuit configured to store in real-time the FFTs generated by the FFT unit, and an analyzer configured to read in non-real time the FFTs stored in the acquisition memory.

Abstract: A system and method are provided for displaying input signals from a DUT on a display screen. The method includes sending a data stream of digitized data received from the DUT to an FPGA for serial decoding; receiving decoded symbols from the FPGA; identifying valid symbols among the decoded symbols indicating transitions between the decoded symbols; storing the valid symbols with corresponding time-tags as valid packets in memory, and discarding ones of the decoded symbols occurring between the valid symbols; and plotting on the display screen the valid packets occurring between beginning and ending valid packets of the stored valid packets. The beginning valid packet has a corresponding time-tag occurring immediately before a first point time-tag associated with a left edge of the display screen, and the ending valid packet has a corresponding time-tag occurring at or immediately before a last point time-tag associated with a right edge of the display screen.

Abstract: A real-time spectrum analyzer (RTSA) includes an analog-to-digital converter (ADC) configured to convert in real-time an input analog signal into a digital input data stream, a digital down-converter (DDC) configured to down-convert in real-time the digital input data stream into a down-converted input data stream, a fast Fourier transform (FFT) unit configured to generate in real-time FFTs of the down-converted input data stream, an acquisition memory circuit configured to store in real-time the FFTs generated by the FFT unit, and an analyzer configured to read in non-real time the FFTs stored in the acquisition memory.