High-frequency signal sources based on digital techniques include arbitrary waveform generators (AWGs) and direct digital synthesizers (DDSs). Both types of signal sources have gained in frequency and bandwidth over the years, thanks to the enhanced performance of digital components such as digital-to-analog converters (DACs).
AWG- and DDS-based signal sources are both able to create complex output waveforms with high switching speeds, although DDS sources running at high clock freque
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