| 摘要 |
A device for detecting and measuring analog coherent frequency bursts (24) includes circuitry for digitally (82) translating the bursts upon their detection. Based on a frequency range estimate, a sampling frequency is selected to govern conversion of the analog burst to a sequence of digital values, which are stored to a sequential memory (84). The digital values later are read out of the memory (84) to a digital-to-analog converter (86) at a predetermined read frequency. The D/A converter (86) output is low-pass filtered (88) to provide a reconstructed analog burst. Sampling rates are selected to limit the frequency range of reconstructed bursts to a single octave, which enables subsequent signal processing with simpler circuitry, for reduced cost and improved accuracy and reliability of measurements obtained.
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