OCCUPANCY MEASUREMENT AND TRIGGERING IN FREQUENCY DOMAIN BITMAPS
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Abstract
A method is disclosed for triggering upon signal events occurring in frequency domain signals. The method includes repeatedly sampling a time-varying signal and generating a plurality of digital frequency domain spectrums based on the samples of the time-varying signal. A frequency domain bitmap for the time-varying signal is repeatedly updated via application of the digital frequency domain spectrums. The method further includes selecting a portion of the frequency domain bitmap, determining a signal occupancy in the selected portion, and triggering a capture of the time-varying signal based on and in response to the occupancy determination for the selected portion of the bitmap.
3 Citations
47 Claims
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1-23. -23. (canceled)
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24. A method of measuring an occupancy of an input signal comprising:
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accumulating the input signal into a frequency domain bitmap during a measurement period; defining a region of interest of the frequency domain bitmap; and calculating the occupancy of the input signal within the region of interest. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A test and measurement instrument comprising:
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a signal input configured to receive an input signal; and a processor configured to; accumulate the input signal into a frequency domain bitmap during a measurement period; define a region of interest of the frequency domain bitmap; and calculate an occupancy of the input signal within the region of interest. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification