Alias detection when displaying FFTS
First Claim
Patent Images
1. A method, comprising:
- acquiring a signal under test (SUT) at each of at least two sample rates to provide thereby respective streams of samples;
processing the respective streams of samples according to a first function to determine thereby respective spectral energy distributions; and
comparing the respective spectral energy distributions to determine a spectral region including spectral energy common to each.
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Abstract
For alias detection in the frequency domain a method is provided of acquiring a signal under test (SUT) at each of a first sample rate and a second sample rate to provide thereby respective first and second streams of samples, processing the first and second streams of samples according to a first function to determine thereby respective spectral energy distributions, and comparing the spectral energy distributions to determine thereby a spectral region including spectral energy common to each of the spectral energy distributions.
10 Citations
19 Claims
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1. A method, comprising:
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acquiring a signal under test (SUT) at each of at least two sample rates to provide thereby respective streams of samples;
processing the respective streams of samples according to a first function to determine thereby respective spectral energy distributions; and
comparing the respective spectral energy distributions to determine a spectral region including spectral energy common to each. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus comprising:
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an input channel for acquiring a signal under test (SUT) at a plurality of sample rates to provide thereby respective streams of samples; and
a processor for processing the respective streams of samples according to a first function to determine thereby respective spectral energy distributions, and for comparing the spectral energy distributions to determine thereby a spectral region including spectral energy common to each of the respective spectral energy distributions. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification