Topic
Spectrum analyzer
About: Spectrum analyzer is a research topic. Over the lifetime, 12217 publications have been published within this topic receiving 101851 citations.
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30 citations
TL;DR: This paper discusses the problem of correcting the effects of harmonic interference on fast Fourier transform results and proposes and implements a procedure to evaluate and correct these effects on an intelligent FFT analyzer, which is also capable of indicating result uncertainties.
Abstract: This paper discusses the problem of correcting the effects of harmonic interference on fast Fourier transform (FFT) results. A procedure to evaluate and correct these effects is proposed and implemented on an intelligent FFT analyzer, which is also capable of indicating result uncertainties.
29 citations
Patent•
20 Oct 2005
TL;DR: A near-infrared spectrometer-based analyzer attaches continuously or semi-continuously to a human subject and is used to collect spectral measurements of a tissue sample as discussed by the authors.
Abstract: A near-infrared spectrometer-based analyzer attaches continuously or semicontinuously to a human subject and is used to collect spectral measurements of a tissue sample. The spectral readings are used to estimate a biological parameter in the sampled tissue noninvasively, such as glucose concentration. The preferred apparatus is a near-infrared analyzer that includes a base module and a sample module connected together with a communication bundle. The base module contains the bulk of the analyzer, such as a spectrograph and a central processing unit with an algorithm used for converting the optical signal into a glucose concentration. The sample module is typically in a smaller module that interfaces to a tissue sample. The sample module is preferably handheld and provides minimal sampling distortion due to heat or pressure.
29 citations
Patent•
29 May 2003TL;DR: In this article, an apparatus consisting of an input circuit, a content analyzer, a storage circuit and an output circuit is configured to generate a first intermediate signal from a plurality of input video signals.
Abstract: An apparatus comprising an input circuit, a content analyzer, a storage circuit and an output circuit. The input circuit may be configured to generate a first intermediate signal from a plurality of input video signals. The content analyzer circuit may be configured to present one or more flags in response to the intermediate signal. The storage circuit may be configured to (i) store and organize the first intermediate signal into a plurality of sequences each related to one of the input video signals and (ii) generate a second intermediate signal from the sequences. The output circuit may be configured to generate an output video signal in response to the second intermediate signal. The output circuit may be configured to embed tracking information into the output video signal in response to the one or more flags.
29 citations
Patent•
20 Apr 1982TL;DR: A sensor for a spectral analyzer includes a relatively movable holder and probe, where the probe is fitted with a reflector, and the holder is provided with a pair of adjacent optical fibers for transmitting/receiving light as discussed by the authors.
Abstract: A sensor for a spectral analyzer includes a relatively movable holder and probe, where the probe is fitted with a reflector, and the holder is provided with a pair of adjacent optical fibers for transmitting/receiving light. When the probe abuts the surface of the object to be measured, the probe and holder move relatively so that the fiber pair approach the reflector. A switch activating the analyzer for data collection is operated in response to the change in reflected light intensity caused by the relative movement.
29 citations