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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TL;DR: In this paper, the reflectivity of the (002) reflection for incident neutron energies from 4.5 to 40.0 meV has been investigated and it is shown that pyrolytic graphite can be used as a monochromator and/or analyzer crystal in a triple-axis spectrometer.
42 citations
TL;DR: It is shown how fast (50–100 kHz) piezoelastic modulation of the full Stokes vector can be used in combination with large CCD-type detector arrays with long integration times.
Abstract: It is shown how fast (50–100 kHz) piezoelastic modulation of the full Stokes vector can be used in combination with large CCD-type detector arrays with long integration times. The technique is to use an optical demodulation system (replacing the lockin amplifiers in corresponding single-channel detector systems). This allows the CCD detectors to be used with integration times and readout rates as in ordinary photometry. Including an optical phase switch in the system, the effect of the large pixel-to-pixel sensitivity variations can be removed from the recorded polarization images. The beam splitter that suppresses atmospheric noise can be located immediately before the detectors instead of being part of the polarization analyzer.
42 citations
TL;DR: In this paper, the spectral-hole-burning-based instantaneous spectral analysis of optically carried broadband radio frequency signals has been reported, which aims at becoming the next generation spectrum analyzer for broadband radar and astronomical applications.
42 citations
TL;DR: A 256-channel pulse-height analyzer using a magnetic core memory is used at the Argonne National Laboratory as discussed by the authors, which uses a form of the Wilkinson method of generating numbers in response to input pulses, and correspond to the channel numbers into which the individual counts are to be recorded.
Abstract: A 256‐channel pulse‐height analyzer using a magnetic core memory is now in use at the Argonne National Laboratory. This analyzer uses a form of the Wilkinson method of generating numbers in response to input pulses. These numbers are proportional to the amplitudes of the input pulses, and correspond to the channel numbers into which the individual counts are to be recorded. The digital data processing circuits comprise a simple computer, with an internal memory which can store 256 sixteen digit binary numbers. A cathode‐ray tube display of the data in the form of a plot of counts versus channel number is available during and after operation. Permanent readout is in the form of a similar curve traced by a recording potentiometer. Printed decimal readout is also available. The normal average analyzer dead time is 80 μsec, and pulse rates in excess of 5 million per minute at the input circuit can be tolerated without appreciable data distortion.
42 citations
Patent•
02 Jul 1998
TL;DR: In this article, the burst analyzer includes a filter that compares the received signal, for each reference segment thereof, with each reference signal offset by one of a plurality of time offsets to generate correlation data and then determines the time offset at which a sum of the maximum correlation values, over the plurality of reference segments, is a maximum.
Abstract: A burst analyzer is useful in a digital communication system in which a signal burst has a plurality of reference segments distributed within the signal burst for transmission of a plurality of reference signals. The burst analyzer includes a filter that compares the received signal, for each reference segment thereof, with each reference signal offset by one of a plurality of time offsets to generate correlation data. The burst analyzer then determines, for each reference segment of the signal burst, a maximum correlation value from the correlation data for each time offset. Then the burst analyzer determines the time offset at which a sum of the maximum correlation values, over the plurality of reference segments, is a maximum. The burst analyzer jointly generates a frequency domain representation of the correlation data associated with the time offset at which the maximum correlation sum is a maximum, and then determines a frequency at which the frequency domain representation is a maximum.
42 citations