Patent
Waveform analyzer having function of simultaneously displaying wide- and narrow-band spectra or transmission characteristics
TLDR
In this article, a zone marker is used to indicate the position or width of the zone marker in accordance with the movement of the center frequency or band width of a displayed narrow-band spectrum.Abstract:
Display section (2) displays, on a screen, a zone marker for indicating, on a wide-band spectrum display area, that part of a wide-band spectrum which corresponds to a selected narrow-band spectrum to be displayed, and the wide-band spectrum, as well as said narrow-band spectrum which has been enlarged. First setting section (14) changes a center frequency or a band width of said displayed narrow-band spectrum, in accordance with the change of the position or width of the zone marker. Second setting section (15) cooperating with the first setting section (14) changes the position or width of the zone marker in accordance with the movement of the center frequency or band width of the displayed narrow-band spectrum. Control section (7h) for controlling a measurement resolution and a sweep time in accordance with the magnitude of the displayed spectrum, so as to satisfy the formula: sweep time ≧ band width/(measurement resolution)².K where K = a constant.read more
Citations
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Patent
Waveform display apparatus for easily realizing high-definition waveform observation
Takehiko Kawauchi,Yoshifumi Imazu,Katsuhiko Kamiyama,Mitsuyoshi Takano,Katsuhisa Iiyoshi,Takahiro Wada,Aiichi Katayama +6 more
TL;DR: In this article, a measurement unit U100 measures an input signal to be measured by sweeping frequencies in a measurement range having a predetermined frequency band so as to obtain waveform data to be developed on the frequency axis such as spectrum data in, e.g., a spectrum analyzer.
Patent
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Patent
Waveform display apparatus of frequency sweep type for facilitating display of a high definition waveform
TL;DR: In this paper, a measurement unit U100 measures an input signal to be measured by sweeping frequencies in a measurement range having a predetermined frequency band so as to obtain waveform data to be developed on the frequency axis such as spectrum data in, e.g., a spectrum analyzer.
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TL;DR: In this article, a system and method for controlling the presentation of information on a display device concerning a collection of objects is presented, where a processor receives user inputs defining one or more user-adjustable filters.
Patent
Measuring method by spectrum analyzer
Takayoshi Fukui,Kouichi Yamashita,Takahiro Yamaguchi,Osamu Aoyama,Takashi Kosuge,Yoshiaki Miyamae,Toshiharu Kasahara,Hiroaki Takaoku +7 more
TL;DR: In this article, a spectrum analyzer in which automatic setting of parameters such as band width is done by the analyzer without manual operator input and noise measurements are determined and displayed to the operator.
References
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Patent
Signal analyzer apparatus with automatic frequency measuring function
TL;DR: In this paper, a sweep signal generator controls the local oscillator in an analog manner such that frequency measurement can be performed within a desired measuring frequency range, and a peak search section outputs a frequency valve corresponding to the maximum value of the data in the memory.
Patent
Method and apparatus for selecting and displaying a high resolution window from a main display
TL;DR: In this article, a windowed portion of a displayed waveform under test, typically from an oscilloscope display, is simultaneously displayed at a higher resolution by using a software program in conjunction with the existing timebase circuit rather than using a second time base circuit.
Patent
Spectrum analyzer with frequency band selection
TL;DR: A spectrum analyzer for FFT analyzing and displaying the frequency spectrum of a digital signal over a given frequency band (background) as well as over a more limited frequency band(foreground) is described in this paper.
Patent
Video processor for a spectrum analyzer
TL;DR: In this paper, an input signal is mixed with sampling signals from oscillators which vary the frequency of the sampling signal from a first frequency to a second frequency The resulting Intermediate Frequency (IF) signal is processed and digital values are stored in a memory in response to the input signal.
Patent
Signal analyzer apparatus with analog partial sweep function
Mitsuyoshi Takano,Seiryo Fukaya +1 more
TL;DR: In this paper, the analog sweep signal generator receives first or second sweep measurement frequency range setting data from a sweep range setting unit and supplies the data to the local oscillator as the analog signal for an entire or partial sweep operation.