Spectrum analyzer having functions for simultaneously executing

Details Spectrum analyzer having functions for simultaneously executing Spectrum analyzer having functions for simultaneously executing

1989-12-22

1992-06-02

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Analysis of complex waves

324 77B, 324121R, 324612, 340720, G01R 2316

Patent

active

051190184

ABSTRACT:
A frequency conversion section sweeps an object signal within a desired measurement frequency range, thereby frequency-converting the object signal. A peak detector detects a peak of an output from the frequency converting section. A measurement detector measures and detects the output from the frequency conversion section simultaneously with the peak detection by the peak detector. The measurement detector has an output characteristic lower than an output characteristic of the peak detector. A display displays an output from the peak detector and an output from the measurement detector on a single display screen, in synchronism with the sweeping by the frequency conversion section, with these outputs of the peak detector and the measurement detector being plotted along an axis representative of frequencies. In another mode of the invention, an alarm device indicates the fact that an output from the peak detector has exceeded a predetermined allowable limit level.

REFERENCES:
patent: 2570139 (1951-10-01), Maxwell
patent: 4238727 (1980-12-01), Madni
patent: 4272719 (1981-06-01), Niki et al.
patent: 4611164 (1986-09-01), Mitsuyoshi et al.
patent: 4975633 (1990-12-01), Toda et al.
patent: 5025208 (1991-06-01), Danzeisen
IEEE Transactions on Broadcasting, vol. BC-22, No. 4, Dec./1976, pp. 116-123; R. A. Tell et al.: "Broadcast-Signal Bandwidth Measurements Using Real-Time Data Averaging", p. 117, right-hand column, last paragraph to p. 118, left-hand column, paragraph 1; FIGS. 3, 6.
R. Irwin: "Signal Detection and Post-Detection Signal/Display Processing Effects on Spectrum Analyzer Requirements", Apr./1981, pp. 1-30, Hewlett Packard, Signal Analysis Division, pp. 2, 3, 17-19.
New Electronics, vol. 19, No. 8, Apr./1986, pp. 53-56, London, GB, S. J. Gledhill: "Making a Spectrum Analyzer Easier to Use", p. 53, left-hand column, paragraph 2, FIG. 2.

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