| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 05/04/2005 | CN1613035A Pulse output function for programmable logic controller |
| 05/04/2005 | CN1611953A Method for measuring factory harmonic wave and measuring instrument |
| 05/03/2005 | US6888342 Spectrum analyzer and vector network analyzer combined into a single handheld unit |
| 04/28/2005 | US20050089120 FSK demodulator system and method |
| 04/27/2005 | CN1199416C Frequency error detecting device and frequency error detecting method |
| 04/21/2005 | US20050086015 Apparatus and method for detecting and analyzing spectral components in predetermined frequency bands within a signal, frequency filter, and related computer-readable media |
| 04/21/2005 | DE10033575B4 Verfahren und Vorrichtung zur Abschätzung der Frequenz eines digitalen Signals Method and apparatus for estimating the frequency of a digital signal |
| 04/19/2005 | US6882947 Discrete fourier transform (DFT) leakage removal |
| 04/19/2005 | US6882946 Spectral analysis measurement apparatus and method of measuring for spectral analysis measurement apparatus |
| 04/19/2005 | US6882832 Frequency verification of an amplitude modulated signal |
| 04/14/2005 | US20050080576 Method and system for frequency domain time correlation |
| 04/14/2005 | US20050080574 Method and apparatus for decomposing signal jitter using multiple acquisitions |
| 04/14/2005 | US20050077889 Method to determine the presence of multi-carrier signals |
| 04/13/2005 | CN1196936C Detecting analytic system |
| 04/12/2005 | US6879187 Signal detect circuit for high speed data receivers |
| 04/07/2005 | WO2005031377A1 Method for determining the frequency response of an electrooptical component |
| 04/07/2005 | US20050075812 Systems and methods for performing analysis of a multi-tone signal |
| 04/07/2005 | US20050073316 Circuit for measurement of electrical pollution on power line |
| 04/06/2005 | CN1603845A Detection method for resonance frequency of resonant type piezoelectric microsensor |
| 03/31/2005 | US20050071132 Digital measurements of spread spectrum clocking |
| 03/29/2005 | US6873923 Systems and methods for performing analysis of a multi-tone signal |
| 03/24/2005 | US20050065788 Hybrid speech coding and system |
| 03/24/2005 | US20050065787 Hybrid speech coding and system |
| 03/24/2005 | US20050065786 Hybrid speech coding and system |
| 03/24/2005 | US20050065782 Hybrid speech coding and system |
| 03/17/2005 | WO2004109527B1 A network analyzing method and a network analyzing apparatus |
| 03/17/2005 | US20050060113 Signal detection |
| 03/17/2005 | US20050057253 Digital phosphor spectrum analyzer |
| 03/17/2005 | US20050057241 Band distribution inspecting device and band distribution inspecting method |
| 03/16/2005 | CN2685888Y Simple frequency tester |
| 03/16/2005 | CN1595180A Frequency self-tracing dimension-variation stochastic resonance fault diagnosis system |
| 03/16/2005 | CN1595179A Cascade double stabilization system for information detection |
| 03/15/2005 | US6867599 Load-pulled measurement with reference circuit |
| 03/09/2005 | CN1192239C Analysing signals |
| 03/09/2005 | CN1192238C Tester for measuring frequency of quartz oscillator |
| 03/08/2005 | US6865425 State machine for a pulse output function |
| 03/03/2005 | WO2005019841A2 Signal-processing method which is used to calculate sub-sampled signal spectra |
| 03/03/2005 | US20050046409 Systems and methods for performing RF power measurements |
| 03/01/2005 | US6861846 Distortion measurements with a vector network analyzer |
| 03/01/2005 | US6861833 Frequency conversion sweep measuring method |
| 02/22/2005 | US6859026 Method and device for verifying frequency of clock signal |
| 02/17/2005 | WO2005015248A1 Digital data signal testing using arbitrary test signal |
| 02/17/2005 | US20050038942 Data converter with statistical domain output |
| 02/16/2005 | CN1582396A High frequency detection method and high frequency detection circuit |
| 02/16/2005 | CN1581629A Comprehesive power filter harmonic current predicting method based on weighted first order local thereory |
| 02/16/2005 | CN1580791A Harmonic detecting method based on adaptive neuronal on-line setting |
| 02/10/2005 | WO2005012927A1 Dual signal rf power level detector |
| 02/09/2005 | CN1188944C Apparatus for tracking resonant frequency |
| 02/02/2005 | EP1502128A2 Method for assigning a pulse response to one of a plurality of pulse types with different decay times and device for carrying out said method |
| 02/02/2005 | CN2676210Y Driver and signal collector for resonant transducer |
| 01/27/2005 | US20050021580 Time domain data converter with output frequency domain conversion |
| 01/27/2005 | US20050021266 Absolutely and uniformly convergent iterative approach to inverse scattering with an infinite radius of convergence |
| 01/27/2005 | US20050021261 Wideband signal analyzer |
| 01/26/2005 | EP1499902A1 Method and device for measuring intermodulation distortion |
| 01/26/2005 | CN1571613A Method and apparatus for determining the resonant frequency of a resonant circuit |
| 01/20/2005 | WO2005006250A1 Apparatus and method for detecting and analyzing spectral components |
| 01/20/2005 | WO2005005999A1 Improved frequency determination |
| 01/20/2005 | DE10329396A1 Hochfrequenz-Messsystem mit räumlich getrennten Hochfrequenzmodulen High-frequency measurement system with spatially separated high-frequency modules |
| 01/19/2005 | EP1393084B1 Device for measuring frequency |
| 01/13/2005 | US20050005438 Method of testing printed circuit board opening spacings |
| 01/12/2005 | CN2670952Y Pulse perodic measuring circuit |
| 01/11/2005 | US6841990 Mechanical interface for rapid replacement of RF fixture components |
| 01/06/2005 | WO2005001491A1 High-frequency measuring system having spatially separated high-frequency modules |
| 01/06/2005 | US20050002449 Signal observation system |
| 01/06/2005 | US20050001608 Phase shift circuit application for DVD ROM chipset in HTOL board design |
| 01/05/2005 | EP1305644B1 Method and measuring device for measuring the spectra in adjacent channels |
| 01/05/2005 | CN1183388C Method and equipment for sampling electric input signal with wide frequency band |
| 12/30/2004 | US20040263267 Detection circuit and method for an oscillator |
| 12/30/2004 | US20040263224 Method for producing a control signal which indicates a frequency error |
| 12/29/2004 | CN1182402C Homosequence specific phase frequency measurement method and high accuracy frequency meter |
| 12/23/2004 | US20040257062 Method of setting grids and/or markers in measuring apparatus |
| 12/22/2004 | CN2665720Y Hand-held pincerlike digital current harmonic analyzer |
| 12/21/2004 | US6834093 Frequency comparator circuit |
| 12/16/2004 | WO2004109527A1 A network analyzing method and a network analyzing apparatus |
| 12/16/2004 | US20040253921 Transducer package for process control |
| 12/16/2004 | US20040251888 Method and apparatus for zero-mixing spectrum analysis |
| 12/16/2004 | DE10325147A1 Signal analysis method for time frequency analysis of signal sequences uses atoms in a dictionary in trials for a signal sequence |
| 12/14/2004 | US6832172 Apparatus and method for spectrum analysis-based serial data jitter measurement |
| 12/07/2004 | US6828839 Clock period sensing circuit |
| 12/02/2004 | WO2004104603A1 Phase measurement device, method, program, and recording medium |
| 12/02/2004 | US20040243329 Frequency measuring device |
| 12/02/2004 | US20040239354 Startup/yank circuit for self-biased phase-locked loops |
| 12/01/2004 | CN1178393C Method for deriving and calibrating frequency of pulse signal |
| 11/25/2004 | WO2004102214A1 Signal measuring device |
| 11/25/2004 | WO2004102213A1 Signal measurement/display device and method |
| 11/25/2004 | DE10319899A1 Frequency deviation unlocked signal generation procedure uses counters to create pulse signal with length proportional to deviation and detect threshold transgression |
| 11/24/2004 | CN1549930A Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 11/11/2004 | DE10311545A1 Signal spectrum analysis method in which a signal is broken up into multiple sequential sections that are then weighted according to their signal parameters before being combined to form an instantaneous frequency spectrum |
| 11/10/2004 | EP1474696A1 METHOD AND APPARATUS FOR ZERO−MIXING SPECTRUM ANALYSIS |
| 11/10/2004 | CN1545786A Monitoring upstream frequency band |
| 11/04/2004 | WO2003060557A3 Method for assigning a pulse response to one of a plurality of pulse types with different decay times and device for carrying out said method |
| 11/04/2004 | DE10297381T5 Vorrichtung und Verfahren zur Taktschrägemessung Apparatus and method for Taktschrägemessung |
| 10/28/2004 | US20040212400 High-frequency detection method and high-frequency detection circuit |
| 10/27/2004 | EP1004031A4 Electric arc monitoring systems |
| 10/20/2004 | EP1468297A2 A hybrid optical target correlator/digital processor |
| 10/19/2004 | US6806746 Direct frequency synthesizer for offset loop synthesizer |
| 10/14/2004 | WO2004088454A2 Waveform classification and characterization using multidimensional higher-order statistics |
| 10/14/2004 | CA2520418A1 System and method for waveform classification and characterization using multidimensional higher-order statistics |
| 10/13/2004 | CN1171386C Method for detecting digital phase-locked loop frequency |
| 10/13/2004 | CN1171090C Clock signal frequency verifying device and method |