| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 03/20/2013 | CN102981051A Digital display type frequency meter |
| 03/20/2013 | CN102981050A Single vibration frequency measuring method |
| 03/20/2013 | CN102981049A Frequency detection method used for microgrid system |
| 03/20/2013 | CN102981048A Optical-sampling-based radio frequency measuring method and measuring device |
| 03/14/2013 | US20130066577 Robust spectral analyzer for one-dimensional and multi-dimensional data analysis |
| 03/14/2013 | US20130063127 Noise reduction system and method |
| 03/13/2013 | CN202794336U Radio astronomical narrow-band signal digital analysis terminal based on undersampling technology |
| 03/13/2013 | CN202794335U CPLD and single chip microcomputer-based high-precision frequency instrument |
| 03/13/2013 | CN202794306U Electric power circuit load measuring and recording apparatus |
| 03/13/2013 | CN102967761A Method for analyzing frequency adaptive signals |
| 03/13/2013 | CN102967760A Signal analysis method at designated frequency |
| 03/13/2013 | CN102967759A Weak signal detection circuit based on chaotic oscillator |
| 03/12/2013 | US8396821 Utility monitoring systems and methods of use |
| 03/12/2013 | US8396227 Method of determining the harmonic and anharmonic portions of a response signal of a device |
| 03/12/2013 | US8395371 Methods for characterizing the behavior of microelectromechanical system devices |
| 03/07/2013 | US20130057303 Device and method for detecting a clasping of a hand-held device by a hand |
| 03/07/2013 | US20130057252 Apparatus and method for determining dielectric access in portable terminal |
| 03/06/2013 | CN202770903U Over current alarm device, power kit, frequency converter and uninterruptible power supply |
| 03/06/2013 | CN102955090A Electric arc fault detection method and circuit system for high-power household appliances |
| 03/06/2013 | CN102955068A Harmonic detection method based on compressive sampling orthogonal matching pursuit |
| 03/06/2013 | CN102955054A Apparatus and method for providing frequency domain display with visual indication of fft window shape |
| 03/06/2013 | CN102116796B eTPU-based synchronous sampling and frequency measuring device for alternating-current signals and working method thereof |
| 03/06/2013 | CN102095930B Method for identifying external automatic signal of preselector-free frequency spectrograph under external mixing mode |
| 03/05/2013 | US8392134 Antenna testing device and antenna testing method using the same |
| 03/05/2013 | US8392133 Method for measuring shear wavespeed in an isotropic plate |
| 03/05/2013 | US8390384 Precision on-board tuning of embedded microcontroller oscillator using charge time measurement unit |
| 03/05/2013 | US8390301 Electro-optic displays, and materials and methods for production thereof |
| 03/05/2013 | US8390268 Noise measurement apparatus and test apparatus |
| 02/28/2013 | WO2013027314A1 Frequency sweep signal generator, frequency component analyzer, wireless device, and frequency sweep signal generating method |
| 02/28/2013 | DE102011052900A1 Method of automatically detecting and classifying high frequency signals in air, involves examining two-dimensional allocation pattern to find for possible indicator wrong assignment, and output electromagnetic emission classification |
| 02/27/2013 | CN202758000U Signal frequency detection system |
| 02/27/2013 | CN202757999U Frequency and phase position detector for AC power supply |
| 02/27/2013 | CN202757998U Atom Zeeman frequency measuring instrument |
| 02/27/2013 | CN102944842A Detecting method for rotor broken bar fault of cage-type asynchronous motor |
| 02/27/2013 | CN102944773A Method for detecting and classifying power disturbances based on space conversion |
| 02/27/2013 | CN102095917B Test method for current noise of high-resistance device and medium material |
| 02/26/2013 | US8386208 Method and apparatus for trigger scanning |
| 02/26/2013 | US8386202 Communication device for household electric appliances and monitoring system using said device |
| 02/26/2013 | US8384440 High resolution capture |
| 02/21/2013 | WO2013023952A1 Method and device for automatically allocating a signal to a measurement application |
| 02/21/2013 | US20130046484 Data processing for hyperpolarized xenon magnetic resonance in the lung |
| 02/21/2013 | DE102011081072A1 Verfahren und Vorrichtung zur automatischen Zuweisung eines Signals zu einer Messanwendung Method and apparatus for automatic assignment of a signal to a measuring application |
| 02/20/2013 | CN202748407U Low-cost single-phase harmonic electric energy meter |
| 02/20/2013 | CN202748404U Wind power grid voltage, current, and harmonic wave detection apparatus based on DSP and ARM |
| 02/20/2013 | CN102937668A Electric system low-frequency oscillation detection method |
| 02/20/2013 | CN102937667A Wireless, intelligent and controllable metering equipment used for socket |
| 02/20/2013 | CN102185601B Keystroke function realizing method and device for hand-held frequency spectrograph |
| 02/19/2013 | US8380453 Method and device for determining the frequency distribution of the signal levels of a measured signal measured in overlapping observation intervals |
| 02/14/2013 | WO2013020905A1 Parallel frequency mask trigger unit and method for the operation thereof |
| 02/14/2013 | US20130038353 System and method for simulating biofidelic signals |
| 02/14/2013 | DE102011080731A1 Method for calculating spectrum of signal, involves digitizing signals and storing individual samples of digitized signal in storage unit, where Fourier transformation for samples is calculated by transformation unit |
| 02/14/2013 | DE102011080730A1 Parallele Frequenzmaskentriggereinheit und Verfahren zu deren Betrieb Parallel frequency mask trigger unit and method of operating the same |
| 02/13/2013 | CN202735407U Active power filter harmonic detection device |
| 02/13/2013 | CN102928665A Intermediate frequency digital spectrum analyzer and method thereof |
| 02/13/2013 | CN102928664A System for realizing full-band scanning of frequency spectrograph through point-by-point phase locking |
| 02/13/2013 | CN102928663A Current harmonic index quantification assessment method of grid-connected photovoltaic power generation system |
| 02/13/2013 | CN102928662A Method and device for measuring signal frequency stability |
| 02/13/2013 | CN102928661A Portable data acquisition equipment for instability detection of motor frequency |
| 02/13/2013 | CN102928638A Frequency spectrograph waterfall plot display system and method |
| 02/12/2013 | US8374814 X-ray detection signal processing apparatus and method therefor |
| 02/12/2013 | US8374812 Signal analyzer and method for producing data therefore |
| 02/06/2013 | CN202721665U Portable sweep-frequency whole section receiver |
| 02/06/2013 | CN202720272U Adaptive frequency measurement circuit |
| 02/06/2013 | CN202720271U Detection circuit of low-pass RC active filer |
| 02/06/2013 | CN102918406A AC electric charge measurement device, and AC electric charge measurement method |
| 02/06/2013 | CN102914695A Harmonic detection method with real-time delay compensation function |
| 02/06/2013 | CN101931219B Phase deviation based auto-disturbance rejection isolated island detecting method |
| 02/05/2013 | US8368382 Frequency characteristics measuring device |
| 01/31/2013 | US20130030743 Method for identifying high-speed frequency response of multirate system and apparatus therefor |
| 01/31/2013 | US20130030742 Method and system for monitoring a synchronous machine |
| 01/30/2013 | CN202710660U SOPC-based frequency characteristic H(jomega) testing device |
| 01/30/2013 | CN202710659U Instantaneous frequency tracking device based on digital signal processor |
| 01/30/2013 | CN202710658U Automatic detection device for active radio frequency tags |
| 01/30/2013 | CN102901871A Signal frequency detection system and method |
| 01/30/2013 | CN102901870A Frequency testing system based on singlechip and testing method using same |
| 01/30/2013 | CN102055699B Demodulation method for frequency shift keying and device for realizing same |
| 01/24/2013 | WO2013012517A1 Radar pulse detection using a digital radar receiver |
| 01/24/2013 | WO2013010202A1 Apparatus and method for detecting at least one periodically occurring defect on an object |
| 01/24/2013 | US20130024150 Signal processing in guided wave cutoff spectroscopy |
| 01/23/2013 | EP2548306A2 Frequency measuring and control apparatus with integrated parallel synchronized oscillators |
| 01/23/2013 | CN202696554U Filter with frequency testing function |
| 01/23/2013 | CN202693682U Pointer type ampere meter frequency tester |
| 01/23/2013 | CN202693670U Digital readout network instrument |
| 01/23/2013 | CN102890193A Multi-cycle sampling frequency compensation method |
| 01/23/2013 | CN102890192A Method for realizing scanning of frequency spectrograph under different scanning widths by using multi-local oscillator combination |
| 01/23/2013 | CN102890179A Harmonic current test system with novel current converter |
| 01/17/2013 | US20130018616 Frequency counter |
| 01/16/2013 | EP2546990A1 Method and system for calibrating frequency |
| 01/16/2013 | EP2546663A1 Method and system for measuring frequency |
| 01/16/2013 | EP2546662A1 Frequency counter |
| 01/16/2013 | CN102879644A System for realizing resolution bandwidth of spectrum analyzer by utilizing pre-switching of analog bandwidth |
| 01/16/2013 | CN102879643A Novel spectrum analyzer and method |
| 01/16/2013 | CN102879642A Frequency estimation method for sine signal |
| 01/16/2013 | CN102879641A Method and system for measuring frequency |
| 01/16/2013 | CN102879640A Electromagnetic coupling resonance coil parameter measurement system |
| 01/16/2013 | CN102879639A Real-time frequency measuring method in power system |
| 01/15/2013 | US8355884 Signal quality measurement device, spectrum measurement circuit, and program |
| 01/15/2013 | CA2651302C Fractional sampling of electrical energy |
| 01/10/2013 | US20130012148 Accurate transmit power measurement |
| 01/09/2013 | EP2543127A1 Dynamic synchronization system |