| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 03/05/2014 | CN103616563A Open type spectrometer receiving channel extension system |
| 03/04/2014 | US8666689 Phase noise analysis of oscillator circuit designs |
| 03/04/2014 | US8664933 Frequency measuring apparatus |
| 02/27/2014 | DE102013213914A1 Mehrstufiges Auslösesystem zum Ausgeben komplexer Auslösesignale Multi-level trigger system for outputting complex trigger signals |
| 02/26/2014 | CN203455407U Electrical network frequency measuring circuit |
| 02/26/2014 | CN103607215A Device and method for achieving spread spectrum function of spectrum analyzer |
| 02/26/2014 | CN103606950A Island detection method of distributed wind-power converter |
| 02/26/2014 | CN103604990A Power harmonic wave detection and analysis equipment |
| 02/26/2014 | CN103604989A Harmonic wave analysis method of power-quality harmonic wave analyzer |
| 02/26/2014 | CN102262187B Device and method for testing and compensating frequency characteristics of power sensor |
| 02/25/2014 | US8660848 Methods and systems for detection from and analysis of physical signals |
| 02/20/2014 | WO2014027423A1 Electric quantity measuring device and electric quantity measuring method |
| 02/20/2014 | US20140052399 Frequency determination circuit and method |
| 02/20/2014 | US20140049267 Non-intrusive passive intermodulation testing |
| 02/20/2014 | DE10219340B4 Verfahren und Einrichtung zum Messen von Intermodulationsverzerrungen Method and apparatus for measuring intermodulation distortion |
| 02/19/2014 | CN103592514A Novel harmonic high-precision detection method |
| 02/19/2014 | CN103592513A Power signal harmonic analysis method and device |
| 02/19/2014 | CN103592512A Harmonic analysis method of power quality harmonic analyzer |
| 02/19/2014 | CN103592511A Circuit for detecting alternating current power supply frequency |
| 02/19/2014 | CN103592510A Microwave frequency calibrator and calibration method thereof |
| 02/19/2014 | CN103592509A Active probe used for measuring KHz grade clock |
| 02/19/2014 | CN103592500A Power grid synchronous signal real-time detection method and system based on reference frequency |
| 02/19/2014 | CN103590431A Intelligent axial force instrument capable of being recycled |
| 02/19/2014 | CN102590668B Method and device for detecting microwave signal types and frequency based on photon technology |
| 02/19/2014 | CN102519579B Detection method of turbine collision and abrasion faults |
| 02/18/2014 | US8655615 Absolute high resolution segment or revolution counter |
| 02/18/2014 | US8653808 Method for frequency detection and detecting variation of frequency |
| 02/13/2014 | WO2014023678A1 Improved selectivity test |
| 02/13/2014 | US20140041454 Piezoelectric resonator, etching amount detecting device, and oscillator |
| 02/12/2014 | CN103576120A Calibration and self-healing algorithm for third-harmonic component quasi-synchronous information transmission |
| 02/12/2014 | CN103575993A Sampled data processing method combining PMU dynamic data processing |
| 02/12/2014 | CN103575987A Inter-harmonic wave detection instrument based on DSP and detection method thereof |
| 02/12/2014 | CN103575986A Microwave integrated device of radio frequency front end low waveband circuit of spectrum analyzer |
| 02/12/2014 | CN103575985A System for improving probability of transient event detection |
| 02/12/2014 | CN103575984A Harmonic analysis method based on Kaiser window double-spectral-line interpolation FFT |
| 02/12/2014 | CN103575983A 测量系统 Measurement System |
| 02/12/2014 | CN103575982A Method for real-time analysis of frequency stability |
| 02/12/2014 | CN103575981A Method for accurately measuring alternating current frequency |
| 02/12/2014 | CN103575980A System frequency measurement method and synchronous phasor measurement method and device |
| 02/12/2014 | CN103575979A Method for digital measuring of alternating current frequency |
| 02/12/2014 | CN103575955A Electric power information obtaining method |
| 02/12/2014 | CN102565529B Low-power-consumption clock frequency detection circuit |
| 02/12/2014 | CN102323479B Train harmonic current analysis method |
| 02/11/2014 | US8649989 Time-domain triggering in a test and measurement instrument |
| 02/11/2014 | US8648622 Method and device for monitoring a frequency signal |
| 02/06/2014 | US20140035560 Method and apparatus for limiting access to an integrated circuit (ic) |
| 02/06/2014 | US20140035362 System and Method for Power Supply Testing |
| 02/05/2014 | CN103562735A System and method for detecting fundamental frequency of electric power system |
| 02/05/2014 | CN103559110A Testing method and device of LVDS (low voltage differential signaling) interface of SOC (system on chip) |
| 02/05/2014 | CN103558454A Measurement method for pulse input frequency |
| 02/05/2014 | CN102721465B System and method for diagnosing and preliminarily positioning loosening faults of iron core of power transformer |
| 02/04/2014 | US8643359 Method and apparatus to measure differential phase and frequency modulation distortions for audio equipment |
| 01/30/2014 | US20140028284 Method for obtaining electric power information |
| 01/30/2014 | US20140028283 Method of extracting zero crossing data from full spectrum signals |
| 01/29/2014 | CN103543359A Method for achieving self-defining test function sequence in a microwave measurement apparatus |
| 01/29/2014 | CN103543332A Power harmonic prediction method and device |
| 01/29/2014 | CN103543331A Method for calculating harmonics and inter-harmonics of electric signal |
| 01/28/2014 | US8639462 Method and system for determining the time-of-flight of a signal |
| 01/28/2014 | CA2676893C Independent frequency measurement and tracking |
| 01/23/2014 | WO2014012179A1 Frequency determination circuit and method |
| 01/22/2014 | CN203405511U Simple frequency meter based on an AVR single-chip microcomputer |
| 01/22/2014 | CN103529296A Device and method for measuring phase spectrum of comb-shaped spectrum generator |
| 01/22/2014 | CN103529295A Sampling frequency determination method for calculating harmonic amplitude on basis of filtering and sampling |
| 01/22/2014 | CN103529294A HHT (Hilbert-Huang Transform)-based harmonic detection system and method for grid-connected inverter of photovoltaic system |
| 01/22/2014 | CN103529293A Method for measuring parallel frequency and periodic signal parameters based on edge effect |
| 01/22/2014 | CN103529292A Digital frequency meter system based on CPLD (complex programmable logic device) and 51 single chip microcomputer |
| 01/22/2014 | CN103529291A Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 01/15/2014 | CN203396916U Generator rotating rectifier detection device |
| 01/15/2014 | CN203396841U Phase locking apparatus of a variable-ratio water-drawing energy-storage set control system |
| 01/15/2014 | CN103513103A Physical quantity measuring apparatus and physical quantity measuring method |
| 01/15/2014 | CN103513102A Detecting method based on multi-frequency stimulation Duffing chaotic oscillator weak signal detection system |
| 01/15/2014 | CN102495283B Self-adaptive equal-precision frequency measuring method |
| 01/14/2014 | US8630818 Method and device for the determination of a statistical measurement value |
| 01/14/2014 | US8629671 Method and device for calibrating a passive intermodulation (PIM) measuring instrument |
| 01/09/2014 | WO2014006961A1 Fading doppler frequency estimation device and fading doppler frequency estimation method |
| 01/09/2014 | US20140012526 Logical triggering in the frequency domain |
| 01/09/2014 | US20140009140 System for testing real time clock |
| 01/08/2014 | CN203385788U A dynamic frequency measurement frequency meter |
| 01/08/2014 | CN103502823A Measuring device and method for measuring a signal having several partial signals |
| 01/08/2014 | CN103502822A Method and measuring device for suppressing interfering signals |
| 01/08/2014 | CN103499741A Obtaining method of resampling high signal-to-noise ratio spectrum of power temperature measuring equipment based on internet of things |
| 01/08/2014 | CN103499740A Online detection device for power grid harmonic waves |
| 01/08/2014 | CN103499739A Frequency measurement method based on FPGA |
| 01/08/2014 | CN103499738A Experimental digital frequency meter |
| 01/08/2014 | CN102435848B Comparison device for verifying capacity of phase noise in Ka wave band |
| 01/08/2014 | CN102401856B Real-time frequency measuring method for power frequency voltage signal based on fuzzy clustering method |
| 01/08/2014 | CN102236069B Test system and test method |
| 01/07/2014 | US8624602 Method and apparatus to measure differential phase and frequency modulation distortions for audio equipment |
| 01/07/2014 | US8624582 Measuring method, arrangement and software product |
| 01/03/2014 | WO2014005016A1 System for maintaining accurate ideal clock time |
| 01/02/2014 | US20140002056 Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 01/02/2014 | DE102013208810A1 Passive Intermodulationsmessvorrichtung Passive intermodulation measurement device |
| 01/01/2014 | EP2680016A2 Systems and methods for measuring the frequency of signals generated by high frequency medical devices |
| 01/01/2014 | CN203376400U Harmonic wave time-frequency characteristic parameter analyzer |
| 01/01/2014 | CN103490417A SHAPF harmonic detection and control system and method based on small waves and FFT |
| 01/01/2014 | CN103487653A Device and method for processing real-time frequency spectrum tracks |
| 01/01/2014 | CN103487652A Frequency self-adaptive real-time fractional harmonic wave detection method |
| 01/01/2014 | CN103487651A Sampled data processing method of APF controller based on FPGA and DSP |
| 01/01/2014 | CN103487650A Frequency measurement device of hydroelectric generating set |
| 01/01/2014 | CN103487649A Method and device capable of measuring both frequency of continuous waves and frequency of pulse modulation carrier waves |