| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 03/06/2003 | WO2003019891A1 Monitoring upstream frequency band |
| 03/06/2003 | CA2457045A1 Monitoring upstream frequency band |
| 03/04/2003 | US6529923 Method for improving the accuracy in the determination of a waveform center of a waveform signal |
| 03/04/2003 | US6529844 Vector network measurement system |
| 03/04/2003 | US6529842 Process and machine for signal waveform analysis |
| 03/04/2003 | US6529012 Arrangement for determining the complex transmission function of a measuring device |
| 02/27/2003 | WO2003016928A1 Method and device for determining sideband ratio of superconduction mixer using comb generator |
| 02/27/2003 | WO2003016927A1 Method and device for determining the spectral progression of electromagnetic signals inside a given frequency range |
| 02/27/2003 | WO2002042733A3 Method for analyzing mass spectra |
| 02/27/2003 | US20030040876 Estimating a plurality of tones in an input signal |
| 02/27/2003 | US20030040875 System and method for estimating one or more tones in an input signal |
| 02/27/2003 | US20030039319 Monitoring upstream frequency band |
| 02/27/2003 | US20030038643 Analog method and circuit for monitoring digital events performance |
| 02/26/2003 | EP1286258A1 Phase to sine amplitude conversion system and method |
| 02/26/2003 | CN1399136A Clock signal frequency verifying device and method |
| 02/20/2003 | US20030036872 Data acquisition instrument architecture with flexible data acquisition, processing and display |
| 02/18/2003 | US6522121 Broadband design of a probe analysis system |
| 02/17/2003 | CA2398153A1 Phase to sine amplitude conversion system and method |
| 02/13/2003 | US20030031241 Phase-noise measurement with compensation for phase noise contributed by spectrum analyzer |
| 02/11/2003 | US6519541 Multiple frequency signal detector |
| 02/11/2003 | US6519537 Apparatus providing on-line indication of frequency of an AC electric power system |
| 02/11/2003 | US6518774 Method and apparatus for testing frequency-dependent electrical circuits |
| 02/11/2003 | US6518742 System and method for analyzing forced and unforced oscillators |
| 01/30/2003 | WO2002048719A3 Method and apparatus for accurate measurement of communications signals |
| 01/29/2003 | EP0958716B1 Method for determining the resonance frequency of an electric resonant circuit |
| 01/28/2003 | US6512788 RF output spectrum measurement analyzer and method |
| 01/23/2003 | US20030016003 Method of measuring frequency of AC power |
| 01/22/2003 | CN1392697A Serial shaking measuring device and method based on frequency spectrum analysis |
| 01/21/2003 | US6509866 Fast chirp transform |
| 01/21/2003 | US6509729 Multiple simultaneous optical frequency measurement |
| 01/21/2003 | US6509728 Spectrum analyzer having function of displaying amplitude probability distribution effectively |
| 01/16/2003 | WO2003005524A1 System for estimating the frequency of the power signal on a power transmission line |
| 01/16/2003 | US20030014203 Low leakage technique for determining power spectra of non-coherently sampled data |
| 01/16/2003 | US20030011352 System for estimating the frequency of the power signal on a power transmission line |
| 01/14/2003 | US6507624 Bandpass sampling architecture for wide-frequency band signal analysis |
| 01/09/2003 | WO2003003031A1 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 01/09/2003 | WO2003003030A1 Low leakage technique for determining power spectra of non-coherently sampled data |
| 01/07/2003 | US6504354 Signal analysis apparatus having YTO yttrium-iron garnet tuned oscillator |
| 01/03/2003 | WO2003001221A1 Distortion detector |
| 01/02/2003 | US20030004665 Method of estimating signal frequency |
| 01/02/2003 | US20030004664 Apparatus and method for spectrum analysis-based serial data jitter measurement |
| 01/02/2003 | US20030001747 Electrical utility meter having harmonic data templates for power quality alarm thresholds |
| 01/02/2003 | EP1271160A1 Method and apparatus for measuring a signal spectrum |
| 01/01/2003 | CN2529263Y 数字式谐波电压因数测试仪 Digital harmonic voltage factor tester |
| 01/01/2003 | CN1388380A Commercial power frequency monitoring method and device |
| 12/31/2002 | US6501258 Optical spatial frequency measurement |
| 12/19/2002 | US20020191686 Method and apparatus for measuring a signal spectrum |
| 12/18/2002 | EP1267172A2 Apparatus and method for spectrum analysis-based serial data jitter measurement |
| 12/18/2002 | CN1385712A Phase information recoverable sweep frequency source method |
| 12/18/2002 | CN1385706A Multi-channel high-accuracy voltage and ringing current tester |
| 12/17/2002 | US6496134 Frequency spectrum method and frequency spectrum analyzer |
| 12/17/2002 | US6495998 Selectable band-pass filtering apparatus and method |
| 12/12/2002 | WO2002099443A2 Device for measuring frequency |
| 12/12/2002 | US20020188423 System for surveillance of spectral signals |
| 12/12/2002 | DE10127428A1 Frequency measurement device has a counter circuit, flip-flop and control unit to enable frequency measurement by determining the number of pulses within a given time interval |
| 12/11/2002 | EP1192810B1 Device and method for determining tone ringing frequency |
| 12/05/2002 | WO2002097448A1 Method for determining the frequency of the current ripple in the armature current of a commutated d.c motor |
| 12/05/2002 | DE10126168A1 Verfahren zum Bestimmen der Frequenz der im Ankerstromsignal eines kommutierten Gleichstrommotors enthaltenen Stromrippel A method for determining the frequency of the current ripples contained in the armature current signal of a commutated direct current motor |
| 12/04/2002 | CN1382995A Digital measuring method of frequency and phase |
| 11/28/2002 | US20020177995 Method and arrangement for performing a fourier transformation adapted to the transfer function of human sensory organs as well as a noise reduction facility and a speech recognition facility |
| 11/21/2002 | WO2002093181A1 Waveform detector and state monitoring system using it |
| 11/21/2002 | WO2001027605A9 Highly time resolved impedance spectroscopy |
| 11/20/2002 | EP0692099B1 Phase testing device |
| 11/19/2002 | US6484112 Method for estimating the frequency of a time signal |
| 11/19/2002 | US6484111 Real time signal analyzer |
| 11/19/2002 | US6483286 Method and apparatus for measuring the instantaneous frequency of FM signals |
| 11/13/2002 | CN1379929A Frequency measurement circuit |
| 11/07/2002 | US20020165682 Beam propagation method for step-index waveguides |
| 11/05/2002 | US6477214 Phase-based frequency estimation using filter banks |
| 11/05/2002 | US6476932 Digital resolution translator |
| 10/30/2002 | CN1376927A Broadband design of detecting analytic system |
| 10/24/2002 | WO2002084234A1 Apparatus and method for the analysis of signal frequencies |
| 10/23/2002 | EP1250606A1 Magnetic digital signal coupler monitor |
| 10/22/2002 | US6470295 Method for displaying statistically occurring events |
| 10/22/2002 | US6467351 Apparatus for tracking resonant frequency |
| 10/17/2002 | WO2002082106A1 Method and device for analysing a digital audio signal |
| 10/15/2002 | CA2150198C Digitally controlled circuit interrupter with improved automatic selection of sampling interval for 50 hz and 60 hz power systems |
| 10/09/2002 | EP1248395A2 Reference frequency spur cancellation in synthesized measurement receivers |
| 10/09/2002 | EP1248115A1 Method of setting grids and/or markers in measuring apparatus |
| 10/03/2002 | US20020140415 Method of setting gribs and/or markers in measuring apparatus |
| 10/02/2002 | CA2379484A1 Method of setting grids and/or markers in measuring apparatus |
| 09/26/2002 | WO2002021282A8 Method and apparatus for estimating physical parameters in a signal |
| 09/26/2002 | US20020138208 Method for analyzing mass spectra |
| 09/26/2002 | US20020135378 Broadband design of a probe analysis system |
| 09/26/2002 | US20020135351 Resolution filter for a spectrum analyzer |
| 09/25/2002 | EP1244133A2 Broadband design of a probe analysis system |
| 09/24/2002 | US6456950 Method and apparatus for estimating and digitizing instantaneous frequency and phase of bandpass signals |
| 09/24/2002 | US6456092 Network vector channel analyzer |
| 09/19/2002 | WO2002073222A1 Frequency analyzing method, frequency analyzing apparatus, and spectrum analyzer |
| 09/19/2002 | DE10110265A1 Periodic voltage frequency determination circuit for motor e.g. for vehicle electric window, uses comparison of phase-shifted versions of AC input voltage after removal of DC component with frequency evaluation of comparator output |
| 09/18/2002 | EP0940004B1 Apparatus for tracking resonant frequency |
| 09/12/2002 | DE10052304C2 Vorrichtung und Verfahren zur Frequenzmessung mit Integration der Signalphase Apparatus and method for frequency measurement with integration of the signal phase |
| 09/11/2002 | EP1239455A2 Method and system for implementing a Fourier transformation which is adapted to the transfer function of human sensory organs, and systems for noise reduction and speech recognition based thereon |
| 09/11/2002 | EP1239291A1 Presence detection procedure for a pure frequency or for a frequency linearly modulated |
| 09/10/2002 | US6449570 Analysis of noise in repetitive waveforms |
| 09/10/2002 | US6448757 Precise digital frequency detection |
| 09/10/2002 | US6448754 BIST method for testing cut-off frequency of low-pass filters |
| 09/06/2002 | WO2002069077A2 Separation of periodic and non-periodic signal components |
| 09/05/2002 | US20020121890 Multiple simultaneous optical frequency measurement |
| 09/04/2002 | EP1236050A1 Analysing signals |