Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8159208 | Hand-held microwave spectrum analyzer with operation range from 9 KHz to over 20 GHz A spectrum analyzer is provided that includes components to achieve from below 9 kHz to above 20 GHz operation range while remaining hand-held. Components of the spectrum analyzer include an integrated precision stand-alone step attenuator that does not rely on prin... | 04/17/2012 |
| 8022687 | Secum-trahenz method, especially for a network analyzer, for measurement of a device The invention relates to a method for measuring objects for measurement, by means of a network analyzer with several measurement ports, at least one signal generator, for stimulating the object for measurement and at least one local oscillator, for measurement of th... | 09/20/2011 |
| 7868607 | Test method for frequency converters with embedded local oscillators A method is presented where the phase trace is offset for each sweep such that the first point is always at zero degrees. The resulting traces are then averaged. The average reduces the noise in the phase trace and results in a less noisy group delay trace. ... | 01/11/2011 |
| 7741831 | Frequency component measuring device It is possible to provide a frequency component measuring device capable of narrowing the range of transmission frequency of a local oscillator, preventing degradation of the level measurement accuracy, and measuring the level of a modulation wave. The device includ... | 06/22/2010 |
| 7714564 | Gated sweep in spectrum analyzers A measurement technique that provides a full solution to the gated local oscillator sweep measurement and improves the accuracy of signal analyzers in gated sweep mode by pre-sweeping the local oscillator at the beginning of a gate pulse and over-sweeping the local ... | 05/11/2010 |
| 7659708 | Broadcast receiver having integrated spectrum analysis A receiver for receiving a broadcast channel comprising a spectrum analyzer physically integrated into the receiver and operative to receive an intermediate frequency signal and process the spectral contents of the receive signal. ... | 02/09/2010 |
| 7362122 | Method and circuit for extracting current-voltage characteristics of device A method and a circuit for extracting current-voltage characteristics employ two pulse signals with different duty cycles into a device to be measured in order to extracting current-voltage characteristics of the device to be measured. The present invention may redu... | 04/22/2008 |
| 7352827 | Multichannel simultaneous real time spectrum analysis with offset frequency trigger An instrumentation receiver for multichannel simultaneously realtime spectrum analysis with frequency trigger offset inputs a wideband IF signal derived from a wideband RF signal by the receiver to both a wideband IF channel and a narrowband IF channel simultaneousl... | 04/01/2008 |
| 7315797 | Method and system for eliminating VSWR errors in phase and amplitude measurements A method and system for canceling VSWR effects is provided. The exemplary method includes taking multiple measurements of parameters of a signal with a phase of the microwave signal shifted for each measurement; and processing the measured parameters to eliminate VS... | 01/01/2008 |
| 7313492 | Method and device for increasing the dynamic range and measuring accuracy of a measuring device for spectrum and/or network analysis A method and a device for increasing the dynamic range and measuring accuracy of a measuring device for spectrum and/or network analysis images a high-frequency electronic signal within a frequency range into at least two spectra through a first frequency translatio... | 12/25/2007 |
| 7302017 | System and method for adaptive matched filter signal parameter measurement A robust and flexible system for signal parameter measurements in the field of signal processing dynamically uses signal parameters from previous signal detections and parametric priorities to adaptively control and process the signal in an efficient and reliable ma... | 11/27/2007 |
| 7299166 | System and method for characterizing and simulating a frequency translation device The present invention is a system and method of characterizing and simulating frequency translation devices. By supplying a stimulus condition as input to the frequency translation device, measurements of the intermodulation products in the output spectrum can be ob... | 11/20/2007 |
| 7292656 | Signal pulse detection scheme for use in real-time spectrum analysis A spectrum analysis engine (SAGE) that comprises a spectrum analyzer component, a signal detector component, a universal signal synchronizer component and a snapshot buffer component. The spectrum analyzer component generates data representing a real-time spectrogra... | 11/06/2007 |
| 7292985 | Device and method for reducing stuttering The present invention is directed to a wearable stutter reducing device incorporating novel methods that make extensive use of digital signal processing (DSP) technology. The wearable stutter reducing device of the present invention has an audio signal receiver for ... | 11/06/2007 |
| 7254191 | System and method for real-time spectrum analysis in a radio device A real-time spectrum analysis engine (SAGE) that comprises a spectrum analyzer component, a signal detector component, a universal signal synchronizer component and a snapshot buffer component. The spectrum analyzer component generates data representing a real-time ... | 08/07/2007 |
| 7248033 | Vector network analyzer with independently tuned receivers characterizes frequency translation devices A Vector Network Analyzer is equipped with receivers for measuring a1, b1, a2 and b2 and which can each be tuned to track either the RF signal (F1) applied to the FTD or to the IF (F2) produced by the FTD. Ad... | 07/24/2007 |
| 7224752 | System and method for real-time spectrum analysis in a communication device A spectrum analysis engine (SAGE) that comprises a spectrum analyzer component, a signal detector component, a universal signal synchronizer component and a snapshot buffer component. The spectrum analyzer component generates data representing a real-time spectrogra... | 05/29/2007 |
| 7155171 | Vector network analyzer applique for adaptive communications in wireless networks A test signal generator at a transmitter station and a facsimile generator at a receiver station go through an acquisition and tracking process which aligns the two signals so that a logical processor can compute the frequency transfer function of the entire propaga... | 12/26/2006 |
| 7117022 | CDMA base station system A RF characteristic analyzer for a communications system including an input/output module, coupled to the communications system, a first analyzing circuit coupled to receive and analyze a transmission signal of the communications system through the input/output modu... | 10/03/2006 |
| 7116092 | Integrated spectrum analyzer circuits and methods for providing on-chip diagnostics Spectrum analyzer circuits and methods are provided which implement “zero-IF” (direct conversion) or “near-zero IF” (or very low IF) architectures that enable implementation of integrated (on-chip) spectrum analyzers for measuring the frequency spectrum of i... | 10/03/2006 |
| 7061222 | Automated testing of frequency converter device A frequency converter is tested. Labels for a plurality of mixing products are displayed. In response to a user selecting a first mixing product from the plurality of mixing products, appropriate frequencies for the first mixing product are calculated. Also, a measu... | 06/13/2006 |
| 7040225 | Method for reducing vibrations in rotating components Undesirable bending vibrations in at least one rotating component are reduced. An undesirable vibration is counteracted by the use of at least one actuator. A required sequence of signals to be applied to the actuator and/or an intensity level of those signals is ba... | 05/09/2006 |
| 7017483 | Method and device for reducing vibrations in rotating components Undesirable bending vibrations in at least one rotating component are reduced. An undesirable vibration is counteracted by the use of at least one actuator. A required sequence of signals to be applied to the actuator and/or an intensity level of those signals is ba... | 03/28/2006 |
| 7019510 | Portable ultra wide band handheld VNA A handheld Vector Network Analyzer (VNA) is provided with circuitry capable of providing operation over a very wide bandwidth. The VNA includes two reflectometers, a first high frequency reflectometer (150) such as the model S331 Site Master™ and a second l... | 03/28/2006 |
| 7002335 | Method for measuring a three-port device using a two-port vector network analyzer A method for vector characterization of a frequency translation device (“FTD”) includes coupling a first signal from a first signal source through a reference directional coupler and through a test directional coupler of an electronic test set to a first port of... | 02/21/2006 |
| 6980163 | Signal leakage detector An antenna apparatus for detecting a leaked electromagnetic signal is provided. The apparatus includes a telescoping antenna and a casing, which has a portion of the antenna mounted in it. The antenna can move telescopically relative to the casing between an extende... | 12/27/2005 |
| 6970000 | Measuring device, in particular vectorial network analyzer, with separate oscillators A measuring device (e.g., a vectorial network analyzer) by means of at least two ports can be connected to a device under test and has associated excitation/receiving units (ERUs), each thereof having one port. At least one ERU has a signal generator, which can appl... | 11/29/2005 |
| 6965241 | Automated electronic calibration apparatus Testing is performed on a device under test. A first port of a first calibration module is connected to the device under test. A second port of the first calibration module is connected to a network analyzer. A first port of a second calibration module is connected ... | 11/15/2005 |
| 6915225 | Method, apparatus and system for digital data resampling utilizing fourier series based interpolation The present invention provides a methodology, apparatus and system for resampling digital data utilizing a Fourier series based interpolation engine 104. A quick means to up-sample or down-sample data is provided without requiring computationally intensive pr... | 07/05/2005 |
| 6904381 | Testing of a frequency converter device A user interface is presented for a tester that tests a frequency converter having an input port, an output port and a local oscillator port. In a first area, a user can specify frequency for an input signal to be placed on the input port. In a second area, the user... | 06/07/2005 |
| 6891904 | Modulation signal analysis apparatus An analysis operation section uses a digital signal converted by an A/D converter, and performs frequency analysis for a modulation signal and modulation analysis for the modulation signal selected by a signal selection circuit in order to modulate/analyze a digital... | 05/10/2005 |
| 6861833 | Frequency conversion sweep measuring method A preselector is omitted in a spectrum analyzer, for example, which is used to prevent an image signal from being inputted. In addition, an image signal of a signal which is located outside a range of set-up measured frequencies is suppressed as much as possible. Fo... | 03/01/2005 |
| 6856924 | Mixer-based timebase for sampling multiple input signal references asynchronous to each other Sampling is performed. A strobe signal is generated from a first signal. Multiple sampled signals are sampled using the strobe signal. Each of the multiple sampled signals is synchronous with its own clock reference and each of clock references are asynchronous with... | 02/15/2005 |
| 6836105 | Apparatus for power measuring receiver Power measuring receiver (PMR) methods and apparatus for measuring power of signals are provided in which a high frequency measuring circuit (HFMC), a conversion measuring circuit (CMC), and an intermediate frequency measuring circuit (IFMC) work in conjunction with... | 12/28/2004 |
| 6724177 | Method and apparatus for accurate measurement of communications signals The present invention, generally speaking, provides a method and apparatus for accurately measuring a communications signal. In accordance with one aspect of the invention, DC offset effects and nonlinearities attributable to a communications amplifier are made spec... | 04/20/2004 |
| 6700516 | Mixer-based timebase for signal sampling Signal sampling is performed. A sampler takes samples of a sampled signal. A first analog-to-digital (A/D) converter receives the samples from the sampler. A clock reference is synchronous with the sampled signal. A phase comparator produces a difference ... | 03/02/2004 |
| 6677882 | Multi-octave high-resolution receiver for instantaneous frequency measurements An RF band receiver for concurrently monitoring a plurality of contiguous channels within the RF spectrum to unambiguously detect time-coincident signals. The receiver includes a plurality of transmission paths feeding a like number of digital, mixed-base... | 01/13/2004 |
| 6534966 | Methods and apparatus for power measuring receiver Power measuring receiver (PMR) methods and apparatus for measuring power of signals are provided in which a high frequency measuring circuit (HFMC), a conversion measuring circuit (CMC), and an intermediate frequency measuring circuit (IFMC) work in conju... | 03/18/2003 |
| 6518741 | Modulation analyzing apparatus with balance/imbalance converter An inversion in-phase component and a non-inversion in-phase component of a modulation signal inputted from a quadrature modulation section of a sample machine captured in a pair of signal lines, and an inversion quadrature component and a non-inversion q... | 02/11/2003 |
| 6507624 | Bandpass sampling architecture for wide-frequency band signal analysis A bandpass sampling system (10) of this invention employs a conventional mixer (14) driven by a frequency-tunable LO (16) to upconvert a signal frequency band to an IF frequency band that is above the signal frequency band. The IF frequency band is passed... | 01/14/2003 |
