LeCroy Corporation Patent applications |
Patent application number | Title | Published |
20130265079 | METHOD FOR PRINTED CIRCUIT BOARD TRACE CHARACTERIZATION - A method is provided which measures PCB trace characteristics from measurements of a PCB trace structure. | 10-10-2013 |
20130076409 | Multiple Channel Distributed System and Method - A complex acquisition system and method for synchronizing components thereof. The complex acquisition system further including a master acquisition module. The master acquisition module further including an analog to digital acquisition signal generator for generating an analog to digital acquisition signal, a memory acquisition signal generator for generating a memory acquisition signal, a delay calibration signal for generating a delay calibration signal, a step source signal generator for generating a step source signal, and a synchronization module. The complex acquisition system further includes a plurality of slave acquisition modules, each also including a synchronization module. The complex acquisition system additionally includes a distribution system for distributing each of the analog to digital acquisition signal, memory acquisition signal, delay calibration signal and step source signal to each of the synchronization modules in the master and plurality of slave acquisition modules. | 03-28-2013 |
20120323505 | METHOD FOR DE-EMBEDDING IN NETWORK ANALYSIS - A method is provided for de-embedding fixtures and/or probes from measurements of devices where probes and fixtures are connected between the ports of a network analysis instrument and a device-under-test. | 12-20-2012 |
20120173188 | METHOD AND APPARATUS FOR MULTIPLE TRIGGER PATH TRIGGERING - A method and apparatus for determining a trigger in a test and measurement apparatus are provided. The method comprises the steps of loading a first trigger configuration to a first trigger element of the test and measurement apparatus and loading a second trigger configuration to a second trigger element of the test and measurement apparatus so that these trigger elements operate substantially simultaneously, It is then determined whether the input signal generates a trigger in accordance with the one or more trigger configurations. | 07-05-2012 |
20120041720 | High Bandwidth Oscilloscope for Digitizing an Analog Signal Having a Bandwidth Greater than the Bandwidth of Digitizing Components of the Oscilloscope - A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content. | 02-16-2012 |
20110286506 | User Interface for Signal Integrity Network Analyzer - A signal integrity network analyzer is provided. The analyzer preferably includes a characterization module for characterizing a device under test, an acquisition module for acquiring a waveform, a de-embedding module for selectively embedding and de-embedding on or more system fixtures, and an analysis module for performing analysis on the acquired waveform, with one or more system features selectively embedded or de-embedded. A single user interface is provided and is adapted to control the characterization module, the acquisition module, the de-embedding module and the analysis module. | 11-24-2011 |
20110191066 | Method and Apparatus for Synchronization of Test and Measurement Apparatuses - A synchronization apparatus and method for synchronizing a plurality of test and measurement apparatuses or signal generators are provided. A trigger selector is provided or for selecting from a plurality of triggers to be provided to the plurality of test and measurement apparatuses. A trigger enabled input is also provided for receiving a trigger enabled signal from each of the plurality of test and measurement apparatuses and a synchronizing block is provided for generating a single synchronized time stamp signal with the selected trigger and the trigger enabled inputs. A plurality of trigger outputs are also provided for providing the time stamp signal to a trigger input of each of the plurality of test and measurement apparatuses. | 08-04-2011 |
20110191054 | TIME DOMAIN NETWORK ANALYZER - An apparatus for measuring s-parameters using as few as one pulser and two samplers is described. The apparatus calibrates itself automatically using the internal calibration standards. | 08-04-2011 |
20110191047 | Wavelet Denoising for Time-Domain Network Analysis - A method and apparatus are provided for the removal of significant broadband noise from waveforms acquired for time domain network analysis. | 08-04-2011 |
20110191046 | TIME DOMAIN REFLECTOMETRY STEP TO S-PARAMETER CONVERSION - A method and apparatus are provided for calculating s-parameters of a device under test from step waveforms acquired by a time domain network analyzer. | 08-04-2011 |
20110187381 | Time Domain Reflectometry in a Coherent Interleaved Sampling Timebase - A system and method for performing a time domain reflectometry measurement. The system includes a coherent interleaved sampling timebase, a sampling strobe generator for generating one or more sampling strobes in accordance with the coherent interleaved sampling timebase, a time domain reflectometry sampling strobe generator for generating one or more time domain reflectometry strobes in accordance with one or more of the generated sampling strobes; and a sampling module for sampling a time domain reflectometry signal in accordance with one or more of the one or more generated sampling strobes and one or more of the one or more generated time domain reflectometry strobes. The system further includes an analog to digital converter for analog to digital converting the samples of the time domain reflectometry signal and a memory for storing the converted samples of the time domain reflectometry signal. | 08-04-2011 |
20110119536 | Estimating Bit Error Rate Performance of Signals - A system for estimating bit error rates (BER) may include using a normalization factor that scales a BER to substantially normalize a Q-scale for a distribution under analysis. A normalization factor may be selected, for example, to provide a best linear fit for both right and left sides of a cumulative distribution function (CDF). In some examples, the normalized Q-scale algorithm may identify means and probabilistic amplitude(s) of Gaussian jitter contributors in the dominant extreme behavior on both sides of the distribution. For such contributors, means may be obtained from intercepts of both sides of the CDF(Qnorm(BER) with the Q(BER)=0 axis, standard deviations (sigmas) may be obtained from reciprocals of slopes of best linear fits, and amplitudes may be obtained directly from the normalization factors. In an illustrative example, a normalized Q-scale algorithm may be used to accurately predict bit error rates for sampled repeating or non-repeating data patterns. | 05-19-2011 |
20110115470 | Rotatable Display for Test and Measurement Apparatus - A physically rotatable display for a test and measurement apparatus is provided. The display of instrument information and data is automatically reconfigured based on the user selected orientation to provide optimal data display | 05-19-2011 |
20100244811 | High bandwidth oscilloscope for digitizing an analog signal having a bandwidth greater than the bandwidth of digitizing components of the oscilloscope - A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content. | 09-30-2010 |
20100121595 | Virtual Probing - A method and apparatus for generating one or more transfer functions for converting waveforms. The method comprises the steps of determining a system description, representative of a circuit, comprising a plurality of system components, each system component comprising at least one component characteristic, the system description further comprising at least one measurement node and at least one output node, each of the at least one measurement nodes representative of a waveform digitizing location in the circuit. One or more transfer functions are determined for converting a waveform from one or more of the at least one measurement nodes to a waveform at one or more of the at least one output nodes. The generated transfer functions are then stored in a computer readable medium. | 05-13-2010 |
20100039132 | Probing Apparatus - A probe for probing an electrical device under test is provided. The probe comprises a camera positioned adjacent a probing tip of the probe. Visual information captured by the camera is displayed on a display device. The camera may be mounted in multiple locations as desired by a user and additionally, multiple cameras may be used with the probe to allow for more viewing angles. | 02-18-2010 |
20090309879 | Statistically-based Display Processing - In exemplary embodiments, a waveform processor system may update pixel state information as a function of current pixel state information (e.g., intensity, color) by comparing a randomized value to a set of predetermined threshold values that correspond to different permitted pixel states. In an illustrative example, each time a display screen is updated, the image may represent multiple (e.g., 2000) triggered sweeps of the waveform. For each triggered sweep, the waveform data is associated with specific pixels on the display screen. To determine how to update each pixel's state (e.g., brightness, color) for the next screen update, each waveform hit on a pixel may initiate a comparison between a randomized value (e.g., pseudorandom number) and the predetermined threshold value for the pixel's current pixel state. In some examples, the pixel state may be increased to the next level if the randomized value exceeds the predetermined threshold value. | 12-17-2009 |
20090281759 | Method and Apparatus for Multiple Trigger Path Triggering - A method and apparatus for determining a trigger in a test and measurement apparatus are provided. The method comprises the steps of loading a first trigger configuration to a first trigger element of the test and measurement apparatus and loading a second trigger configuration to a second trigger element of the test and measurement apparatus so that these trigger elements operate substantially simultaneously. It is then determined whether the input signal generates a trigger in accordance with the one or more trigger configurations. | 11-12-2009 |
20090281758 | Method and Apparatus for Triggering a Test and Measurement Instrument - A method and apparatus for determining a trigger in a test and measurement apparatus are provided. The method comprises the steps of loading a first trigger configuration to the test and measurement apparatus and determining for a first predetermined time whether an input signal generates a trigger. Thereafter, a second trigger configuration is loaded to the test and measurement apparatus upon the conclusion of the first predetermined time and for a second predetermined time it is determined whether the input signal generates a trigger. | 11-12-2009 |
20090281748 | Method and Aparatus for Trigger Scanning - A method and apparatus for determining a trigger in a test and measurement apparatus are provided. The method comprises the steps of indicating one or more anomalies to be found, loading a first trigger configuration to the test and measurement apparatus and determining for a first predetermined time whether an input signal generates a trigger related to one or more of the one or more anomalies. A second trigger configuration is loaded to the test and measurement apparatus upon the conclusion of the first predetermined time, and for a second predetermined time it is determined whether the input signal generates a trigger related to one or more of the one or more anomalies. | 11-12-2009 |
20090267947 | Method and Apparatus for Data Preview - A method and apparatus for displaying information on a device acquiring data is provided. The method includes the steps of receiving an input data, generating a version of the received input data to be displayed in accordance with one or more display parameters and displaying the generated version of the received input data. A requested change in one or more display parameters is received and the requested change of the one or more display parameters is implemented on the displayed data. Processing continues on the further received input data in accordance with the requested change in the one or more display parameters and the display is ultimately updated with the processed further received input data. | 10-29-2009 |
20090189651 | High Speed Arbitrary Waveform Generator - A high-speed arbitrary waveform generator (AWG) that utilizes multiple digital-to-analog converters (D/A converters) and overcomes bandwidth limitations of individual D/A converters to produce high-speed waveforms. | 07-30-2009 |
20090093986 | Method and Apparatus for Elimination of Spurious Response due to Mixer Feed-Through - A method for correcting feed through signals for use with an oscilloscope employing Digital Bandwidth Interleaving is provided. The method comprises the steps of converting an original signal to a frequency other than an original frequency of the original signal, determining one or more feed through signals not converted with the original signal, providing an offsetting correction signal and combining the converted signal, the non-converted feed through signal, and the offsetting correction signal. | 04-09-2009 |
20090015453 | High speed arbitrary waveform generator - A high-speed arbitrary waveform generator (AWG) that utilizes multiple digital-to-analog converters (D/A converters) and overcomes bandwidth limitations of individual D/A converters to produce high-speed waveforms. | 01-15-2009 |
20090003502 | Bit pattern synchronization in acquired waveforms - A waveform processing system performs operations that may include identifying a location of a specified bit pattern within a coherently sampled repeating pattern input signal. In some examples, multiple periods of a repeating pattern signal are acquired using coherent sampling techniques such as, for example, coherent interleaved sampling (CIS). In such examples, the sampled waveform may be converted to a binary pattern that can be searched to locate a match to a predetermined or user-specified bit pattern. In one illustrative example, the identified location may be used to display the sampled waveform. In another example, the identified location may be used to measure pattern-dependent jitter of the sampled waveform. | 01-01-2009 |
20090002213 | Method and Apparatus for a High Bandwidth Oscilloscope Utilizing Multiple Channel Digital Bandwidth Interleaving - A method of digitizing an analog signal is provided, comprising the steps of separating the analog signal spanning a frequency range into a plurality of frequency bands, each frequency band spanning a corresponding predefined frequency range, at least a portion of each of the plurality of corresponding frequency ranges not overlapping any other of the plurality of corresponding predefined frequency ranges and then translating at least one of the signals in the plurality of frequency bands to a lower frequency band in accordance with a local oscillator and digitizing the at least one translated signal with digitizing elements having a frequency range less than the analog signal frequency range. A fixed relationship of the phase of the local oscillator and a repetitive signal generated in accordance with a writing to a circular buffer of the digitized representation of the at least one of the plurality of frequency bands is then defined. Signals corresponding to the other of the plurality of frequency bands are digitized and written to corresponding circular buffers in accordance with one or more corresponding local oscillators. Finally, a digital representation of the analog signal is formed from the digitized signals, the digital representation substantially spanning the frequency range of the analog signal, and the digital representation is stored in a computer readable medium. | 01-01-2009 |
20080310315 | Equalized trigger - A data acquisition apparatus and method are provided. The apparatus comprises a receiver for receiving an analog data signal, an equalizer for equalizing the received analog data signal. A trigger element is provided for generating a trigger signal in accordance with the equalized analog data signal. A memory element stores a digitized version of the received analog data signal digitized by an analog to digital converter in accordance with the generated trigger signal. | 12-18-2008 |
20080278143 | Remote Display and Control for Test and Measurement Apparatus - A remote display for a test and measurement apparatus is provided including a control panel. The control panel is removable and user-replaceable with an alternate control panel. The control panel can be connected to the remote display device to control and interact with the test and measurement apparatus, and to control the display of information on the remote display device. | 11-13-2008 |
20080258957 | High Bandwidth Oscilloscope - A method for improving bandwidth of an oscilloscope involves, in preferred embodiments, the use of frequency up-conversion and down-conversion techniques. In an illustrative embodiment the technique involves separating an input signal into a high frequency content and a low frequency content, down-converting the high frequency content in the analog domain so that it may be processed by the oscilloscope's analog front end, digitizing the low frequency content and the down-converted high frequency content, and forming a digital representation of the received analog signal from the digitized low frequency content and high frequency content. | 10-23-2008 |
20080243406 | Temporally aligned waveform processing - Methods for processing waveforms may include using temporal descriptor information about an input waveform to selectively request a segment of the input waveform that, when processed by a filter, produces a segment of an output waveform. In an illustrative example, waveform descriptor information may be used to request data to perform unary or filtering operations, or to perform one or more processes that involve at least one additional waveform. In combination with a filter descriptor that identifies, for example, upsampling factor, delay samples, and startup samples, complex waveform operations may be processed by selectively pulling input waveform segment data to generate a segment of the output waveform. In embodiments that process sequential waveform segments, filter tap states may be initialized using state information from processing of a previous waveform segment. | 10-02-2008 |
20080231256 | Removable Front Panel Control for Oscilloscope - A test and measurement apparatus is provided including a control panel. The control panel is removable and user-replaceable with an alternate control panel. The control panel can be connected to the test and measurement apparatus or to a generic local computing device to control and interact with the test and measurement apparatus. | 09-25-2008 |