Abstract: The present disclosure provides a measurement device comprising at least two measurement signal inputs, and at least two multi-channel analog-to-digital converters, each multi-channel analog-to-digital converter comprising two ADC signal inputs and being selectively operable in an interleaved operating mode or a non-interleaved operating mode, wherein each one of the measurement signal inputs of consecutive pairs of signal inputs is coupled to a different one of the multi-channel analog-to-digital converters. The present disclosure further provides a respective method.

Abstract: A spectrum acquirer acquires a plurality of mass spectrums. A specific physical quantity calculator calculates a specific physical quantity reflecting an amount of ions with respect to each of the plurality of obtained mass spectrums. A spectrum sorter sorts the plurality of mass spectrums in order of the specific physical quantity calculated with respect to each mass spectrum. A display controller allows a display to display the plurality of sorted mass spectrums. A spectrum selector selects a plurality of mass spectrums having specific physical quantities in a designated range from the plurality of displayed mass spectrums. A post-selection spectrum integrator integrates the plurality of selected mass spectrums. The display controller allows the display to display the post-selection integrated mass spectrum.

Abstract: A bit error rate determination method for determining a bit error rate of an input signal is described, wherein the input signal is generated by a signal source, comprising: at least one of receiving and generating a first histogram of a time interval error associated with a first bounded jitter component of the input signal; at least one of receiving and generating random jitter data comprising information on a time interval error associated with a random jitter component of the input signal; and determining the bit error rate based on at least one of the first histogram and the random jitter data. Further, a measurement instrument is described.

Abstract: Embodiments may relate to techniques or circuitry for the control of a clock signal by a phase-locked loop (PLL) circuit. The technique may include the identification of a first parameter related to a gain of a digitally controlled oscillator (DCO) and a second parameter related to a resolution of a time-to-digital converter (TDC). The technique may then include the identification of a third parameter related to filter coefficients of a loop filter of the PLL circuit based on the first and second parameter. The circuit may then output a clock signal based on the first, second, and third parameters. Other embodiments may be described or claimed.

Abstract: A method for matching a color temperature of a display and a system thereof are provided. The system adopts a first color analyzer for obtaining a first regional color value for a specific area of the display, and a second color analyzer for obtaining a global color value for a whole area and a second regional color value for the specific area. While obtaining a difference between the first and second regional color values and another difference between the global color value and the second regional color value, a sum of the differences is calculated. The sum of differences and a global color target value obtained in an offline mode are referred to adjust a correction target for the specific area of the display. A new correction target can be obtained for providing display parameters of colors that are applied to the whole area of the display.

Abstract: A method for and apparatus processing a measurement signal of a dynamic physical quantity is provided which includes acquiring a measurement signal representing the dynamic physical quantity over time; comparing the acquired measurement signal with a predefined signal characteristic of the respective physical quantity or with a signal characteristic of another physical quantity being dependent from the respective physical quantity to provide a comparison result; and adjusting a waveform representing the acquired measurement signal based upon the comparison result. A digital oscilloscope is also provided.

Abstract: A manipulation candidate classification unit provided in this operation assistance device classifies manipulation logs associated with a plurality of events stored in a past case database, as manipulation candidates, on the basis of measured value feature quantity tolerance ranges, and groups the classified manipulation candidates and the measured value feature quantity tolerance ranges together to create manipulation candidate groups. A manipulation candidate search unit searches a manipulation candidate database for a manipulation candidate group associated with a feature quantity that is associated with a past event and that is close to a feature quantity associated with a new event, and outputs the found manipulation candidate group to an output unit.

Abstract: A digital sampling oscilloscope (DSO) includes a housing, an analog measurement input interface arranged in a housing wall of the housing and a measurement acquisition system having a digitizer and an acquisition memory coupled to the digitizer. The measurement acquisition system is integrated into the housing and coupled to the analog measurement input interface. The DSO further includes a signal generator integrated into the housing. An operation mode control signal output interface is arranged in a housing wall of the housing. The signal generator is coupled to the operation mode control signal output interface and is configured to output an operation mode control signal to a device under test (DUT) connected to both the operation mode control signal output interface and the analog measurement input interface for controlling a test operation mode of the DUT.

Abstract: A method and apparatus for resolving time base-generated errors from sampling scope-based measurements. Mutually synchronized repetitive waveform-to-be-analyzed signals (WAS) and repetitive sinusoidal reference signals (RS) are respectively applied to a first channel and a second channel of a sampling scope. A time base generator applies a sampling signal to the first and second channels. An average sine wave period Tav for k samples of RS is determined, followed by determination of phase error ?k for each of the k samples, corresponding to phase differences between an ideal sine wave signal and the applied reference sinusoidal signal. Time base error values dk for k samples are calculated from dk=?k*Tav/2?. Error values dk correct time base errors in the sampling signal, and the WAS is re-sampled at sampling times adjusted by dk.

Abstract: This disclosure relates generally to test and measurement instruments structured to detect that a series of events occurred, and structured to generate a trigger signal in response to detecting that a final event in the series of events occurred. The trigger may be generated based on a timeout signal, or based on another event, trigger, or signal. Stored data in the acquisition memory may be marked relative to the detection of the final event. An external forced timeout signal may control which in a series of events is marked as a final event. The triggering on final event may be enabled after another trigger is satisfied, and may be used as one of many different types of triggers.

Abstract: A measuring apparatus 10 includes: a transmission and reception unit 12 which wirelessly communicates with devices 1 to 3 under test (DUTs); a measurement unit 13 which receives data from the DUTs through the transmission and reception unit 12, measures the DUTs based on the received data and outputs measurement results; a display unit 15 which displays predetermined information regarding the measurement; a disconnection related information acquisition unit 24 which, on the condition that a connection state of the wireless communication has been changed to a disconnected state, acquires disconnection related information including information indicating a reason for changing to the disconnected state and information on a state immediately before the disconnected state; and a display control unit 14 which performs control to display the disconnection related information on the display unit 15.

Abstract: A method for measuring at least one signal with a digital oscilloscope according to the invention acquires sampled values of the at least one signal in individual time ranges which are each defined in relation to a trigger time of a trigger event, which is detected in the at least one signal in each case by the digital oscilloscope. A post-processing of the sampled values acquired in each case in the individual time ranges then takes place. According to the invention, the acquisition and the post-processing are implemented in parallel.

Abstract: A method and system for trend dynamic sensor imaging is described herein. In one embodiment a plurality of data sets is received and the plurality of data sets is pre-processed to transform the data of the plurality data sets to have a common scale. The pre-processed plurality of data sets is displayed by plotting the transformed data of the plurality of data sets on a grid according to a color gradient.

Abstract: A test and measurement instrument configured to receive at least one input signal is disclosed. The test and measurement instrument includes a processor configured to sample the input signal and generate a plurality of measurements. The processor is configured to generate a measurement ticker having a plurality of ticker elements configured for presentation on a display in a serial, scrolling fashion. Each ticker element has a measurement value associated with the input signal. The processor may be configured to sample a plurality of input signals and each ticker element may include a measurement value associated with at least one of the plurality of input signals. Each ticker element may further comprise a source ID and a measurement type.

Abstract: A sensing device comprises a transmitter and a receiver. The transmitter repetitively emits a modulated electro-magnetic signal and the emitted signal interacts with an object producing a counter propagating return signal. The return signal is detected and converted into digital signals by the receiver via a reception channel through the use of edge transitions rather than logic levels from one or more comparator outputs to reconstruct the return signal waveform. Waveform acquisition and reconstruction are based on edge sampling. Methods of providing optical feedback using a moving waveguide in time-of-flight distance measurements are also disclosed.

Abstract: A method for determining jitter and noise of an input signal.

Abstract: A test and measurement instrument includes an input terminal to receive a signal, acquisition circuitry to capture a plurality of triggered acquisitions, trigger circuitry to cause a trigger event responsive to trigger criteria, and a controller to dynamically reconfigure the trigger criteria between triggered acquisitions. The controller is configured to dynamically reconfigure the trigger criteria from the first set of trigger criteria to subsequent sets of trigger criteria between each of the triggered acquisitions. A method is disclosed for scanning information associated with an initial triggered acquisition and, depending on the nature of the scanned information, dynamically adjusting the next or any subsequent set of trigger criteria.

Abstract: An audio testing system is configured for receiving an audio signal from an audio emitting device. The system samples the audio signal and obtains sampling points from the audio signal for determining if the audio signal has been distorted. A related method is also disclosed.

Abstract: An audio testing system is configured for receiving an audio signal from the an audio emitting device. The system samples the audio signal and obtains sampling points from the audio signal for determining if the audio signal has been distorted. A related method is also disclosed.

Abstract: A switcher transmits, to an extractor/signal determiner, a converted current signal generated by a current-voltage converter when a converted current signal determiner determines that the converted current signal is generated by transmission of a current signal over a communication line, in the meantime, performs a switch-over so as not to transmit, to the extractor/signal determiner, a converted voltage signal generated by a voltage sensor. In addition, the switcher transmits, to the extractor/signal determiner, the converted voltage signal when a converted voltage signal determiner determines that the converted voltage signal is generated by transmission of a voltage signal over a communication line, in the meantime, performs a switch-over so as not to transmit, to the extractor/signal determiner, the converted current signal generated by the current-voltage converter.

Abstract: A waveform display method is disclosed. The method includes determining the narrowest pulse in a waveform for display and determining an available pixel width for displaying the narrowest pulse in a first display portion if the entire waveform is to be displayed in the first display portion. The pixel width is measure in terms of a number of pixels. The method further includes displaying the entire waveform or a portion thereof in the first display portion depending on the available pixel width. A signal measurement system that implements the method is also disclosed.

Abstract: A method of grouping multiple waveforms for a single channel of acquired data on a display area uses a graphic icon with the display area. The graphic icon has a first portion with a symbol indicating the single channel and with an indicator defining a baseline for the display area. The graphic icon also has a second portion with symbols indicating which of the multiple waveforms currently are being displayed. The symbol for the single channel and the symbol for a selected one of the multiple waveforms currently being displayed are highlighted. The highlighting may be via color, where the highlight color corresponds to the color of the waveforms currently being displayed.

Abstract: A radio frequency (RF) meter configured to measure both scalar power and phase information is disclosed. The meter performs a calibration to account for properties of an external coupler connected to the meter inputs. Internal couplers are optionally provided which direct the input signals to a phase detector. The meter is optionally connected to a display and network connections for transmitting the scalar power and phase information.

Abstract: A method and system for displaying waveforms generated from input signals received at a common input channel (CIC) of a data acquisition (DAQ) device. An input signal received at the CIC can be displayed as a present-time waveform, and while the input signal is displayed as a present-time waveform, the input signal can be tagged for displaying the input signal as a historical waveform for the CIC. After receiving another input signal at the CIC, a display can be refreshed to display, simultaneously, the historical waveform for the CIC and the other input signal as another present-time waveform for the CIC. The DAQ device can tag the displayed input signal in response to a user pushing a selector device on the DAQ device. The display can display other present-time waveforms with the historical waveform to allow a user to compare input signals received at the CIC.

Abstract: Disclosed is an improved real-time oscilloscope (“IRTO”) for generating a fast worst-case real-time eye diagram from an input signal. The IRTO may include signal conditioning circuitry, a digitizer, an acquisition memory, a clock and data recovery (“CDR”) module, a worst-case real-time eye diagram rendering (“WRTER”) module, and a display.

Abstract: A method of obtaining a consistent evaluation of the state of the system which has been monitored by measurement of multiple parameters of that system. The multiple parameters are used to calculate a single dimensional value based on the distance between the current state and normal states of the system using a Parzen Windows probability function. Consistent single dimensional values regardless of the dimensionality of the original data set can be obtained by finding a relationship between the single dimensional value and the probability of status of the system. Different relationships are obtained for different dimensionalities of data sets. Sensor malfunction can also be detected by testing the probability of the state implied by measuring all of the available parameters against the probability of the state implied by ignoring different individual ones of the parameters. A significant disparity in the two probabilities indicate possible sensor malfunction.

Abstract: Disclosed is an aerial surveying system for collecting electromagnetic spectrum data. Spectrally tuned antennas are used on an airplane to prefilter the data in accordance with spectral frequency bands. The data is sequentially sampled using an antenna switching device, band pass filtered and downconverted to an intermediate frequency. High speed vector signal analyzers and digitizers create frequency spectral data and I and Q temporal data. The collected data is recorded and compressed using any desirable compression technique, including video compression. Data analyzers analyze the data and display the data on a GIS map.

Abstract: Aspects of the invention include an equivalent-time sampling oscilloscope that receives a carrier signal, the carrier signal after it has been modulated with a repeating data pattern, and a pattern trigger signal that is synchronous with the data pattern. The carrier signal and the modulation are asynchronous, that is, they are not phase-locked in any way. The oscilloscope simultaneously samples the modulated carrier signal and quadrature phases of the unmodulated carrier signal at a plurality of timebase delays relative to the pattern trigger signal, and a plurality of times at each timebase delay. After collecting this information, the oscilloscope uses the quadrature samples to calculate phases of the unmodulated carrier signal that correspond to the samples of the modulated carrier signal.

Abstract: A display method and apparatus provides an easy to interpret presentation of multiple channel data, in the form of columns where the height of the column represents the relative measurement. A threshold line provides an indication of whether the measurement is above or below the threshold. Greater detail and numeric measurement values can be displayed for individual channels while the multiple channel display is in view.

Abstract: A VGA port testing system includes an oscilloscope and a testing device. The oscilloscope is adapted to connect to a VGA port of a motherboard to capture and detect signals output from the VGA port. The testing device is connected to the oscilloscope and adapted to automatically adjust preset parameters of the oscilloscope and create a testing report according to signal waveforms detected by the oscilloscope. The testing device further displays testing results according to the testing reports. A VGA port testing method using the VGA port testing system is also provided.

Abstract: The present invention provides a melatonin suppression extent measuring device, which is able to receive and process a light signal to a spectral data, process the spectral data to a percent value of melatonin suppression based on a reference wavelength parameter and a reference quanta parameter through a conversion module, and display the percent value of melatonin suppression; therefore, users can exactly know how many melatonin suppression extent are caused by the light environment which is exposing themselves body.

Abstract: Disclosed is a probe for an oscilloscope comprising a multi-stage transistor amplifier that acts as an impedance transformer. Said amplifier is a d.c.-coupled emitter follower circuit that is composed of bipolar transistors or a d.c.-coupled source follower circuit which is composed of field effect transistors and the successive amplifier elements of which are dimensioned and tuned to each other in such a way that the resulting offset direct voltage between the input and the output is minimal.

Abstract: Provided are a digital oscilloscope and a method for controlling the same. The digital oscilloscope comprises a trace intensity synthesizer including a first intensity memory and a second intensity memory. The controlling procedure performed by the digital oscilloscope includes: a determining step for determining whether the time interval of a trigger signal is larger than a predetermined threshold, a first fluorescence processing step performed when the time interval of a trigger signal is equal to or less than the predetermined threshold, and a second fluorescence processing step performed when the time interval of a trigger signal is larger than the predetermined threshold. The digital oscilloscope can automatically select the dynamic fluorescence effect to pay attention to the long-term variation of a signal when the triggering rate is low, and the static fluorescence effect to pay attention to the rapid variation of a signal when the triggering rate is high.

Abstract: In a multi-channel oscilloscope a method of calibrating interleaved digitizer channels initially calibrates each digitizer channel to produce a bandwidth enhanced filter for each digitizer channel to match the respective channel frequency and phase characteristics. The oscilloscope is then configured for interleaved operation whereby an input signal is applied to at least two digitizers via a switch through a common preamplifier to produce a reference digitizer channel and an interleaved digitizer channel where the bandwidth enhanced filter for the interleaved digitizer channel is now not correct. Fast Fourier transforms are performed on the data from the reference digitizer channel and the interleaved digitizer channel, from which are derived a match filter for the interleaved digitizer channel so the interleaved digitizer channel and reference digitizer channel are matched in phase and magnitude at all frequencies.

Abstract: A test and measurement instrument having initial display center frequency and span settings and configured to process an input signal is disclosed. The test and measurement instrument includes a processor configured to digitize the input signal and locate a primary peak and determine a primary peak center frequency of the input signal. The processor is configured to adjust the initial display center frequency setting based on the primary peak center frequency. The processor is configured to perform a bandwidth comparison by comparing a bandwidth of the primary peak at a peak bandwidth test level to a peak bandwidth threshold. The processor is configured adjust the initial span setting based on the bandwidth comparison and generate a processed waveform signal using the adjusted display center frequency and span settings.

Abstract: A test and measurement instrument configured to receive at least one input signal is disclosed. The test and measurement instrument includes a processor configured to sample the input signal and generate a plurality of measurements. The processor is configured to generate a measurement ticker having a plurality of ticker elements configured for presentation on a display in a serial, scrolling fashion. Each ticker element has a measurement value associated with the input signal. The processor may be configured to sample a plurality of input signals and each ticker element may include a measurement value associated with at least one of the plurality of input signals. Each ticker element may further comprise a source ID and a measurement type.

Abstract: A method for operating a data processing system to generate a test for a device under test (DUT) is disclosed. The method utilizes a model of the DUT that includes a plurality of blocks connected by wires and a set of control inputs. Each block includes a plurality of ports, each port being either active or inactive. Each block is also characterized by a set of constraints that limit which ports are active. The active ports of at least one of the blocks are constrained by one of the control inputs. A test vector having one component for each port of each block and one component for each control input is determined such that each set of constraints for each block is satisfied. The test vector defines a test for the DUT.

Abstract: A method and device for graphically representing the I and/or Q components of digitally modulated high frequency signal are described, in which the I or Q components measured in a temporally successive manner are graphically represented side-by-side on a display device.

Abstract: A device and method for generation of Intersymbol interference (ISI) effects on serial data by direct digital synthesis is described. The features of the present invention allow a user to set parameters such as data rate, voltage amplitude, encoding scheme etc. as per requirements. An ISI parameter value is selected and applied to the serial data to produce ISI effects in the serial data. Alternatively according to another feature the patterns may be set as per industry standards.

Abstract: Method and devices are described for visually detecting anomalies in non-repetitive signals. One device may take the form of an oscilloscope capable of displaying segments of a complete waveform record that includes non-periodic triggering events. The segments may be displayed vertically and horizontally offset from one another to aid in the visual detection of anomalies within the record. Decayed or aged segments of a waveform may also be simultaneously displayed.

Abstract: A method can include receiving an input signal having multiple signal edges, performing an initial scan of the input signal to identify peaks corresponding to the signal edges, and determining whether each peak is a Uniformly Synchronous (US) edge or a Quasi-Synchronous (QS) edge. The method can also include generating a final waveform and displaying the final waveform on a display device.

Abstract: A method for analyzing the output of a rotary sensor, such as that coupled to a vehicle wheel assembly. In one embodiment, the method detects periodic irregularities in the output of an incremental rotary sensor and uses those irregularities with a reference signal and a pattern comparison technique to determine the absolute angular position of the sensor.

Abstract: An apparatus and method for triggering an oscilloscope is disclosed. The oscilloscope is configured to process a first signal in a first domain and a second signal in a second domain. The method includes choosing a different domain for processing each of the first and second signals, respectively. A desired trigger type is selected for one of the chosen domains. The first and second signals are acquired in response to an occurrence of a trigger of the selected trigger type. The first and second signals are processed according to the selected different chosen domains. The method may also include displaying a result of said processing on a display screen.

Abstract: The measuring machine according to the invention has a display device, a processing device, and at least one measurement channel. The processing device measures the measurement signal of the at least one measurement channel. The display device displays the measurement signal of the at least one measurement channel as a chart. A plurality of charts can thereby be displayed at once. The display device additionally displays preview charts. The preview diagrams are scaled representations of the diagrams. The plurality of diagrams can be displayed cascaded and/or horizontally tiled and/or vertically tiled. The multiple plots can be displayed at different, preferably arbitrary positions of the display device.

Abstract: An arrangement for signal analysis provides at least one central data-processing unit and a screen unit connected to the at least one central data-processing unit, wherein the central data-processing unit calculates a spectrum and a spectrogram from a digitised signal. The at least one central data-processing unit is embodied in such a manner that it controls the screen unit in such a manner that the spectrogram of the digitised signal, the characteristic of the spectrum of the digitised signal and the characteristic of the digitised signal present in the time domain can be displayed together on the screen unit.

Abstract: A time-interleaved A/D converter apparatus has a primary signal A/D converter circuit group that is time-interleaved with a combination of N A/D converter circuits, a correction signal generation part operable to receive the input analog signal and a 1/m-sampling signal having a speed that is 1/m of a rate of the sampling signal inputted to the primary signal A/D converter circuit group, to extract a dispersion of a transmission line that is immanent in the input analog signal, and to output the dispersion as a dispersion compensation control signal used for digital signal compensation, and a signal processing part operable to convert the N digital signals into one digital signal based upon the dispersion compensation control signal and to compensate a dispersion included in the converted digital signal.

Abstract: A method is disclosed for defining an attenuation map. In at least one embodiment, the method includes creating at least two data sets from which attenuation values are able to be determined; evaluating the data sets and determining attenuation values; weighting the attenuation values determined and creating the attenuation map by inserting the weighted attenuation values.

Abstract: A testing system includes a computer, a connection cord, and a number of oscillographs. The each oscillograph has a GPIB port. The computer has a USB port. The connection cord has a USB connector for connection with the USB port and a GPIB connector for selectively connecting to a GPIB port of one of the oscillographs. The computer includes an oscillograph model displaying module, an oscillograph driving module, a storage module, and a testing interface module. The oscillograph model displaying module displays a number of oscillograph models for a user to select. The oscillograph driving module loads an oscillograph driver corresponding to the selected oscillograph model. The storage module stores a plurality of codes associated with a number of testing functions for different oscillographs. The testing interface module transmits the codes to the oscillograph, thereby driving the oscillograph to perform the associated testing functions to test a device.

Abstract: An output signal is generated from a received input data stream representing a sequence of digital data values. For each group of successive data values in the sequence of data values, a respective waveform pattern is assigned in dependence of the data content of the respective group of successive data values. The output signal is generated by generating the assigned respective waveform patterns corresponding to the input data stream.

Abstract: Systems, methods and apparatus are described for testing a data connection provided over a power supply line. A testing apparatus is coupled to a socket of the power supply line. The AC power supply line communicatively couples the testing apparatus to a communication device or another testing apparatus. The testing apparatus identifies the signal strengths of signals received by the testing apparatus and identifies the signal strengths of signals received by the communication device. The testing apparatus outputs an indicator of the first signal strength and the second signal strength to a user and this information may be utilized to detect noise or other problems in the data connection provided over the AC power supply line.