REGISTER now for FREE 
|
FREE patent keyword monitoring and additional FREE benefits. REGISTER now for FREE
|
|
|
Pulse Or Digital Communications > Testing TestingTesting patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.10/04/07 - 20070230550 - Communications apparatus, system and method of creating a sub-channel A communications apparatus is capable of being disposed in-line in a communications link that supports a main communications channel. The communications link connects a first host to a second host. The communications apparatus comprises an application logic that supports a sub-channel within the main channel. When the main channel is ... 09/20/07 - 20070217493 - Authentication of identification documents Security of photographic identification documents is enhanced by embedding within the photographic image encoded information that may be correlated to other information pertaining to the individual represented by the image, such other information being, for example, printed on the document adjacent to the photograph. ... 09/13/07 - 20070211795 - Jitter measurement apparatus, electronic device, and test apparatus There is provided a jitter measurement apparatus to measure jitter of a signal under measurement. The jitter measurement apparatus includes a pulse generator that outputs a demodulated signal indicating the jitter of the signal under measurement, by outputting a pulse having a substantially constant pulse width in synchronization with each ... 09/06/07 - 20070206668 - Method and device for detecting inductive elements in a communication line A method for detecting inductive elements in a communication line, including the processes of: inputting a detecting signal to an end of the communication line; sampling the time domain voltage vector of one end of the communication line; generating the amplitude-frequency characteristic curve of the differential input impedance of one ... 09/06/07 - 20070206667 - Method for receiving a signal transmitted over several channels and corresponding device A method for receiving a signal including bursts of data transmitted over several channels, includes determining (6) a reference channel and receiving (8) the bursts from the reference channel, characterized in that it also includes monitoring (10) faults in the reception of the data from the reference channel and on ... 07/19/07 - 20070165711 - Electronic device including image forming apparatus When a plurality of sub-processors are daisy chained in a loop, for example, to a main processor by a one-way bus, a command packet from the main processor addressed to itself is transmitted to the one-way bus which form a return path back to the main processor so as to ... 07/05/07 - 20070153887 - Transmit equalizer compensation for probe receivers Transmit equalization over high speed digital communication paths may be compensated in a receiver for a probe on that path. In one example, a probe input provides a signal from an electronic communications path, the signal having been processed by a transmit equalizer. A filter circuit processes the signal to ... 06/07/07 - 20070127561 - Wireless communications system with reduced sideband noise and carrier leakage The present invention discloses a wireless communications system with reduced sideband noise and carrier leakage. In the system, at least one transmitter modulates at least one input signal with a first carrier to generate a modulated output signal, and at least one receiver receives the modulated output signal and demodulates ... 05/31/07 - 20070121715 - Method and device for crosstalk test in multi-subscriber communication line Embodiments of the present invention provide a method and a device for crosstalk test in multi-subscriber communication line. The core of embodiments includes: first, transmitting a test signal in a selected line; then, receiving the signal in the line to be tested, and calculating the received signal according to the ... 05/31/07 - 20070121714 - Flexible timebase for eye diagram A flexible timebase for eye diagrams uses a stable free running oscillator as a sample clock for equivalent time sampling of an input serial digital signal and of a reference signal, such as a sine wave, derived from a subdivided recovered clock of the input serial digital signal. The reference ... 05/31/07 - 20070121713 - Pulse pattern generator and communication device evaluation system utilizing the same A pulse pattern generator (11) has a pulse generating unit (12) and a lowpass filter (14), and the pulse generating unit (12) includes an amplitude-value setting unit (13, 13a). The pulse generating unit (12) generates a pulse signal formed in a step-like wave in which at least one of rise ... 05/17/07 - 20070110145 - Continuous self-calibration of internal analog signals A method and apparatus for monitoring and adjusting an analog signal of an operating circuit. The apparatus includes a control circuit, an analog-to-digital converter, and a comparator. The control circuit has an analog generator for generating the analog signal and an adjusting circuit for adjusting the strength of the analog ... 05/17/07 - 20070110144 - Method and program for correcting peak position of spectrum waveform pattern The invention relates to a peak position correcting method that is a pre-process for testing whether properties of a product, a raw material, etc., are good or defective from a spectrum waveform pattern. The method involves setting a reference peak position in a single region including a spectrum waveform pattern, ... 05/10/07 - 20070104260 - Jitter measuring apparatus, jitter measuring method and test apparatus There is provided a jitter measuring apparatus for measuring jitter in a signal-under-measurement having a first pulse generator for detecting edges of the data-signal-under-measurement to output a first pulse signal having a pulse width set in advance corresponding to the edge, a second pulse generator for detecting boundaries of data ... 05/03/07 - 20070098060 - Communication method for transmitting multiple packet signals, and radio apparatus and communication system using the same A radio apparatus communicates with a plurality of terminal apparatuses by using a packet signal composed of at least one stream. A control unit divides a certain period into a plurality of partial periods and assigns respectively the plurality of partial periods to the plurality of terminal apparatuses by associating ... 05/03/07 - 20070098059 - Testing device and method for providing receiver overload protection during transceiver testing A testing device for testing transceivers includes a transmitter operable in a first state to transmit signals, a receiver operable in a second state to receive signals and a power coupler coupling the transmitter to the receiver. The testing device further includes an overload protection device operably coupled between the ... 04/26/07 - 20070091991 - Strobe technique for test of digital signal timing A test system timing method simulates the timing of a synchronous clock on the device under test. Strobe pulses can be generated by routing an edge generator to delay elements with incrementally increasing delay values. A data signal or synchronous clock signal can be applied to the input of each ... 04/12/07 - 20070081583 - Methods and apparatus for frequency rectification A method of monitoring the condition of a machine is provided. The method includes receiving an input complex signal from the machine wherein the input complex signal has a plurality of signal components. The plurality of signal components includes at least one signal component containing a pre-determined frequency of interest ... 03/29/07 - 20070071082 - Electronic measuring device for detecting a process variable, in particular a radar or ultrasonic filling level measuring device, and a method for operating a measuring device of this type The invention related to a method and an electronic measuring device for detecting a process variable connectable to a two-wire line (101) for providing the supply energy and for digital communication with a process control, and a method for operating such a measuring device. An inventive measuring device includes a ... 03/29/07 - 20070071081 - Communication analysis apparatus and method and storage medium storing communication analysis program, and organization rigidification analysis apparatus and method and storage medium storing organization rigidification analysis program A communication analysis apparatus includes: first decision means for deciding a chance of a communication between users; second decision means for deciding an occurrences of the communication between the users; and analysis means for analyzing the occurrences of the communications decided by the second decision means, in association with the ... 03/29/07 - 20070071080 - Strobe technique for time stamping a digital signal A system and apparatus generates a time-stamp to identify and record the time of an event such as an edge received in a data signal or clock signal. A set of strobe pulses can be generated by routing an external clock signal to delay elements with incrementally increasing delay values. ... 03/22/07 - 20070064785 - System and method for variably inserting training symbols into transmissions by estimating the channel coherence time in a wireless communication network A system and method for controlling the quantity of training symbols in a transmission sequence sent by a terminal (102, 106, 107) in a wireless network (100). The transmission sequence include training symbols and data symbols. The system and method determine the number of data symbol errors which are close ... 03/22/07 - 20070064784 - Communication network and method for simulating or designing thereof A method (800) of simulating or designing a communication network supporting communication between a plurality of communication units. The method comprises the step of employing (855, 860) a simulation tool (300) to resolve a mathematical formula relating to an operation of the communication network. The method further comprises the step ... 03/15/07 - 20070058707 - Detecting wireless channel status from acoustic discrimination of spectral content Systems and methods of detecting wireless channel status from acoustic discrimination of spectral content are described. In one aspect, a wireless system includes a spectrum analyzer, a detector, and a controller. The spectrum analyzer is operable to acoustically discriminate spectral content of an input electrical signal in multiple discrete frequency ... 02/01/07 - 20070025433 - Methods and systems for calibrating for gain and phase imbalance and local oscillator feed-through Methods and systems to calibrating a transmitter for I/Q imbalance and local oscillator feed-through include generating a test tone, frequency up-converting the test tone, monitoring one or more features of the up-converted test tone, and adjusting one or more features of the transmitter in response to the monitoring. The monitoring ... 02/01/07 - 20070025432 - Method of characterizing fiber bragg gratings using iterative processing A method determines a complex reflection impulse response of a fiber Bragg grating. The method includes providing a measured amplitude of a complex reflection spectrum of the fiber Bragg grating. The method further includes providing an estimated phase term of the complex reflection spectrum. The method further includes multiplying the ... 01/25/07 - 20070019719 - Ternary search process An apparatus for use in obtaining a value from a device includes a first comparator to receive a reference high signal and a device signal, where the first comparator provides a first output signal to indicate whether the device signal is above or below the reference high signal, and a ... 01/18/07 - 20070014342 - Pseudo asynchronous serializer deserializer (serdes) testing The various embodiments of the invention provide an apparatus, system and method of asynchronous testing a serializer and deserializer data communication apparatus (SERDES) for determining frequency and phase locking to pseudo asynchronous input data having a continual phase offset. An exemplary apparatus includes a data sampler adapted to sample input ... 01/18/07 - 20070014341 - Optimized rfid/nfc ber testing A system and method for testing communication performance between two wireless communication devices. A value table is used to determine a test string in both the unit under test and another wireless device. An initiating device transmits data to the secondary device, which may check the incoming data for errors ... 01/11/07 - 20070009021 - Method for efficient calibration of evm using compression characteristics A method for estimating and measuring error vector magnitude (EVM) is provided by correlating a transmitter compression level to an EVM. ... 12/14/06 - 20060280239 - Signal shaping circuit A signal shaping circuit for shaping a test signal to be provided to a device under test includes a first signal path with a first transmission behavior and adapted to receive an input signal, and at least one second signal path with a second transmission behavior and adapted to receive ... 11/30/06 - 20060268968 - Method and apparatus for monitoring transmission quality In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter. ... 11/30/06 - 20060268967 - Supplying instruction to operational stations A method of supplying (1419, 1420) instructions to operational stations to operational stations (1501, 1502) is disclosed. Operations to be performed at said operational stations are defined as a graphical data floe diagram (1401). The data flow diagram is converted into sets of system description data. A respective set of ... 11/16/06 - 20060256847 - User interface for selection of sampling parameters in a logic analyzer whose data receivers are in groups each having a separate threshold that is common to the channels within each group Eye diagrams are made for signals on each channel in a group thereof. Outlying signals that do not exhibit overlap for a sampling parameter that is to be common for all channels may be ignored and a warning given. Selected, normalized eye openings are used to discover optimum sampling parameters ... 10/26/06 - 20060239338 - Modulation feature measurement and statistical classification system and method A modulation feature measurement and classification system for classifying a pulsed signal that includes a preprocessor, phase measurement system and modulation classifier. Preprocessor detects pulse starts and stops, measures pulse duration and converts the pulsed signal into digitized baseband in-phase/quadrature samples. Phase measurement system measures short chip counts, long chip ... 10/05/06 - 20060222062 - Calibrating automatic test equipment to account for magnitude and phase offsets A method of calibrating automatic test equipment (ATE) having transmission paths that transport signals includes obtaining amplitude gains of the signals across the transmission paths, obtaining phase delays of the signals across the transmission paths, obtaining magnitude and phase offsets associated with the signals based on the amplitude gains and ... 09/28/06 - 20060215744 - Test system and method for parallel modulation error measurement of transceivers A test system is capable of performing parallel modulation error measurement of transceivers using a loop-back configuration. Each transceiver includes a transmitter and a receiver. A signal generator generates a first modulated signal for input to the receivers of the transceivers. A tester is operable to measure a first demodulation ... 09/28/06 - 20060215743 - Property detection (formal verification) for a mixed system of analog and digital subsystems The invention relates to a method for detecting properties of a digital-analog mixed signal system (1) by formally verifying a digital substitution system (20). Component parameters and environment parameters are depicted as additional signals in the digital substitution model (substitution model, 20) for the analog components, and the analog part ... 09/07/06 - 20060198431 - Activity monitor for multiple rf channels An activity monitor for a multiple channel RF signal acquires time domain data from the RF signal over a wide bandwidth that includes multiple channels. The acquired data is separated by individual channel filters to provide channel data for each channel. The channel data is measured to produce measurement results ... 06/29/06 - 20060140261 - Apparatus for automatically detecting ber measurement signal An apparatus comprises input means, detection means and a selector, and automatically detects a kind of serial signal used in BER measurement. The input means receives at least two signals which include a data signal, and a clock signal having a period corresponding to one bit of the data signal. ... 06/22/06 - 20060133468 - Bit error rate tester and pseudo random bit sequences generator thereof A bit error rate tester and a pseudo random bit sequences (PRBS) generator thereof are provided. The bit error rate tester includes a transmitter PRBS generator, a master PRBS generator, a slave PRBS generator, a comparator, and a counting unit. The transmitter PRBS generator generates a parallel N-bit (N is ... 06/15/06 - 20060126711 - Method for transmitting an information of a mobile telecommunication system Method for transmitting an information representative of the number of spreading codes allocated to the mobile stations in communication with a base station of a mobile telecommunication system, wherein it includes the step of: forming a word, said transmitted word, the content of which is representative of the number of ... 06/15/06 - 20060126710 - Method for measuring locking time and frequency error in rf receiver A method is provided for measuring the locking time of an RF receiver. The method comprises inputting to the RF receiver an input sine wave with a certain frequency difference relative to the system operation frequency. An oscilloscope is used to capture the analog I and Q output signal of ... 06/08/06 - 20060120444 - Data-dependent jitter (ddj) calibration methodology The present subject matter relates to methodologies for providing error correction compensation to measurement systems. Data-dependant jitter may be compensated by examining both short-term and long-term bit histories after applying a predetermined synthesized calibration pattern having selected characteristics to the measurement system. Neural networks may be provided to produce error ... 05/25/06 - 20060109895 - Transmission system, signal receiver, test apparatus and test head There is provided a transmission system for transmitting a transmission signal, having a periodic clock output section for outputting a periodic clock having a preset period, a transmitting section for transmitting the transmission signal in synchronism with the periodic clock and a receiving section for receiving the transmission signal transmitted ... 04/27/06 - 20060088084 - Method and arrangement for channel simulation A method and arrangement for simulating a radio channel. In the solution, a channel having paths is simulated and the delay of each path is formed separately with a low-resolution delay arrangement and a high-resolution delay arrangement in such a manner that the simulated delay of each path is the ... 03/30/06 - 20060067392 - Method and apparatus for measuring the input frequency response of a digital receiver A frequency response measurement circuit includes a generation circuit operative to provide an input signal having a voltage and programmable frequency characteristics in response to a frequency control signal. A decision circuit is coupled to the generation circuit and is operative to sample the input signal at predetermined intervals in ... 03/30/06 - 20060067391 - Methods and systems for margin testing high-speed communication channels A receiver includes simple, effective margining circuitry to support manufacturer and in-situ margin testing of high-speed communication channels. The receiver includes an input pad coupled to a termination resistor and the input of a sampler. An internal or external current source alters the current through the termination resistor to vary ... 03/30/06 - 20060067390 - Method and apparatus for measuring jitter A system and method for characterizing the jitter of a periodic signal. Samples of the signal are taken with a sampling device. A set of samples representing a particular value of the signal in multiple cycles of the periodic signal is collected. Those values are formed into a histogram. The ... 03/16/06 - 20060056500 - Signal conditioning arrangement and method of conditioning a signal A signal conditioning arrangement includes a sensor arrangement for sensing a measured quantity and for outputting an output signal having a first or a second logical signal state based on the measured quantity, and means for generating an evaluating impulse if the logical signal state of the output signal does ... 03/02/06 - 20060045175 - Method and apparatus use re-sampled tie records to characterize jitter in a digital signal Measurement of jitter in a system uses a digital test sequence comprising many repetitions of a test pattern. An Acquisition Record is made of the entire test sequence. A complete Time Interval Error Record is made of the Acquisition Record. The complete TIE Record is separated into a collection of ... 02/16/06 - 20060034361 - Method and apparatus for eliminating cross-channel interference, and multi-channel source separation method and multi-channel source separation apparatus using the same A method and apparatus for eliminating cross-channel interference, and a multi-channel source separation method and a multi-channel source separation apparatus using the same. The multi-channel source signal separation apparatus includes: a source separation unit separating multi-channel source signals from a mixture including the multi-channel source signals; and a post-processing unit ... 02/02/06 - 20060023778 - Method of determining jitter and apparatus for determining jitter In accordance with illustrative embodiments, methods and apparati, which determine jitter are described. In one example embodiment, a method includes receiving a signal, wherein the signal comprises a first data pattern which was generated at a first bit rate. The method also includes sampling the signal at a second bit ... 01/19/06 - 20060013294 - Repeat digital message transmission between a microprocessor monitoring circuit and an analyzing tool The invention concerns a method for transmitting digital messages through output terminals (22) of a monitoring circuit (18) incorporated in a microprocessor (12) during execution of a series of instructions, the digital messages representing characteristic data stored by the monitoring circuit upon detecting a specific event in the execution of ... 01/12/06 - 20060007993 - Threshold setting using piecewise linear approximation for channel diagnostic systems A method and apparatus for detecting faults in cables. The invention comprises computing a plurality of thresholds representing a corresponding plurality of values of reflections in the cable; comparing a received reflection to a given threshold; if the received reflection value is greater than the given threshold value, then determining ... 01/12/06 - 20060007992 - Echo canceller gain control for channel diagnostic systems A method and apparatus for detecting faults in cables. The method and apparatus comprise receiving a reflected signal; multiplying an estimation of the reflected signal from an echo canceller by a predetermined gain factor; subtracting the value obtained as a result of the multiplication from the received reflected signal; and ... 01/12/06 - 20060007991 - Channel fault detection for channel diagnostic systems A method and computer program product for detecting faults in cables. The invention comprises receiving a first reflected signal; comparing the first reflected signal amplified with a first predetermined receiver gain setting with a first threshold; if the value of the amplified first reflected signal is greater than the value ... 12/15/05 - 20050276321 - Circuit for pll-based at-speed scan testing A scheme for PLL-based at-speed scan testing in which a clock generation circuit is used to generate different clock signals to scannable flip-flops of an integrated circuit. When the integrated circuit is under at-speed scan test mode of operation, the clock generation circuit receives a scan-clock signal to scan in ... 12/08/05 - 20050271131 - System and method for generating a jittered test signal A multi-speed jittered signal generator (216, 400) that generates a full-speed jittered signal (404) by scaling a low-speed jittered signal (420) using a frequency scaler (428). The low-speed jittered signal is created by injecting a modulation signal (416) into a reference signal (412) using a jitter injector (432). Injecting jitter ... 12/08/05 - 20050271130 - Signal analyzer for detecting distortions in signals A signal analyzer system comprises a differential operator configured to receive at least one input signal, and to determine at least one locus based on instantaneous differences in a relative rate of change between the at least one input signal and the at least one input signal's at least one ... 12/01/05 - 20050265437 - Communication channel calibration with nonvolatile parameter store for recovery A communication channel is operated by storing a calibrated parameter value in nonvolatile memory during manufacturing, testing, or during a first operation of the device. Upon starting operation of the communication channel in the field, the calibrated parameter value is obtained from the nonvolatile memory, and used in applying an ... 11/03/05 - 20050243906 - Test device and setting method A testing apparatus for testing a device under test is provided, wherein the testing apparatus includes: a comparator for receiving a signal output from the device under test and converting the signal into a logic signal by comparing the signal with a first reference voltage; a driver for amplifying a ... 11/03/05 - 20050243905 - Bounding box signal detector A description of signal behavior in the vicinity of a time and voltage of interest is produced by defining a region in the (time, voltage) plane that is a closed straight sided figure whose vertices are identified by threshold crossings offset for the voltage of interest and clocked by time ... 10/27/05 - 20050238093 - Circuit and method for evaluating the performance of an adaptive decision feedback equalizer-based serializer deserializer and serdes incorporating the same A circuit and method for evaluating serializer deserializer (SERDES) performance that is particularly advantageous when the SERDES has a decision feedback equalizer (DFE). In one embodiment, the circuit has a data processing path and an operational feedback loop coupled to said data processing path and containing an equalizer, perhaps a ... 10/27/05 - 20050238092 - Method and system for error estimation for adaptive equalization in communication systems A system and method for in a communication system is provided. The system includes logic for obtaining a symbol width by examining transition bit values for at least three symbols, wherein if the transition bit values are of same polarity as a central data symbol then the symbol width is ... 10/20/05 - 20050232345 - Histograms, trends and spectrums of random and deterministic jitter For a jitter measurement product histograms, trends and spectrums of random and deterministic jitter components are provided on a jitter component basis rather than just on overall jitter. At each stage of the jitter separation histograms, time trends (measurement vs. time), cycle trends (measurement vs. cycle or UI) or spectrums ... 09/15/05 - 20050201452 - Signal detector This invention includes a Clock Signal Detector and a Data Signal Detector. The Clock Signal Detector is designed to utilize a combination of a signal converter, rectifying-filtering circuit, and an inverter to prevent undetected signal interruption. With which, when a Clock signal interruption occurs that causes the signal converter and ... 09/01/05 - 20050190829 - Phase calibrating apparatus and method thereof A phase calibrating apparatus applied in a mixer includes a signal generator outputting a first signal and a second signal. The first signal has a phase differing by a phase value from the second signal. The phase calibrating apparatus is used to adjust the phase value to a predetermined value. ... 09/01/05 - 20050190828 - System and method for detecting cable faults for high-speed transmission link A system and method of detecting a fault in a transmission link are provided which includes providing a selectable reference level according to one of a direct current (DC) mode threshold and an alternating current (AC) mode threshold, wherein the DC mode threshold is a fixed potential and the AC ... 08/25/05 - 20050185708 - Apparatus for measuring jitter, method of measuring jitter and computer-readable medium storing a program thereof A jitter measurement apparatus for measuring the jitter of a signal-under-test includes a squarer for obtaining a squared signal which results from raising the signal-under-test to the 2N-th power (N is a positive integer) and a timing jitter estimator for obtaining a timing jitter sequence of the signal-under-test based on ... 08/25/05 - 20050185707 - Method and system for antenna selection diversity with minimum threshold Methods and systems for selecting at least one signal path are disclosed. Aspects of the method may comprise determining a signal quality metric for each of a plurality of signal paths and assigning a threshold signal quality metric for the plurality of signal paths. A signal path may be discarded ... 07/28/05 - 20050163204 - Method and apparatus for measuring jitter In a method for measuring jitter, a signal under test is inputted to generate signal transition locations. A signal transition location is latched using a sampling clock signal, and the signal transition location is converted to a delay value. The delay value is converted to an edge position output, and ... 07/14/05 - 20050152443 - Reset circuit and reset method A reset circuit and a reset method are provided in order to operate a power switch of the main body of a communication device installed in an inaccessible place such as a remote place or a high-altitude place and to execute a reset by software in the case of having ... 06/16/05 - 20050129104 - Testing apparatus and testing method A testing device for testing an electronic device is provided. The testing device includes: a deterministic jitter application unit for applying deterministic jitter to a given input signal without causing an amplitude modulation component and supplying the input signal with the deterministic jitter to the electronic device; a jitter amount ... 06/09/05 - 20050123031 - System and method for detecting anomalies along telecommunication lines An anomaly detection system comprises an echo canceler and anomaly detection logic. The echo canceler has a plurality of taps respectively associated with a plurality of tap coefficients. The anomaly detection logic is configured to determine a difference between a new tap coefficient associated with one of the taps and ... 06/02/05 - 20050117634 - Spectrum measurement system comprising pc and power meter The present invention is to provide a spectrum measurement system, which comprises a preamplifier for receiving input signals from a wireless communication device to be measured and pre-amplifying the same; a down converter coupled to the preamplifier for decreasing a frequency of the amplified signals to an IF; an IF ... ### FreshPatents.com Support |