|
Match
|
Document |
Document Title |
|
|
7622930 |
Method for inspecting transmission line characteristic of a semiconductor device using signal reflection measurement
A method for inspecting a semiconductor device includes establishing a first circuit state in which electrical conduction through at least one of branch transmission line portions is established...
|
|
|
7589535 |
Network device detection using frequency domain reflectometer
A system for identifying elements in a cable network utilizing frequency domain reflectometry includes initial filtering stages to remove noise, second and third harmonics and side lobes, and...
|
|
|
7576548 |
Cable tester
A physical layer device includes a cable tester that determines a cable status of a cable and that includes a test module. The test module transmits a test pulse on the cable, measures a reflection...
|
|
|
7561980 |
Transmission medium testing apparatus and method
The invention provides a method for testing a transmission medium used in a full-duplex communication system comprising an endpoint that comprises a transmitting end (TX) and a receiving end (RX);...
|
|
|
7548799 |
Powered device including a detection signature resistor
A method is provided that includes receiving a detection voltage at a powered device from a powered network, applying the detection voltage to an external resistor to provide a detection signature...
|
|
|
7548071 |
Reflectometry test system using a sliding pseudo-noise reference
A technique for reflectometry testing of a signal path is disclosed. The technique includes injecting a test signal based on a probe pseudo-noise sequence into the signal path and obtaining a...
|
|
|
7548067 |
Methods for measuring capacitance
Methods for determining capacitance values of a metal on semiconductor (MOS) structure are provided. A time domain reflectometry circuit may be loaded with a MOS structure. The MOS structure may be...
|
|
|
7532011 |
Method and apparatus for time domain reflection test of transmission line
The present invention relates to a method and an apparatus for TDR (time domain reflection) test of a transmission line. In the method, first, a test signal meeting the test requirement of...
|
|
|
7439747 |
Location of high resistance ground faults on buried power-cables
The location of high resistance ground faults within buried co-axial power cables can be detected by transmitting a combined signal along the cable at a primary frequency of 0.718 Hz and a primary...
|
|
|
7411403 |
Electrical switching apparatus and method employing active acoustic sensing to detect an electrical conductivity fault of a power circuit
A circuit breaker detects a loose electrical connection condition of a power circuit. The circuit breaker includes first and second lugs, first and second acoustic couplers acoustically coupled to...
|
|
|
7400151 |
Connector crosstalk and return loss cancellation
A device for testing data communications cabling. The device consists of a signal generator that can generate a test signal to test the data communications cabling and a receiving component that...
|
|
|
7383133 |
Diffuse seismic imaging systems and methods
Systems and methods are disclosed to construct subsurface images from diffuse seismic energy. Various disclosed system embodiments include multiple seismic sensors that each convert received...
|
|
|
7375602 |
Methods for propagating a non sinusoidal signal without distortion in dispersive lossy media
Systems and methods are described for transmitting a waveform having a controllable attenuation and propagation velocity. An exemplary method comprises: generating an exponential waveform, the...
|
|
|
7312613 |
Method for network diagnostic
A method for network diagnosis between a source end and a destination end coupled by a transmission line is provided. The method includes the following steps. First, a first test signal is...
|
|
|
7307428 |
Method for single ended line testing and single ended line testing device
A single ended line testing method for qualifying an electrically conducting line, including the steps of sending a plurality of randomized excitation signals from a first end of the line towards a...
|
|
|
7295018 |
Correction of loss and dispersion in cable fault measurements
A method of correcting distortions resulting from loss and dispersion in cable fault measurements. A cable is measured in the frequency domain to obtain a reflected response. Fractional sinusoidal...
|
|
|
7282922 |
Wire network mapping method and apparatus using impulse responses
A method and apparatus for mapping a wire network is disclosed. The method includes obtaining a reflectometry test signal of the wire network. An estimated network impulse response is estimated...
|
|
|
7271596 |
Method and system for testing a signal path having an operational signal
A technique for testing a signal path while an operational signal is present is disclosed. The technique may be performed without injecting a test signal into the signal path by using an...
|
|
|
7250772 |
Method and apparatus for characterizing a signal path carrying an operational signal
A method of characterizing a signal path includes (i) generating a reference spread-spectrum signal; (ii) coupling the reference spread-spectrum signal into the signal path while the signal path is...
|
|
|
7245129 |
Apparatus for and method of cable diagnostics utilizing time domain reflectometry
A novel mechanism for performing high accuracy cable diagnostics. The mechanism utilizes time domain reflectometry (TDR) to detect and identify cable faults, perform estimations of cable length,...
|
|
|
7212008 |
Surveillance device detection utilizing non linear junction detection and reflectometry
An apparatus for detecting concealed surveillance devices coupled to a transmission line uses either a time domain or frequency domain reflectometry operation to locate any impedance anomalies on...
|
|
|
7196529 |
Systems and methods for testing conductive members employing electromagnetic back scattering
A system or method of analyzing a conductive member for the presence an anomaly. A test source signal is applied to a first test location on the elongate conductive member remote from the corrosion...
|
|
|
7171322 |
Algorithm for estimation of multiple faults on a transmission line or waveguide
An algorithm is provided for a frequency domain reflectometer which takes into account both attenuation per unit length of transmission line and phase shift per unit length of transmission line in...
|
|
|
7164274 |
Cable diagnostics using time domain reflectometry and applications using the same
A system and method are used to determine connectivity and/or cable faults of a cable. A signal transmitting and receiving system is coupled to the cable. An analog-to-digital converter (ADC)...
|
|
|
7135873 |
Digital time domain reflectometer system
A digital time domain reflectometer system is provided for performing a measurement process that is useful for calculating a cable length. The measurement process starts with a launch controller...
|
|
|
7120563 |
Wire fault detection
Described are techniques used in a wire diagnostics system to detect events, such as defects, that may occur within a wire or cable under test. An incident voltage signal is sent out on the wire...
|
|
|
7119546 |
Method for single ended line testing and single ended line testing device
The present invention relates to a single ended line testing method for qualifying an electrically conducting line. This method includes the steps of sending a plurality of excitation signals from...
|
|
|
7116111 |
System and method for providing a time varying gain TDR to display abnormalities of a communication cable or the like
In a system and method for testing and displaying the abnormalities, includes opens, shorts, bridged-taps and wet sections, of a copper pair line for xDSL service use, the abnormalities are...
|
|
|
7106071 |
Cable diagnostics using time domain reflectometry and applications using the same
A system and method are used to determine connectivity and/or cable faults of a cable. A signal transmitting and receiving system is coupled to the cable. An analog-to-digital converter (ADC)...
|
|
|
7068042 |
Method and apparatus for monitoring integrity of wires or electrical cables
An apparatus for monitoring the integrity of a wire is provided, which includes a TDR instrument for generating a pulse waveform for transmission through the wire. The apparatus also includes a...
|
|
|
7012436 |
Cable tester
A physical layer device is adapted to communicate with a cable medium and communicates with an indicator. The physical layer device includes a first input/output terminal, a first transceiver that...
|
|
|
7005862 |
Method and apparatus for measuring electric characteristics of cable assembly, and computer product
A propagation delay time of a cable assembly is measured by calculating a half of a time difference between a branch point of time-dependent variations of amplitude of reflection coefficient...
|
|
|
7005861 |
Cable tester
A physical layer device is provided that includes an autonegotiation circuit that negotiates a link with a link partner at first and second link speeds. The physical layer device also includes a...
|
|
|
6995551 |
Cable tester with insertion loss estimator
A physical layer device including a first port, a second port, and a cable that has one end that communicates with the first port and an opposite end that communicates with the second port. A cable...
|
|
|
6980007 |
Cable tester with insertion loss and return loss estimators
A physical layer device that communicates over a cable comprises a cable tester that determines a cable status, which includes an open status, a short status, and a normal status. The cable tester...
|
|
|
6977507 |
Cable tester with indicator
A system comprises a physical layer device that is adapted to communicate with a cable medium and that includes a first input/output terminal. A first transceiver communicates with the first...
|
|
|
6959037 |
System and method for locating and determining discontinuities and estimating loop loss in a communications medium using frequency domain correlation
A system for determining characteristics associated with a communication channel includes a transmitter for transmitting a first signal via the communication channel. The system includes a receiver...
|
|
|
6954076 |
Aircraft multi-function wire and insulation tester
An aircraft multi-function wire and low voltage insulation tester, having a time domain reflectometer, a digital multi-meter, and a matrix switch integrated in a computer, and a connector having a...
|
|
|
6943557 |
System and method for providing a time varying gain TDR to display abnormalities of a communication cable or the like
In a system and method for testing and displaying the abnormalities, includes opens, shorts, bridged-taps and wet sections, of a copper pair line for xDSL service use, the abnormalities are...
|
|
|
6937030 |
Testing electrical integrity of electrically heated subsea pipelines
Method is provided for testing electrically heated subsea pipelines that are “electrical-ready,” that is, equipped for applying electrical power when it is needed for heating the pipeline at...
|
|
|
6934655 |
Method and apparatus for transmission line analysis
A method and system for performing sequence time domain reflectometry to determine the location of line anomalies in a communication channel is disclosed. In one embodiment, the system generates a...
|
|
|
6882161 |
Method of measuring dielectric constant of PCB for RIMM
Disclosed herein is a method of measuring a dielectric constant of a Printed Circuit Board (PCB) for a Rambus Inline Memory Module (RIMM), which includes the steps of measuring a length of a Rambus...
|
|
|
6867597 |
Method and apparatus for finding a fault in a signal path on a printed circuit board
In the case of the present-day trend of miniaturizing housed electronic devices, there is the problem that the contact spacings between the terminal pins becomes smaller and smaller and are no...
|
|
|
6865256 |
Method and apparatus for determining properties of a transmission channel
The invention concerns a time domain reflectometry method for estimating properties of a transmission channel, for instance a channel for transmitting electric or acoustic signals. This method...
|
|
|
6862546 |
Integrated adjustable short-haul/long-haul time domain reflectometry
A method and system for performing integrated adjustable short-haul/long-haul time domain reflectometry (TDR). A TDR pulse count is set to a predetermined number. Next, a TDR pulse is transmitted...
|
|
|
6859041 |
Methods for locating faults in aircraft branch conductors and determining the distance to the faults
A method for isolating a fault in an aircraft circuit having a lead conductor and a plurality of branch conductors coupled to the lead conductor is disclosed. The method includes coupling a...
|
|
|
6856138 |
Time-domain reflectometer for testing terminated network cable
A time domain reflectometer having a first impedance when in a first test mode and a second impedance when in a second test mode. The first impedance is substantially the same as the nominal...
|
|
|
6853196 |
Method and apparatus for electrical cable testing by pulse-arrested spark discharge
A method for electrical cable testing by Pulse-Arrested Spark Discharge (PASD) uses the cable response to a short-duration high-voltage incident pulse to determine the location of an electrical...
|
|
|
6847267 |
Methods for transmitting a waveform having a controllable attenuation and propagation velocity
Systems and methods are described for transmitting a waveform having a controllable attenuation and propagation velocity. An exemplary method comprises: generating an exponential waveform, the...
|
|
|
6842011 |
Method and apparatus for locating impedance mismatches in a radio frequency communication system
A communication system uses a reflected signal to determine the location of an impedance mismatch along a transmission path. The system provides a forward signal through the transmission path, and...
|