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| Number | Title | Issue Date |
| 8067946 | Method for repairing a transmission line in an electrical power distribution system The invention provides a faulted circuit indicator apparatus with transmission line state display, as well as methods for using the apparatus. The faulted circuit indicator has a sensor that can be electrically coupled to an electrical conductor for collecting data ... | 11/29/2011 |
| 8026726 | Fault testing for interconnections Embodiments of the invention are generally directed to fault testing for interconnections. An embodiment of a fault analysis apparatus includes a test pattern source to provide a test pattern for an interconnection between a transmitter and a receiver, the interconn... | 09/27/2011 |
| 7977951 | Methods and apparatus for measuring a length of a cable A first physical layer (PHY) device includes an auto-negotiation module, a first cable-length measuring module, and a first control module. The auto-negotiation module exchanges data rates of the first PHY device and a second PHY device. The first PHY device is conn... | 07/12/2011 |
| 7952362 | Device for measuring the loss factor A device for measuring the loss factor and/or measuring the phase angle between a voltage and a current and/or recording a voltage decay and/or current decay and/or recording partial discharge processes and/or measuring the propagation time on test objects that are ... | 05/31/2011 |
| 7880476 | Method to and apparatus for detecting and locating a fault in an electrical conductor wire The present invention provides a new technique for solving the problem of detecting and locating soft faults, such as frays, in electrical conductor wires. This new technique utilizes the nonlinear ferroelectric capacitive properties of piezoelectric ceramic element... | 02/01/2011 |
| 7855563 | Robust cable connectivity test receiver for high-speed data receiver A system is provided for detecting a fault in a signal transmission path. In one embodiment, the system can include a variable amplitude signal attenuator which is operable to modify an input signal by variably attenuating a signal voltage swing of the input signal.... | 12/21/2010 |
| 7808249 | Methods and apparatus for measuring a length of a cable A physical layer (PHY) device of a network device includes a first module, a first cable-length measuring (CLM) module, and a first control module. The first module determines whether a remote PHY that communicates with the PHY device over a cable is capable of meas... | 10/05/2010 |
| 7701224 | Wire abnormality detecting device A sensor switch 111a connected to a constant voltage Vc via a breeder resistor 114a and dropper diodes 112a and 113a is connected to a microprocessor 120 that configures a wire abnormality detecting devi... | 04/20/2010 |
| 7683629 | Circuit tester device A circuit tester in the form of a pliers includes first and second jaws with first and second probes respectively for engaging a wire to confirm circuit continuity and polarity. The probes are electrically connected in series with a bipolar or two color, light emitt... | 03/23/2010 |
| 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 amplitude, calculates a cable length, and determines the cable statu... | 08/18/2009 |
| 7548070 | Method and circuit arrangement for detecting a wire break A method and a circuit are provided for the continuous detection of a line break in a full bridge controlling an inductive load. When the full bridge is switched off or on, a pre-determinable switching device of the circuit is switched first, and then a potential ap... | 06/16/2009 |
| 7443172 | Method and apparatus for the location and indication of cable splices and cable faults A method and apparatus for the location and indication of cable splices and cable faults is disclosed. An audio frequency generator can be coupled to a cable under test and the magnetic field generated by the cable can be monitored by a receiver. A receiver includes... | 10/28/2008 |
| 7437934 | Self-contained apparatus for inspection of electric conductors A self-contained apparatus for inspecting energized and de-energized conductors. The apparatus includes a housing, at least one transmitter contained within the housing for generating and impinging pulses onto an electrical conductor, such that the pulses travel thr... | 10/21/2008 |
| 7427867 | Method and system for non-destructive evaluation of conducting structures Method and system for non-destructive evaluation for a conducting structure by measuring the electrical impulse response thereof including applying a PRBS test input signal to the conducting structure, detecting an output signal from the conducting structure and pro... | 09/23/2008 |
| 7414416 | Electrical condition monitoring method for polymers An electrical condition monitoring method utilizes measurement of electrical resistivity of an age sensor made of a conductive matrix or composite disposed in a polymeric structure such as an electrical cable. The conductive matrix comprises a base polymer and condu... | 08/19/2008 |
| 7406545 | Disk drive or any serial attached device logging a cable loss event An information storage device is disclosed (such as a disk drive) comprising an interface for connecting to a host through a cable, and control circuitry for communicating with the host over the cable by executing a communication process. The communication processes... | 07/29/2008 |
| 7403018 | Cable tester A cable tester that tests cable and that determines a cable status includes a pretest module that senses activity on pairs of the cable and that selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, transmits a tes... | 07/22/2008 |
| 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 can receive a reflected signal produced by reflection of the test signa... | 07/15/2008 |
| 7391220 | Method and device for detecting defects of electromagnetic protection for electric harnesses A method and device for detecting defects of an electromagnetic protection for an electric harness (H). The device (D) includes elements (M1) for generating stimulating electric signals, elements (M2) for bringing the signals up to a predetermined powe... | 06/24/2008 |
| 7378853 | 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 ... | 05/27/2008 |
| 7375532 | Cable tester A physical layer device comprises a first port adapted to communicate with one end of a cable. A second port is adapted to communicate with an opposite end of a cable. A cable tester communicates with the first and second ports and selectively tests the cable to det... | 05/20/2008 |
| 7355412 | Remote fault monitoring system Remote indication devices are each a combination of electrical parameter measurement circuitry, a CPU, and a communication device. Each remote indication device is electrically or electromagnetically coupled to a power distribution circuit conductor to monitor the c... | 04/08/2008 |
| 7342400 | Method and apparatus for measuring employing main and remote units A test instrument employs main and remote test units at respective ends of a cable under test. The units operate in an active or passive measurement mode, wherein one of the units begins as the active unit, applying test signals to the cable under test to make a set... | 03/11/2008 |
| 7324913 | Methods and apparatus for testing a link between chips In a first aspect, a first method of testing a link between a first chip and a second chip is provided. The first method includes the steps of, while operating in a test mode, (1) transmitting test data of sufficient length to enable exercising of worst case transit... | 01/29/2008 |
| 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 transmitted from the transmitter to the receiver when the hybrid is set to a ... | 12/25/2007 |
| 7285948 | Method and apparatus providing single cable bi-directional triggering between instruments System and apparatus enabling the use of a single cable to communicate triggering information between each of a plurality of signal acquisition devices and, illustratively, an external trigger control unit. A combined tripper signal is produced only when each trippe... | 10/23/2007 |
| 7282921 | System, apparatus and method for detection of electrical faults System for monitoring an electrical system of a facility includes one or more local sensing devices, each of which is adapted to be connected to the electrical system of the facility in proximity to a respective load that receives power from the electrical system so... | 10/16/2007 |
| 7277822 | Embedded system for diagnostics and prognostics of conduits An apparatus providing a means for assessment of the integrity of insulated conduits, harnesses, cables, pipelines and other interconnection systems constructed with integral sensitized media, discrete sensors, and electronics providing a means for transforming sens... | 10/02/2007 |
| 7276913 | Cable tester A cable tester tests cable to determine a cable status. A mode selector selects one of a first operating mode and a second operating mode. A pretest module senses activity on the cable and selectively enables testing based on the sensed activity when in the first op... | 10/02/2007 |
| 7268562 | Low cost detectible pipe and electric fencing manufactured from conductive loaded resin-based materials Detectable pipe and electric fence are formed of a conductive loaded resin-based material. The conductive loaded resin-based material comprises micron conductive powder(s), conductive fiber(s), or a combination of conductive powder and conductive fibers in a base re... | 09/11/2007 |
| 7256727 | System and method for radiating RF waveforms using discontinues associated with a utility transmission line A method for processing radio frequency reflections is provided. The method applies an RF waveform to a transmission line that is a conductor used for providing a utility service. The method uses a RF waveform generator to transmit UltraWideband (UWB) RF waveforms t... | 08/14/2007 |
| 7250771 | Cable tester A cable tester comprises a test initiating module that performs B cable tests. Each of said B cable tests includes selectively transmitting a test pulse on the cable, measuring a reflection amplitude, and calculating a cable length. A test results module determines ... | 07/31/2007 |
| 7190172 | Cable tester A physical layer device includes first, second, third and fourth twisted pairs. First, second, third and fourth hybrid devices communicate with the first, second, third and fourth twisted pairs, respectively. First, second, third and fourth cable testers communicate... | 03/13/2007 |
| 7191079 | Oscilloscope having advanced triggering capability An advanced trigger circuit includes two trigger decoders, each triggering on one of respective pluralities of continuous-time trigger events. In one embodiment, a programmable timer begins timing in response to an output signal of the first trigger decoder and gene... | 03/13/2007 |
| 7187160 | Systems and methods for measuring an RMS voltage An embodiment of a method for measuring an RMS voltage of an arbitrary time-varying waveform includes: a) coupling said arbitrary time-varying waveform to said thermally sensitive device; b) decoupling said arbitrary time-varying waveform from said thermally sensiti... | 03/06/2007 |
| 7173431 | Cable tester A physical layer device communicates over a cable and includes a cable tester that determines a cable status, which includes an open status, a short status and a normal status. The cable tester includes a pretest module that senses activity on the cable and selectiv... | 02/06/2007 |
| 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 a modified Inverse Fourier Transform that converts a frequency domain... | 01/30/2007 |
| 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) coupled to the signal transmitting and receiving system. A TDR system coup... | 01/16/2007 |
| 7154281 | Apparatus and method for determining the status of an electric power cable An apparatus (100) and method (300) for determining the status of a electric cable (20) is provided. The apparatus (100) rigidly includes a probe (104) having coaxial contacts (150, 152) and including a melt unit (102... | 12/26/2006 |
| 7145345 | Current transformers for partial discharge detection on aircraft cables and wires A technique for detecting defects in aircraft wiring, such as for detecting partial discharges or arcing in wiring or cables is disclosed. A high frequency current transformer (HFCT) is fixingly positioned in contact with a wire so that the wire is encircled by the ... | 12/05/2006 |
