127 results about "Cable tester" patented technology

A physical layer module (PHY) of a network device includes a control module and a cable-test module. The control module selectively generates a cable-test enable signal to test a cable including four pairs of twisted wire. The cable-test module tests the cable based on the cable-test enable signal. The cable-test module transmits test signals on the four pairs at a first time and receives return signals. The cable-test module determines that the cable is not faulty when the return signals received on first and second pairs of the four pairs have an amplitude less than a first predetermined amplitude, and when the return signals received on third and fourth pairs of the four pairs have an amplitude greater than a second predetermined amplitude and are received substantially contemporaneously.

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 input/output terminal and the cable medium. A cable tester tests the cable medium and determines a cable status. An indicator communciates with the physical layer device and identifies at least one of link presence, link abscence, link activity, link duplex and or link speed of the first input/output terminal during normal operation. The cable tester also uses the indicator to indicate at least one of cable testing status during the test and/or the cable status after the test.

A cable tester tests cable and determines a cable pass/fail status. A pretest module senses activity on the cable and selectively enables testing based on the sensed activity. A test module is enabled by the pretest module, transmits a test pulse on the cable, measures a reflection amplitude, and calculates a cable length. The cable status includes an open status, a short status, and a normal status. The test module determines the cable status of the cable based on the cable at least one of passing and failing A out of B cable tests. The test module determines the cable status for each of the B tests based on the measured amplitude and the calculated cable length.

An integrated cable tester detects cable faults by coupling a single cable to host and expander connectors of an interface module and determining whether each of plural ports of the connectors has an associated PHY Ready signal. An LED interfaced with the cable tester illuminates to indicate a normal cable and fails to illuminate if the cable tests faulty. In one embodiment a module tester determines whether the module has degraded performance when a single cable is detected as coupled to the host and expander connectors of the module. The module tester clears the interface module's error log and initiates a reset of communication between the host and expander ports. Upon completion of the reset, such as detection of all PHY Ready signals for the plural ports, the module tester reads the error log and indicates errors as degrading the performance of the interface module.

The utility model provides a fault testing proposal over network cables. Wider differential detection pulses are sent out from a testing end. When encountering a break point on the cable, the detection pulses are reflected, and the reflected pulses are transmitted back to the sending end along the cable. The sending signal and the reflected signal are mutually superposed, and the time interval between the sending and reflected signals is calculated by measuring the time width of the superposed part; then the position and cause of the failure can be analyzed out. The proposal in the utility model also provides a relevant network cable tester. Four pairs of twisted network cables can be tested just by connecting any end of the network cable with the tester. The tester in the utility model has advantages of simple operation, high resolution and negligible environmental impact. Beside application in network cable fault testing, the testing proposal and device in the utility model can be also used in coaxial cable fault testing.

A physical layer device comprises a first transceiver that selectively communicates with a cable medium. A detector detects a power over Ethernet (POE) device. A switching device selectively provides power from a power supply over the cable medium when the detector detects the POE device. A cable tester communicates with the first transceiver, tests the cable medium and determines a cable status, and delays testing of the cable medium when the detector detects the POE device until the switching device provides the power.

The present invention provides a device to detecting cable which comprises of controller, man-machine interface of I/O interface of controller and measuring module, also comprises of driver of I/O interface of controller, manipulator connected with driver, and measuring probe connected with manipulator. Controller and measuring module communicate with measuring probe by switch, and manipulator is 3-DOF manipulator. The problems that efficient of manual testing in background techniques is low, precision is bad, and cost is high because of testing system is used in a few testing are resolved. The present invention is used for detecting cable device or device connected with cable in process of research, produce, detection, usage and maintains, especially for detecting cable with different capability and specification in laboratory.

The invention discloses an automatic detection switchover system for a cable. The system is a necessary detection channel connected between the cable to be detected and a channel controller (CHC) cable tester; the system consists of a universal switchover cable, a cable detection switchover box and a special switchover cable; and an output connector of special specification on the CHC cable tester is in transition switchover to the cable detection switchover box through the universal switchover cable, the special switchover cable is connected with the cable detection switchover box and the cable to be detected, and the cable detection switchover box is connected with the universal switchover cable and the special switchover cable respectively. The system greatly simplifies the complexity of switchover operation during automatic cable detection in an enterprise with high cable processing number, improves the cable detection efficiency, has extremely strong universality, can be adaptive to cable detection of any form, lightens the operation intensity of detection personnel, meanwhile, ensures accuracy and safety of the cable detection, and has good application prospect.

A physical layer device includes a cable tester that determines a cable status. A test module transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A first digital signal processor (DSP) communicates with a first pair of the cable and includes a first echo canceller having a finite impulse response (FIR) filter with taps and a first crosstalk canceller having a FIR filter with taps. A second DSP communicates with a second pair of the cable and includes a second echo canceller having a FIR filter with taps and a second crosstalk canceller having a FIR filter with taps. The cable tester calculates a distance to at least one of echo and crosstalk based on values of the taps of the first echo canceller and the second crosstalk canceller.

The methods and apparatus described herein are designed and configured to allow one user to test cable continuity using a wire-configurable directional connector. The methods and apparatus may transmit a first and second voltage pulse through a first and second wire of a cable under test, respectively, having a wire-configurable directional connector attached. Both voltage pulses travel through the wire-configurable directional connector. The first voltage pulse selectively leaves at least one of the second wire and a third wire of the cable under test and the second voltage pulse selectively leaves the third wire. The methods and apparatus may store a pre-determined pattern of a returning voltage pulse specific to the cable under test, and determine a state of the first, second, and third wires in response to receiving the first and second voltage pulses.

A method for detecting failures in electrical cable assemblies is provided. A cable test instrument obtains frequency domain data representing electrical characteristics of a cable link under test. A number of connectors in the cable link under test is determined based on the obtained frequency domain data. An estimated location of each of the connectors along the length of the cable link under test is determined by the cable test instrument. The connectors are ranked in accordance with their respective contribution to detected failures in the cable link under test.

The invention relates to a tester, in particular to a multi-core cable tester. The invention aims to provide a multi-core cable tester which ensures the accuracy of the testing result and outputs the testing result from a liquid crystal screen and a printer. The multi-core cable tester mainly comprises three parts: an input circuit, an output circuit and a control circuit, wherein the input circuit comprises a keyboard circuit, an insulation test circuit, an A/D conversion circuit and an on-off test circuit; the output circuit consists of a CPLD system circuit, an LCD liquid crystal display module, a printer, a relay group and a 500V DC high-voltage circuit; the control circuit consists of a 8051 single-chip microcomputer system circuit; and the output end of the input circuit is connected with the input end of the control circuit, and the input end of the control circuit is connected with the input end of the output circuit.

A physical layer device communicates over a cable and includes a cable tester that determines a cable status. The cable tester includes a pretest module that senses activity on the cable. A test module transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A first digital signal processor (DSP) communicates with a first pair of the cable and includes a first echo canceller and a first finite impulse response filter with first taps. A second DSP communicates with a second pair of the cable and includes a second echo canceller and a second finite impulse response filter with second taps. At least one of the physical layer device and the cable tester estimates skew between the first and second pairs based on values of the first and second taps.

The invention provides a collector ring rotating state electrical performance detecting device. The device comprises a dedicated rotating device, a rotating table control device, adaptive cables, a direct-current voltage-stabilized power source and a cable tester. The rotating table control device controls the dedicated rotating device to drive a detected collector ring to rotate, a rotor and a stator of the detected collector ring are respectively connected to the cable tester through the adaptive cables, and the dedicated rotating device comprises a detected collector ring fixing device, a detected collector ring through-connection device, a plurality of sets of lifting rod components controlling the detected collector ring to ascend and descend, and a rotating table. The detected collector ring through-connection device is coaxially fixed to the rotating table, one ends of the lifting rod components are fixed to the rotating table, and the lifting rod components are circumferentially and evenly distributed on the rotating table, the other ends of the lifting rod components are fixedly connected with the detected collector ring fixing device, and the detected collector ring fixing device is coaxial with the detected collector ring through-connection device. The collector ring rotating state electrical performance detecting device is simple in structure, facilitates instrument erecting, and is convenient to operate and high in detection precision.

A cable testing system employs a cable tester and a multi-jack cable adapter, which includes a switch matrix and a switch controller. In operation, the switch matrix is in electrical communication with the cable tester and a plurality of cables to establish a plurality of signal paths between the cable tester and the plurality of cables, and the switch controller is in electrical communication with the switch matrix and the cable tester to control a switching of each signal path by the switch matrix between an activated state and a deactivated state as commanded by the cable tester.

A rapid visual fiber optic cable tester for visually inspecting optical continuity and attenuation of multiple strand fiber optic cable connectors through an existing fiber optic adapter panel, comprising: an enclosure having a uniform visual light source in a visible spectrum wavelength range to provide a uniform visual light pattern on a transparent screen; an electrical power source for powering the uniform visual light source; a power button for controlling the electrical power source; whereby the rapid visual fiber optic cable tester is positioned toward the existing fiber optic adapter panel at one end of the multiple strand fiber optic cable without a direct contact with the connectors; while observing visually at the other end of the cable through existing fiber optic adapter panel for any difference in light intensity between each fiber optic strand; therefore visually detecting optical continuity and attenuation by light intensity levels instantly and rapidly.

This invention relates to a cable tester which comprises a signal source, an input port, a signal receive unit, a CPU to control the signal source to unique send one-way effective signal and the receive unit to receive and test the signal and send the result to the output unit, and a result output unit also controlled the CPU to display the test result. This invention overcomes the defects in prior art.

The invention relates to a transmitting box of a cable tester, in particular to a transmitting box, and overcomes the defects of high work load, high working fineness, and high possibility of missing connecting and falsely connecting cables during replacement of the cables in the testing process. The transmitting box of the cable tester comprises a box body; the transmitting box of the cable tester is characterized by also comprising 2n fixed end electric connectors and multicore leads with insulating spacer layers; n window holes are formed on a front panel and a back panel of the box body respectively; the fixed end electric connectors are fixed in the window holes through fixing discs of the fixed end electric connectors; conductive contacts of the fixed end electric connectors are sequentially connected with single core leads arranged in the multicore leads with the insulating spacer layers according to the sequence of pins; n fixed end electric connectors fixed on the front panel are sequentially electrically connected with n fixed end electric connectors fixed on the back panel through the multicore leads with the insulating spacer layers, wherein n is an integer more than 1. By application of the product of the invention, the phenomena of missing connecting and falsely connecting the cables during replacement of the cable are avoided. The transmitting box of the cable tester is applied to cable testing.

The invention relates to a mining communication cable tester and aims to provide a communication cable testing device which has the advantages of a simple structure, convenient operations and a high automation degree. The mining communication cable tester provided by the invention comprises a central processor, a relay strobe unit, an on-off testing device, an insulated resistance testing device, an input unit and a display screen. A control signal output end of the central processor is connected to a control signal receiving end of the relay strobe unit; a control signal output end of the relay strobe unit is respectively connected to control ends of the on-off testing device and the insulated resistance testing device; testing ends of the on-off testing device and the insulated resistance testing device are respectively connected to a testing end of the input unit; testing signal output ends of the on-off testing device and the insulated resistance testing device are respectively connected to a testing signal receiving end of the central processor; and a testing signal output end of the central processor is connected to a signal receiving end of the display screen.