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8601328 Systems and methods for near-codeword detection and correction on the fly  
Systems and methods are provided for enhancing the performance and throughput of a low-density parity check (LDPC) decoder. In some embodiments, the enhanced performance and throughput may be...
7761764 System and method for self-test of integrated circuits  
A system and method for self-test of an integrated circuit are disclosed. As one example, an integrated circuit is disclosed. The integrated circuit includes a digital signal processing chain, a...
7751786 Method and apparatus for adaptively controlling signals  
A signal processing system according to various aspects of the present invention includes an excursion signal generator, a scaling system and a filter system. The excursion signal generator...
7689406 Method and system for measuring a system's transmission quality  
Method and system for measuring transmission quality of an audio transmission system under test. Specifically, an input signal (X), such as an original input speech signal, is applied to the audio...
7676707 Device and method for testing SAS channels  
A device and a method for testing SAS channels which are applied to a plurality of pairs of SAS interfaces. The testing device includes a control terminal, a PCI-E microprocessor, a PCI-E-to-SAS...
7617431 Method and apparatus for analyzing delay defect  
The apparatus for analyzing a delay defect of the present invention obtains the RC of the maximal incidence among region codes (RCs) to which check circuits detecting errors caused with gradual...
7539148 Circuit integrity in a packet-switched network  
Techniques for performing a continuity check operation include sending a pattern of bits over a packet network connection through a first interface on a packet network to a second interface on the...
7519002 Method of switching between multiple call signaling protocol stacks in a voice quality tester and apparatus using same  
A system and method to test voice quality over a call path on a packet based network. A call signaling path is established between a first voice quality tester (VQT) and a second VQT. The call...
7480839 Qualified anomaly detection  
A circuit and method of qualified anomaly detection provides detection and triggering on specific analog anomalies and/or digital data within a qualified area of a serial data stream. A start...
7471932 System and method for embedding OFDM in CDMA systems  
Systems and methods of combining OFDM and CDMA signals are provided. An OFDM packet data channel is overlaid over CDMA transmissions. The channel is scheduled slotwise between multiple users. In...
7320115 Method for identifying a physical failure location on an integrated circuit  
A method is disclosed for identifying a physical failure location on an IC without using layout-versus-schematic (LVS) verification tool. In the method, the integrated circuit is tested with one...
7299388 Method and apparatus for selectively accessing and configuring individual chips of a semi-conductor wafer  
A method and apparatus according to the present invention enable wafer chips to be configured with a single power on and off sequence and further enable a chip parameter to be adjusted during a...
7296209 Apparatus for encoding and decoding  
A communication device which executes proper communications by correcting communication errors caused by noise generated on a transmission line or the like. An encoding device for adding error...
7200691 System and method for efficient DMA transfer and buffering of captured data events from a nondeterministic data bus  
A system and method for efficient transfer and buffering of captured data events. The system includes data capture logic configured to capture data events from a nondeterministic data bus; a...
7155658 CRC calculation for data with dynamic header  
A method for performing CRC calculations on packets with dynamic headers is disclosed. The header may be changed during transmission across a network. When the header is changed, a CRC associated...
6950972 Multi-purpose BER tester (MPBERT) for very high RZ and NRZ signals  
A multi-purpose bit error rate tester (MPBERT) and a method of bit error rate (BER) testing of electrical and optical components and subsystems of electrical and optical communications systems is...
6941262 Poet assistant's graphical user interface (GUI)  
A method of providing a graphical user interface (GUI) in a poetry generation system including displaying a work space, receiving a user input to the word space and linking the user input to a...
6904550 Velocity enhancement for OFDM systems  
An orthogonal frequency division multiplexing (OFDM) transmitter method, consistent with certain embodiments of the present invention arranges OFDM data symbols representing data bits for...
6813741 Address counter test mode for memory device  
A memory having a circuit including a built-in address counter with a test mode. The address counter may be used to generate the memory array addressing for the different array test patterns. The...
6798830 Methods and apparatus for generating a test signal for xDSL devices  
A system, method and apparatus are disclosed for generating a test signal by selecting a set of frequencies for the test signal and selecting frequency sub-groups from the set of frequencies. The...
6640318 Continuity testing in communication networks  
A communication hub for providing continuity testing in communication networks. The communication hub comprises a processor coupled to an interface. The processor is configured to process a...
6584580 Processor and multiprocessor system  
For use in a multiprocessor system in which a plurality of processors share a main memory via a processor bus, an error processing unit (EU) that determines an error level is provided in each...
6563867 Arrangement for analyzing the nonlinear properties of a communication channel  
An arrangement to analyze the nonlinear properties of a communication channel that uses a test signal having a number of tones. The test signal is transmitted via the communication channel to be...
6499126 Pattern generator and electric part testing apparatus  
A pattern generator that generates a test pattern used for testing an electric part including: a pattern memory that stores test pattern information, which defines the test pattern; a vector...
6434716 Network link tester device configured to selectively and automatically couple to a network transmit pair line or a node transmit pair line of a LAN port and determine available operational modes  
A network link tester couples to a LAN port with the LAN port having both a network transmit pair and a node transmit pair line. The link detector scans the network transmit pair and node transmit...
5463633 Use of at commands to test modem with HP3065  
A modem is tested using HP3065 with AT commands. The modem is tested as a whole, thereby assuring that the correct components are being used and that they will work with one another.
5363493 Token ring network test device using finite state machine  
A system that monitors a local area network by receiving all messages transmitted over the local area network, and analyzing selected sequences of messages to determine if certain, architecturally...
5337306 Digital tandem channel unit interface for telecommunications network  
A digital tandem channel unit installable in an intermediate central office of a digital carrier telephone network maintains the digital format of the T1 traffic in the course of a DS0 tandem...
5161151 System and method for controlling multiplex communications between master station and slave stations  
A system and method for controlling multiplex communication between a master station and a plurality of slave stations, in which a predetermined signal (dummy signal) is transmitted to the...
5138609 Automatic channel switching from fallback channels to regular channels  
In a channel switching system, first and second stations are normally interconnected through first and second regular channels and switched to fallback channels established by a public switched...
4979506 Self-test system and method for external programming device  
A communication system includes self-test means for automatically testing its performance. The communication system is adapted for use between an implantable device, such as a pacemaker, and an...
4918623 Testing the performance of a communication line between two modems using modem processor  
Apparatus for testing the performance of a communication line that carries customer data between two modems, including a programmable processor (for example, a digital signal processor) in each...
4807274 Telephone line quality testing system  
A telephone line quality testing system detects line echoes in the telephone connection between two subsystems in a message transmission system. The test for line echoes is performed while the two...
4633411 Link quality analyzer  
A link quality analyzer measures the link quality between a calling station and a called station by continuously transmitting a plurality of signal tones. The called station receives the plurality...
4630268 Communication circuit loopback test apparatus  
To perform a loopback condition for testing purposes, the present apparatus supplies a null signal from an end terminal on a communication link through a set of repeater stations to reinitialize...
4606044 Adjusting data transmission rate based on received signal quality  
A data transmission control system for allowing remote transceiver stations to transmit data via a telephone line or like analog transmission line through modems. When transmit and receive...
4546473 Random pattern self test design  
A PLA is constructed to improve random testing. Section circuits are provided that permit disabling sections of the output lines that are called segments so that the circuit can be tested one...
4539683 Method and apparatus for checking analog-to-digital converters, digital-to-analog converters, or telecommunications transmission links which contain such converters  
The test specimen is charged with an analog, preferably sinusoidal periodic test signal or, respectively, with the digital samples of such a test signal, whereby a numerical relationship exists...
4417337 Adaptive multitone transmission parameter test arrangement  
Accurate and reliable measurements of transmission parameters, e.g., envelope delay distortion or frequency response, of a network or facility (105) are obtained in a test system (FIG. 1)...
4413335 Fault recovery apparatus for a PCM switching network  
This fault recovery system determines the integrity of a duplex digital PCM switching network. The two copies of the switching network operate in synchronization and comparison of the outputs of...
4410986 Error and status detection circuit for a digital regenerator using quantized feedback  
A digital regenerator line includes in each station a status and error detection arrangement having an error detection circuit (64) responsive to a filtered composite output signal (101) from a...
4352182 Method of and device for testing the quality of digital speech-transmission equipment  
A device for analyzing the quality of digital speech-transmission equipment, specifically a speech coder, comprises generators of white-noise signals, sinusoidal signals, frequency-shaped signals...
4301536 Multitone frequency response and envelope delay distortion tests  
Accurate and reliable measurement results are obtained in a test system (FIG. 1) employing digital data acquisition units (121) when measuring frequency response or envelope delay distortion of a...
4176317 Circuit arrangement for determining the frequency dependent amplitude fluctuation characteristic of a communications transmission link  
A circuit arrangement for correcting and controlling the attenuation characteristic of a communications transmission link by using adjustable attenuators in which a measuring transmitter produces...
4105995 Digitally controlled transmission impairment measuring apparatus  
A portable microprocessor controlled transmission impairment measuring unit capable of operating as a master unit or a slave unit and responsive to digital or manual control measures all basic...
4071704 Service generator checking apparatus  
Service generator checking apparatus and a method in a telephone system operating in time frames each consisting of time slots. The apparatus sends a tone sample signal in one frame through a...
4025854 In-service technique for measuring transmission characteristics of a microwave radio link  
A composite test signal consisting of a search test signal and a sweep test signal from a link test set is combined with the through-path traffic signals during in-service testing. The composite...
4009356 Data modems having data drop-out and data echo protection  
Disclosed is an automatic data communication system having communicating modems equipped with automatic equalizers. The equalizers respond to a first long equalization sequence automatically...
4001559 Programmable measuring  
A communications line under test intercouples programmable local units, one of which transmits an analog waveform to the other in response to digital control signals received from a computer. The...
3943305 Telephone line control system  
Telephone line testing equipment in which a series of alternating current tone pulses are transmitted from the central office along the lines to a sensing means placed at a remote point in the...

Matches 1 - 50 out of 54 1 2 >