Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7564896 | Method for measuring multiple parameters of a signal transmitted by a signal generator A method is disclosed for measuring one or more parameters of a signal generated by a signal generator. The method employs capturing and analyzing a train of data packets or other forms of signals from a single transmission to obtain measured values for the one or m... | 07/21/2009 |
| 7558316 | System and method for implementing a delta-sigma modulator integrity supervisor A system and a method for constructing a signal integrity supervisor capable of both detecting and triggering an appropriate response when transmit path signals indicate a potential damaging transmitter operating mode. The system and method of the present invention ... | 07/07/2009 |
| 7555038 | Transmission system, signal receiver, test apparatus and test head A transmission system for transmitting a transmission signal, includes a section for outputting a periodic clock having a preset period, a section for transmitting the transmission signal in synchronism with the periodic clock, and a section for receiving the transm... | 06/30/2009 |
| 7529294 | Testing of multiple asynchronous logic domains A digital system and a method for operating the same. The digital system includes (a) a first and a second pins, (b) first and second logic domains, and (c) first and second test pulse generator circuits. The first test pulse generator circuit is electrically couple... | 05/05/2009 |
| 7522661 | Method of producing a two-dimensional probability density function (PDF) eye diagram and Bit Error Rate eye arrays A method of producing of a two-dimensional probability density function eye diagram and Bit Error Rate eye arrays generates a two-dimensional PDF array of a correlated waveform record of a data pattern under test which is convolved with a two-dimensional probability... | 04/21/2009 |
| 7522660 | Pulse pattern generating apparatus An object of this invention is to realize a pulse pattern generating apparatus that outputs a test signal of high waveform quality even when the shape of an eye pattern is changed. This invention is an improvement of a pulse pattern generating apparatus that generat... | 04/21/2009 |
| 7522662 | 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 a... | 04/21/2009 |
| 7519111 | Apparatus and method for providing system and test clock signals to an integrated circuit on a single pin In a configuration testing integrated circuits, the system clock signals are forced to the same frequency as the test clock signals. When the test clock signals and the system clock signals have the same frequency, both clock signals can applied to the integrated ci... | 04/14/2009 |
| 7519112 | 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... | 04/14/2009 |
| 7508868 | Systems and methods for testing the performance of and simulating a wireless communication device A system abstracts channel information from field data gathered in actual wireless communication system environments. The abstracted data is then transformed into control signals or programming codes that can be used to control channel simulators so as to recreate t... | 03/24/2009 |
| 7502410 | Method and system for controlling a notching mechanism A circuit (100) is provided for notching an incoming wireless signal. The circuit comprises: a notching mechanism (110) for receiving an incoming signal and generating a notched signal having reduced power at the notch frequency (320), the notch... | 03/10/2009 |
| 7486724 | Codec compensation techniques for channel analysis applications Methods and apparatus to perform and/or analyze communication channels are described. In one embodiment, a test signal may be generated and transferred using a first signal route to a line-under-test in response to line qualification mode. The first signal route may... | 02/03/2009 |
| 7486725 | 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... | 02/03/2009 |
| 7483477 | 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. Outlying signals not exhibiting overlap for a sampling parameter common for all channels may be ignored and a warning given. Selected, normalized eye openings are used to discover optimum sampling paramet... | 01/27/2009 |
| 7480328 | Signal generator with display unit A signal generator includes a baseband unit, generating a digital, and an I/Q modulator, modulating the digital baseband signal. A storing memory stores a time slot of said digital baseband signal and an optical display unit represents the digital baseband signal st... | 01/20/2009 |
| 7477684 | Testing method, communication device, and testing system A testing method of a communication device according to the present invention comprises: a step for transmitting and receiving a test signal generated based on a reference clock; a step for generating an anticipated value of the test signal based on the reference cl... | 01/13/2009 |
| 7477685 | Method and systems for analyzing the quality of high-speed signals Methods and systems for analyzing the quality of high-speed signals are provided, wherein a high speed signal is sampled simultaneously a plurality of times during a sampling clock period at each of a plurality of phase rotator positions to generate a plurality of p... | 01/13/2009 |
| 7466748 | 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 ... | 12/16/2008 |
| 7460590 | Handheld communication tester and method for testing direct serial communication capability of an intelligent electronic device in a power system Provided is a handheld communication tester and method for testing direct serial communication capability of an IED. The first IED includes an equal plurality of transmit bit channels and receive bit channels. The handheld communication tester includes a housing siz... | 12/02/2008 |
| 7460589 | Eye monitoring and reconstruction using CDR and sub-sampling ADC Apparatus and method are disclosed for constructing an eye pattern from a serial data signal within a receiver used in a serial data communication system. The receiver is used to receive the serial data signal and generates an internal clock signal from the serial d... | 12/02/2008 |
| 7453932 | 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 referenc... | 11/18/2008 |
| 7453931 | Method for measuring the modulation error of digitally modulated high frequency signals A method is described for measuring the modulation error in digital modulated high frequency signal, whose amplitude and/or phase is digitally distorted according to a predetermined function, in particular limited by a given clip factor, in which the signal to be me... | 11/18/2008 |
| 7450633 | Wander generator, and digital line tester and phase noise transfer characteristic analyzer using the same A wander generator has a random number signal generator unit, a filter unit, a clock generator unit, a modulator unit, and a setting unit. The random number generator unit sequentially generates random number signals comprised of a plurality of bits at a constant sp... | 11/11/2008 |
| 7444558 | Programmable measurement mode for a serial point to point link A serial point to point link that communicatively couples an integrated circuit (IC) device to another IC device is initialized by transferring a training sequence of symbols over the link. Registers of the IC device are programmed, to set a symbol data pattern and ... | 10/28/2008 |
| 7440524 | Channel estimation in a wireless transmission system A GSM communication system uses a channel estimator to generate a channel impulse response estimate from received bursts. Preferred embodiments of such a system include a first correlation unit that uses N midamble bits to evaluate received signals and produce first... | 10/21/2008 |
| 7430236 | Communication interface for a path measuring device A communication interface for a path measuring device is provided. The interface can be coupled between the path measuring device and a control device. A path determination can be carried out by the path measuring device by way of a measurement of the propagation ti... | 09/30/2008 |
| 7428270 | Method and system for detecting and classifying the modulation of unknown analog and digital telecommunications signals Disclosed is a unique system and method for recognizing the type of modulation embedded in an unknown complex baseband signal, comprising a receiver section for extracting the complex baseband signal from a modulated signal having a carrier frequency, and comprising... | 09/23/2008 |
| 7424051 | Pad and CODEC detection A Digital Impairment detection scheme which is designed for providing reliable estimate of digital impairments such as PAD, and CODEC type in the presence of digital impairments such as Robbed Bit Signalling and non G.711 complaint network CODECs and analog impairme... | 09/09/2008 |
| 7421016 | Method and apparatus for testing wireless communication channels Techniques to test a wireless communication link. A traffic channel is tested via a test data service option (TDSO) that may be negotiated and connected similar to other services. Test parameters values may be proposed, accepted or rejected, and negotiated. Test dat... | 09/02/2008 |
| 7418054 | Transmitter adjustment based on transmission statistics A WLAN (Wireless Local Area Network) transmitter or another data communications apparatus is provided that includes a transmission section that is configured to generate signals to be transmitted, and a control section that is connected to the transmission section t... | 08/26/2008 |
| 7418032 | Altering power consumption in communication links based on measured noise A method, circuit and system for altering the power consumption in communication links. A type of noise and an amount of jitter in a signal transmitted across a communication link is measured. Upon determining the contribution of the measured noise to the measured j... | 08/26/2008 |
| 7412341 | Jitter amplifier, jitter amplification method, electronic device, testing apparatus, and testing method There is provided a jitter amplifier for amplifying or attenuating a jitter component contained in an input signal, having a jitter demodulating section for demodulating the jitter component from the input signal and an amplifying circuit for amplifying or attenuati... | 08/12/2008 |
| 7411999 | Method for selecting and extracting an eye diagram opening for subsequent processing Measurements for an eye diagram of signal of interest are placed in a data structure that is examined to locate an eye opening of interest. The eye opening of interest is normalized into figure of merit units related to the operational voltage and timing requirement... | 08/12/2008 |
| 7400673 | Method of determining and displaying powers of code channels and analysis device The invention relates to an analysis device and a method of determining and displaying powers of code channels of a CDMA signal, the powers of the individual code channels being determined and shown on an output device. The powers of the individual code channels are... | 07/15/2008 |
| 7400671 | Periodic calibration for communication channels by drift tracking A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to... | 07/15/2008 |
| 7400670 | Periodic calibration for communication channels by drift tracking A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to... | 07/15/2008 |
| 7397865 | Systems and methods of using IQ modulation for calibration or measurement A system analyzer may generate an estimated frequency response of a device, system, communication medium, or combination thereof by utilizing a stimulus signal that is robust against IQ modulator impairments. A stimulus generator may be used to generate a plurality ... | 07/08/2008 |
| 7397847 | Testing device for testing electronic device and testing method thereof 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 si... | 07/08/2008 |
| 7394773 | Network bridge uplink port identification An ICMP ping is sent from a test instrument to all known bridges and switches on a network, which respond by populating the forwarding data base (FDB) tables with the MAC addresses of adjacent bridges. Then an SNMP query is sent to the FDB table of a selected bridge... | 07/01/2008 |
| 7394880 | Method and apparatus for simulating radio channel A radio channel simulator configured to read radio channel data describing a radio channel and user data including at least one user signal, and to simulate the radio channel using a FIR filter comprising one or more FIR blocks for filtering the user data read based... | 07/01/2008 |
