Patents Assigned to Sunrise Telecom Incorporated
  • Patent number: 7991044
    Abstract: A device and methods for automatically diagnosing impairments in a digital quadrature amplitude modulated signal is disclosed. The impairments include phase noise, compression, coherent interference, and non-coherent interference. The device comprises a phase noise detector, a compression detector, and an interference detector. The phase noise detector detects phase noise by analyzing data points of an amplitude quadrature modulated constellation for orthogonal deviations from ideal points. The compression detector detects compression by analyzing the magnitudes of vectors from the constellation's origin to data points of the constellation. The interference detector detects coherent and non-coherent interference by detecting error signals in the data points and then analyzing the distribution of the error signals.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: August 2, 2011
    Assignee: Sunrise Telecom Incorporated
    Inventors: Clifford Brown, James E. Barker
  • Patent number: 7885195
    Abstract: A test system comprising: acquiring an upstream channel descriptor list; entering a pause network state when the upstream channel descriptor list is completed; and selecting a particular channel from the upstream channel descriptor list before exiting the pause network state.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: February 8, 2011
    Assignee: Sunrise Telecom Incorporated
    Inventors: Brady Volpe, Matt DuBose, Marco Laburada
  • Publication number: 20100146367
    Abstract: A system for testing a portion of a cable network provides a pattern generator, addresser, forward error corrector, and comparator. The system is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.
    Type: Application
    Filed: February 10, 2010
    Publication date: June 10, 2010
    Applicant: SUNRISE TELECOM INCORPORATED
    Inventors: Richard C. Jaworski, Robert L. Richards, James E. Barker, Herman B. Elliott
  • Patent number: 7721162
    Abstract: A system for testing a portion of a cable network provides a pattern generator, Addresser, forward error corrector, and comparator. The system is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: May 18, 2010
    Assignee: Sunrise Telecom Incorporated
    Inventors: Richard C. Jaworski, Robert L. Richards, James E. Barker, Herman B. Elliott
  • Patent number: 7656807
    Abstract: A test set includes at least one signal input port, a test circuitry, a processor, a user-input device, and a display. The test circuitry couples to and receives signals from the at least one signal input port. The test circuitry then generates test data corresponding to the received signals. The processor couples to and receives test data from the test circuitry and generates test results. The processor also couples to and receives commands from the user-input device. The processor further operatively couples to the graphical display that receives and displays the test results from the processor. In one embodiment, the test set is capable of performing line qualification and connectivity testing. A modem module can be used to facilitate connectivity testing. The modem module can be a plug-in module with a common interface to the test set. The modem module can also contain a fingerprint value that identifies the module type and the software revision number to the test set.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: February 2, 2010
    Assignee: Sunrise Telecom Incorporated
    Inventors: Paul Chang, Tom Dang, Chi Lin Wu
  • Publication number: 20090287964
    Abstract: An Internet accessible test system including: providing a remote client having an Internet connection; and exercising a tester function across the Internet connection by the remote client.
    Type: Application
    Filed: May 17, 2008
    Publication date: November 19, 2009
    Applicant: SUNRISE TELECOM INCORPORATED
    Inventor: John R. Morris
  • Publication number: 20090254956
    Abstract: A communication signal characteristic measurement system comprising: detecting a quiet line including: storing a specific characteristic data, detecting a vertical synchronization pulse in the specific characteristic data, and applying an eight line delay in the specific characteristic data; and displaying a data set showing the quiet line relative to the vertical synchronization pulse.
    Type: Application
    Filed: April 4, 2008
    Publication date: October 8, 2009
    Applicant: SUNRISE TELECOM INCORPORATED
    Inventors: Boris Smychkovich, Jim Harris
  • Patent number: 7595888
    Abstract: A method for optical spectrum analysis provides a tunable optical filter and scans a wavelength range of an optical signal that is larger than the free spectrum range of the tunable optical filter. The optical signal is filtered through the tunable optical filter. Separate multiple optical orders of the wavelengths scanned and filtered by the tunable optical filter are individually detected.
    Type: Grant
    Filed: January 2, 2008
    Date of Patent: September 29, 2009
    Assignee: Sunrise Telecom Incorporated
    Inventors: Paul Chang, Ke-Cai Zeng
  • Patent number: 7589840
    Abstract: A wavelength measurement or monitoring system provides a tunable Fabry-Perot optical filter. At least one known light source is used to calibrate and correlate separate wavelength bands scanned by the tunable Fabry-Perot optical filter. At least one wavelength reference is utilized to calibrate at least one wavelength band of the tunable Fabry-Perot optical filter. The wavelength reference is transferred to a wavelength band that is identified for measurement when the wavelength reference is not in a wavelength band identified for measurement by the tunable Fabry-Perot optical filter. An unknown optical signal is scanned through the tunable Fabry-Perot optical filter. The wavelengths in the unknown optical signal are specified.
    Type: Grant
    Filed: January 10, 2006
    Date of Patent: September 15, 2009
    Assignee: Sunrise Telecom Incorporated
    Inventor: Ke-Cai Zeng
  • Publication number: 20090213737
    Abstract: A test system comprising: providing a conditioning circuit; cabling a cable modem termination system to the conditioning circuit; signaling an initial ranging request to the cable modem termination system; and determining a transmission power limiter by the conditioning circuit monitoring a network for detecting a cable modem termination system response to the initial ranging request.
    Type: Application
    Filed: February 21, 2008
    Publication date: August 27, 2009
    Applicant: SUNRISE TELECOM INCORPORATED
    Inventor: Gregory R. Potter
  • Publication number: 20090213738
    Abstract: A test system comprising: acquiring an upstream channel descriptor list; entering a pause network state when the upstream channel descriptor list is completed; and selecting a particular channel from the upstream channel descriptor list before exiting the pause network state.
    Type: Application
    Filed: February 26, 2008
    Publication date: August 27, 2009
    Applicant: SUNRISE TELECOM INCORPORATED
    Inventors: Brady Volpe, Matt DuBose, Marco Laburada
  • Patent number: 7554926
    Abstract: A remote test unit and method of operation are provided for utilizes the ability of an access matrix ability to route signals. The Remote Test Unit can emulate a central Digital Subscriber Line Modem (DSLM-C) for testing customer premises equipment containing a remote Digital Subscriber Line Modem (remote Digital Subscriber Line Modem). The Remote Test Unit can also emulate a remote Digital Subscriber Line Modem for testing central offices equipment including a digital subscriber line access multiplexer (DSLAM) containing a central Digital Subscriber Line Modem. The Remote Test Unit can also emulate a concentrator connected to the DSLAM, a router connected to the concentrator, an Internet service provider (ISP) connected to the router, and a web site connected to the Internet service provider over the Internet.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: June 30, 2009
    Assignee: Sunrise Telecom Incorporated
    Inventor: Raymond L. Chong
  • Publication number: 20090147671
    Abstract: A system for testing a portion of a cable network provides a pattern generator, Addresser, forward error corrector, and comparator. The system is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.
    Type: Application
    Filed: February 13, 2009
    Publication date: June 11, 2009
    Applicant: Sunrise Telecom Incorporated
    Inventors: Richard C. Jaworski, Robert L. Richards, James E. Barker, Herman B. Elliott
  • Publication number: 20090149173
    Abstract: A wireless network profiling system is provided including providing a base station tester for attaching to a cellular base station, using a global positioning system for logging the position information of the cellular base station, using the base station tester for collecting a parametric information from the cellular base station and using a mobile handset emulator for transferring the parametric information and position information for analysis and storage.
    Type: Application
    Filed: May 9, 2006
    Publication date: June 11, 2009
    Applicant: Sunrise Telecom Incorporated
    Inventor: Michael Tolaio
  • Publication number: 20090140992
    Abstract: A display system including: providing a processor; enabling a touch screen, having a measurement grid, by the processor; pressing a hard key, a soft key, a function tab, a function soft key, the measurement grid, or a combination thereof for activating the touch screen; and displaying a user data on the measurement grid of the touch screen by the processor.
    Type: Application
    Filed: June 11, 2008
    Publication date: June 4, 2009
    Applicant: Sunrise Telecom Incorporated
    Inventor: Michael Tolaio
  • Patent number: 7509542
    Abstract: A system and method for testing a portion of a cable network provides a pattern generator, addresser, forward error corrector, and comparator. The system and method is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal. The addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel. Preferably, the comparator uses a bit error rate test to determine the performance of the back channel.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: March 24, 2009
    Assignee: Sunrise Telecom Incorporated
    Inventors: Richard C. Jaworski, Robert L. Richards, James E. Barker, Herman B. Elliott
  • Patent number: 7499182
    Abstract: An optical signal measurement system provides a tunable optical filter. An unknown optical signal is scanned through the tunable optical filter. The wavelength and chromatic dispersion values of the unknown optical signal scanned through the tunable optical filter are measured by operating the tunable optical filter in a scanning mode for at least one of OSA and PMD measurements, and in a stepping mode for CD measurements. The wavelength and the dispersion values in the unknown optical signal are specified.
    Type: Grant
    Filed: December 24, 2006
    Date of Patent: March 3, 2009
    Assignee: Sunrise Telecom Incorporated
    Inventors: Ke-Cai Zeng, Paul Chang, J├╝rgen Brendel
  • Patent number: 7447921
    Abstract: A network test architecture includes a plurality of modules for performing a plurality of functions, each of the plurality of modules having a unique identifier. An additional module for performing an additional function has an additional unique identifier. A control bus is connected among the plurality of modules; a data bus is connected among the plurality of modules; and a power bus is connected among the plurality of modules. A controller controls operation, data transmission, and powering of the plurality of modules and the additional module, respectively, through the control bus, the data bus, and the power bus, the controller using the unique identifier and the additional unique identifier of the plurality of modules upon simultaneous connection of the control bus, the data bus, and the power bus to the additional module.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: November 4, 2008
    Assignee: Sunrise Telecom Incorporated
    Inventors: Jeong Eun Joo, Fred King, Patrick Riley, Aart Konynenberg, Paul Chang
  • Patent number: 7409115
    Abstract: A method and apparatus for filter spectrum deconvolution and reshaping include providing a filter output of a spectrum signal and determining the intensity and wavelength of the spectrum signal at each spectral peak. The filter output is characterized as an integral of convolution of a spectrum signal function and a filter function. Transformation are then performed on the filter output to deconvolve and remove the undesirable filter function and add a desirable filter function to reshape the output filter spectrum.
    Type: Grant
    Filed: August 15, 2006
    Date of Patent: August 5, 2008
    Assignee: Sunrise Telecom Incorporated
    Inventors: Ke-Cai Zeng, Xuandong Hua
  • Patent number: 7386231
    Abstract: A method and apparatus for testing network data signals in an optical wavelength division multiplexing network employ an optical wavelength division multiplexing function and a network analysis function to analyze the optical spectrum and extract from and insert data signals into a wavelength division multiplexing network for data signal analysis by the network analysis function.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: June 10, 2008
    Assignee: Sunrise Telecom Incorporated
    Inventors: Frederick Gordon King, Patrick Riley