Patents by Inventor John F. Turpin

John F. Turpin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9207269
    Abstract: A test and measurement instrument according to an embodiment of the present invention automatically detects excessive in-band but out-of-span energy and notifies the user of the condition.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: December 8, 2015
    Assignee: Tektronix, Inc.
    Inventors: John F. Turpin, Alfred K. Hillman, Jr.
  • Patent number: 9164131
    Abstract: A test and measurement instrument processes digital data that represents an input signal to produce a target image, and then uses a computer vision technique to recognize a signal depicted within the target image. In some embodiments, the location of the signal within the target image is identified on a display device. In other embodiments, the location of the signal within the target image is used to perform a measurement. In other embodiments, when the signal is recognized, a trigger signal is generated that causes digital data that represents the input signal to be stored in a memory.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: October 20, 2015
    Assignee: Tektronix, Inc.
    Inventors: John F. Turpin, Kathryn A. Engholm
  • Patent number: 8706435
    Abstract: A test and measurement instrument converts digital data that represents an input signal into a plurality of bitmaps, and then subtracts one of the bitmaps from another one of the bitmaps to produce a difference bitmap. The difference bitmap does not contain density values that are common to the two bitmaps, but instead only contains the density differences between the two, thereby revealing very small density variations in the presence of large density values. In some embodiments, the difference bitmap is displayed on a display device. In other embodiments, the difference bitmap is used to generate a trigger signal.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 22, 2014
    Assignee: Tektronix, Inc.
    Inventors: Kathryn A. Engholm, John F. Turpin
  • Publication number: 20130317769
    Abstract: A test and measurement instrument according to an embodiment of the present invention automatically detects excessive in-band but out-of-span energy and notifies the user of the condition.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 28, 2013
    Applicant: TEKTRONIX, INC.
    Inventors: JOHN F. TURPIN, ALFRED K. HILLMAN, JR.
  • Patent number: 8452559
    Abstract: A “density trace” according to an embodiment of the present invention is formed by measuring the density of each column of a frequency domain bitmap above a user-specified “amplitude threshold.” The density of each column equals the sum of the densities of all of the pixels in the column that are above the amplitude threshold divided by the sum of the densities of all of the pixels in the column. A density trace provides a convenient way to define and represent the occupancy for a large number of columns, and also allows density data to be quickly transmitted from one instrument or computer to another. In some embodiments, a density trace is incorporated into a trigger detector of a test and measurement instrument and used to generate a trigger signal. The trigger detector compares the density trace to a user-specified “density threshold” and generates the trigger signal when the value of any point of the density trace violates the density threshold.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: May 28, 2013
    Assignee: Tektronix, Inc.
    Inventors: Kathryn A. Engholm, Alfred K. Hillman, Jr., John F. Turpin, David H. Eby
  • Patent number: 8452571
    Abstract: A real-time trigger figure-of-merit indicator for test and measurement instruments provides an indication of how close a signal-under-test is to satisfying a relevant trigger condition. The indicator includes a first marker that indicates a real-time trigger figure-of-merit that is calculated based on digital samples that represent the signal-under-test, and a second marker that indicates a level that the figure-of-merit must exceed in order for a trigger event detector to detect a trigger event and generate a trigger signal. Thus, by observing the indicator, a user may easily ascertain how close a signal-under-test is to satisfying the relevant trigger condition without requiring the instrument to actually trigger.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: May 28, 2013
    Assignee: Tektronix, Inc
    Inventor: John F. Turpin
  • Publication number: 20110282610
    Abstract: A “density trace” according to an embodiment of the present invention is formed by measuring the density of each column of a frequency domain bitmap above a user-specified “amplitude threshold.” The density of each column equals the sum of the densities of all of the pixels in the column that are above the amplitude threshold divided by the sum of the densities of all of the pixels in the column. A density trace provides a convenient way to define and represent the occupancy for a large number of columns, and also allows density data to be quickly transmitted from one instrument or computer to another. In some embodiments, a density trace is incorporated into a trigger detector of a test and measurement instrument and used to generate a trigger signal. The trigger detector compares the density trace to a user-specified “density threshold” and generates the trigger signal when the value of any point of the density trace violates the density threshold.
    Type: Application
    Filed: May 12, 2010
    Publication date: November 17, 2011
    Applicant: TEKTRONIX, INC
    Inventors: KATHRYN A. ENGHOLM, ALFRED K. HILLMAN, JR., JOHN F. TURPIN, DAVID H. EBY
  • Publication number: 20110280489
    Abstract: A test and measurement instrument processes digital data that represents an input signal to produce a target image, and then uses a computer vision technique to recognize a signal depicted within the target image. In some embodiments, the location of the signal within the target image is identified on a display device. In other embodiments, the location of the signal within the target image is used to perform a measurement. In other embodiments, when the signal is recognized, a trigger signal is generated that causes digital data that represents the input signal to be stored in a memory.
    Type: Application
    Filed: May 13, 2010
    Publication date: November 17, 2011
    Applicant: TEKTRONIX, INC
    Inventors: JOHN F. TURPIN, KATHRYN A. ENGHOLM
  • Publication number: 20110273469
    Abstract: A test and measurement instrument converts digital data that represents an input signal into a plurality of bitmaps, and then subtracts one of the bitmaps from another one of the bitmaps to produce a difference bitmap. The difference bitmap does not contain density values that are common to the two bitmaps, but instead only contains the density differences between the two, thereby revealing very small density variations in the presence of large density values. In some embodiments, the difference bitmap is displayed on a display device. In other embodiments, the difference bitmap is used to generate a trigger signal.
    Type: Application
    Filed: May 28, 2010
    Publication date: November 10, 2011
    Applicant: TEKTRONIX, INC
    Inventors: KATHRYN A. ENGHOLM, JOHN F. TURPIN
  • Publication number: 20110231156
    Abstract: A real-time trigger figure-of-merit indicator for test and measurement instruments provides an indication of how close a signal-under-test is to satisfying a relevant trigger condition. The indicator includes a first marker that indicates a real-time trigger figure-of-merit that is calculated based on digital samples that represent the signal-under-test, and a second marker that indicates a level that the figure-of-merit must exceed in order for a trigger event detector to detect a trigger event and generate a trigger signal. Thus, by observing the indicator, a user may easily ascertain how close a signal-under-test is to satisfying the relevant trigger condition without requiring the instrument to actually trigger.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 22, 2011
    Applicant: TEKTRONIX, INC.
    Inventor: John F. Turpin
  • Patent number: 7894419
    Abstract: An activity display for multiple data channels over a period of time for a communication link provides a quasi-three-dimensional presentation having time periods and data channels as orthogonal axes and shading within each time period/data channel rectangle representing ones density for the channel during that time period. One or more frames of the communication link corresponding to one time period are captured, and then each frame is processed in sequence one data channel at a time to build up a line of the display for the time period. Over multiple time periods the display is built up line by line, with the oldest line being dropped as a new line is added when the maximum number of lines for the display is achieved. In this way an operator has a high level all-in-one glance at the operation of the communication link.
    Type: Grant
    Filed: September 18, 2006
    Date of Patent: February 22, 2011
    Assignee: TekTronix, Inc.
    Inventors: John F. Turpin, Amy Powell, Stephen D. Follett
  • Patent number: 7751470
    Abstract: Time correlation of signal to distortion characteristics is achieved by acquiring time domain data for a frequency band representing a communication signal, the communication signal having multiple channels. The time domain data is simultaneously converted to frequency and demodulation domain data in sequential time blocks. The frequency and demodulation domain data are processed to obtain respectively frequency and demodulation domain measurements. The resulting measurements are displayed simultaneously as a function of time for all the time blocks and/or for a selected one of the time blocks. An ACLRogram display provides a display having a time axis and a frequency axis in the form of bars spanning the frequency band for each time block with each bar being divided into frequency sub-bands representing a main channel and adjacent side channels, the shading of each segment of the bar representing a measurement value for that segment.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: July 6, 2010
    Assignee: Tektronix, Inc.
    Inventors: Steven W. Stanton, John F. Turpin, Christopher D. Larson
  • Publication number: 20080070508
    Abstract: An activity display for multiple data channels over a period of time for a communication link provides a quasi-three-dimensional presentation having time periods and data channels as orthogonal axes and shading within each time period/data channel rectangle representing ones density for the channel during that time period. One or more frames of the communication link corresponding to one time period are captured, and then each frame is processed in sequence one data channel at a time to build up a line of the display for the time period. Over multiple time periods the display is built up line by line, with the oldest line being dropped as a new line is added when the maximum number of lines for the display is achieved. In this way an operator has a high level all-in-one glance at the operation of the communication link.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Inventors: John F. Turpin, Amy Powell, Stephen D. Follett
  • Patent number: 7109991
    Abstract: An activity display for multiple data channels over a period of time for a communication link provides a quasi-three-dimensional presentation having time periods and data channels as orthogonal axes and shading within each time period/data channel rectangle representing ones density for the channel during that time period. One or more frames of the communication link corresponding to one time period are captured, and then each frame is processed in sequence one data channel at a time to build up a line of the display for the time period. Over multiple time periods the display is built up line by line, with the oldest line being dropped as a new line is added when the maximum number of lines for the display is achieved. In this way an operator has a high level all-in-one glance at the operation of the communication link.
    Type: Grant
    Filed: August 22, 2001
    Date of Patent: September 19, 2006
    Assignee: Tektronix, Inc.
    Inventors: John F. Turpin, Amy Powell, Stephen D. Follett
  • Patent number: 6782256
    Abstract: Measuring wireless network performance from a remote site uses a mobile handset that may include an appropriate world wide network browser. A user connects the mobile handset to the remote site via the wireless network which is coupled to the world wide network. Once the connection is made, application software at the measurement site sends commands to the mobile handset and in response the mobile handset sends measurement data to the application software. The application software processes the data to provide information about the wireless network performance including analyses for predictive and diagnostic purposes, since measurement data from many handsets, many locations and many base stations at many times may be collected at one central location.
    Type: Grant
    Filed: March 22, 2001
    Date of Patent: August 24, 2004
    Assignee: Tektronix, Inc.
    Inventors: Kathryn A. Engholm, Paul J. Stadnik, John F. Turpin
  • Publication number: 20030038769
    Abstract: An activity display for multiple data channels over a period of time for a communication link provides a quasi-three-dimensional presentation having time periods and data channels as orthogonal axes and shading within each time period/data channel rectangle representing ones density for the channel during that time period. One or more frames of the communication link corresponding to one time period are captured, and then each frame is processed in sequence one data channel at a time to build up a line of the display for the time period. Over multiple time periods the display is built up line by line, with the oldest line being dropped as a new line is added when the maximum number of lines for the display is achieved. In this way an operator has a high level all-in-one glance at the operation of the communication link.
    Type: Application
    Filed: August 22, 2001
    Publication date: February 27, 2003
    Inventors: John F. Turpin, Amy Powell, Stephen D. Follett
  • Publication number: 20020137504
    Abstract: Measuring wireless network performance from a remote site uses a mobile handset that may include an appropriate world wide network browser. A user connects the mobile handset to the remote site via the wireless network which is coupled to the world wide network. Once the connection is made, application software at the measurement site sends commands to the mobile handset and in response the mobile handset sends measurement data to the application software. The application software processes the data to provide information about the wireless network performance including analyses for predictive and diagnostic purposes, since measurement data from many handsets, many locations and many base stations at many times may be collected at one central location.
    Type: Application
    Filed: March 22, 2001
    Publication date: September 26, 2002
    Inventors: Kathryn A. Engholm, Paul J. Stadnik, John F. Turpin