ROLF LEIRVIK ANDERSON
Pilots at Elkcrest Ct, Portland, OR

7254498, Aug 7, 2007

Oct 14, 2003

10/686412

John J. Pickerd - Hillsboro OR, US
Marvin E. La Voie - Beaverton OR, US
Rolf Anderson - Portland OR, US

Tektronix, Inc. - Beaverton OR

G06F 19/00

702 67, 324 7611

A method and apparatus for selectively providing bandwidth extension and channel matching for acquired signals under test (SUT). The method and apparatus includes a signal acquisition device for acquiring a signal under test (SUT) and generating therefrom a stream of acquired samples, where the signal acquisition device having associated with it a first bandwidth defining a nominal pass band. At least one digital filter imparts a gain equalization function to the acquired SUT samples within a spectral region including and extending beyond the nominal passband. A controller generates a display signal suitable for use by a display device, where the display signal representing waveform imagery associated with the gain equalized SUT.

2007004, Feb 22, 2007

May 25, 2006

11/441845

John Pickerd - Hillsboro OR, US
Kan Tan - Beaverton OR, US
William Hagerup - Portland OR, US
Rolf Anderson - Portland OR, US
Sharon McMasters - Sherwood OR, US

H04M 1/24

379030000

A method and apparatus adapted to calibrate a test probe and oscilloscope system such that loading effects of the probe are substantially removed from the measurement. A signal under test from a device under test is coupled to the test probe and used with selectable impedance loads in the test probe to characterize transfer parameters of the device under test. An equalization filter in either the frequency or time domain is computed from the device under test transfer parameters for reducing in signal error attributable to the measurement loading of the device under test.

4974167, Nov 27, 1990

Feb 28, 1989

7/317701

Rolf P. Anderson - Tigard OR
James B. Proebstel - Beaverton OR

Tektronix, Inc. - Beaverton OR

G06F 1520, G06F 1214

364487

A digital oscilloscope includes an acquisition system for digitizing an input signal to produce and store in memory a waveform data sequence representing the input signal. A display system within the instrument reads out and processes the data stored in the memory to produce a waveform display representing the input signal. The instrument responds to an input "erase" command from a user by overwriting the waveform data sequence stored in memory with a predetermined data sequence defining an easily recognizable display pattern. The oscilloscope thereafter performs a checksum operation on overwritten portions of memory to determine whether the overwrite operation was successful, and displays an indication of overwrite success on its screen.

7460983, Dec 2, 2008

Aug 23, 2006

11/508460

John J. Pickerd - Hillsboro OR, US
Kan Tan - Beaverton OR, US
William A. Hagerup - Portland OR, US
Rolf P. Anderson - Portland OR, US
Sharon M. Mc Masters - Sherwood OR, US

Tektronix, Inc. - Beaverton OR

G06F 19/00, G06F 17/40

702190, 702 85, 702 86, 702 90, 702104, 702108, 702109, 702116, 702189, 708300, 708314, 708321

A method and apparatus adapted to calibrate a signal path of a signal analysis system such that loading effects of the system are substantially removed from measurements of a device under test. A signal under test from the device under test is coupled to a test probe in the signal path and used with selectable impedance loads in the test probe to characterize transfer parameters of the device under test. An equalization filter in either the frequency or time domain is computed from the device under test transfer parameters for reducing in signal error attributable to the measurement loading of the device under test.

2005018, Aug 25, 2005

Jan 27, 2005

11/045413

John Pickerd - Hillsboro OR, US
Kan Tan - Beaverton OR, US
William Hagerup - Portland OR, US
Rolf Anderson - Portland OR, US
Sharon McMasters - Sherwood OR, US

H04M001/24

379030000

A method and apparatus adapted to calibrate a test probe and oscilloscope system such that loading effects of the probe are substantially removed from the measurement.

2005018, Aug 25, 2005

Feb 25, 2004

10/786446

John Pickerd - Hillsboro OR, US
Kan Tan - Beaverton OR, US
William Hagerup - Portland OR, US
Rolf Anderson - Portland OR, US
Sharon McMasters - Sherwood OR, US

H04M001/24, H04M003/08, H04M003/22

379030000

A method and apparatus adapted to calibrate a test probe and oscilloscope system such that loading effects of the probe are substantially removed from the measurement.