Steven Paul Sutton

US Patent:

46776206, Jun 30, 1987

Filed:

Feb 28, 1985

Appl. No.:

6/706578

Inventors:

Steven R. Sutton - Beaverton OR
Gerd H. Hoeren - Lake Oswego OR

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

G06F 1100
G01R 1700

US Classification:

371 27

Abstract:

A method for adjusting a time delay of a signal with respect to a reference event is achieved by displaying a graphical representation of the delay time on a display terminal, modifying the displayed graphical depiction to indicate a different time delay, and then adjusting the time delay of the signal to match the modified time delay indicated by the displayed graphical depiction. The display terminal is controlled by a display controller and the graphical depiction of the delay time is modified by an operator using cursor control keys of a keyboard to transmit a first indicating signal to the display controller and other keys of the keyboard to transmit a second indicating signal to the display controller. Each time the controller detects a first indicating signal, the graphically displayed delay time is incremented and each time the controller detects a second indicating signal, the graphically displayed delay time is decremented. The controller automatically adjusts the actual test signal delay time after the displayed delay time has been adjusted.

US Patent:

45411000, Sep 10, 1985

Filed:

Jul 19, 1982

Appl. No.:

6/399938

Inventors:

Steven R. Sutton - Beaverton OR
Michael S. Hagen - Vancouver WA
David D. Chapman - Portland OR
Glenn S. Gombert - Hillsboro OR
Steven R. Palmquist - Beaverton OR

Assignee:

Tektronix, Inc. - Beaverton OR

International Classification:

H04L 100

US Classification:

375 10

Abstract:

An input apparatus for a multi-channel device, such as a logic analyzer, is disclosed, the input apparatus providing the multi-channel device with a programmable set-up and hold feature. The multi-channel device acquires a logic signal from a product under test, the logic signal having associated therewith an actual set-up and hold time with respect to an external clock signal. The actual set-up and hold times are entered into the multi-channel device via a keyboard and a display. The device has stored therein a desired set-up and hold time required by the logic signal relative to the external clock signal. In accordance with the actual and the desired set-up and hold times, the multi-channel device changes the relative orientation of the acquired logic signal with respect to the external clock signal, along the time axis until the set-up and hold times of the acquired logic signal are changed from the actual value to the desired value. As a result, the multi-channel device can be used to troubleshoot any product under test regardless of the set-up and hold times of the generated logic signals, relative to an external clock signal, associated therewith.