Oscilloscope having advanced triggering capability

US7191079B2 · kind B2 · utility

Assignee

• Tektronix, Inc. · US

Inventors

• Patrick A. Smith · Northfield, US
• Que Thuy Tran · Beaverton, US
• John C. Delacy · Portland, US
• Daniel G. Knierim · Beaverton, US
• David L. Kelly · Mission Viejo, US
• John C. Calvin · Portland, US

Key dates

• Filing date: Mar 23, 2005
• Grant date: Mar 13, 2007
• Expiry date: Mar 23, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R13/0254
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An advanced trigger circuit includes two trigger decoders, each triggering on one of respective pluralities of continuous-time trigger events. In one embodiment, a programmable timer begins timing in response to an output signal of the first trigger decoder and generates an end-of-time signal at the expiration of its time period. A reset circuit resets the first trigger decoder if the second selected continuous-time trigger event failed to occur before the end-of-time signal was generated. In another embodiment, a reset decoder generates a reset signal in response to an occurrence of a selected continuous-time trigger event. The reset circuit is responsive to the reset signal for resetting the first trigger decoder if the second selected continuous-time trigger event failed to occur before the reset signal was generated. In other embodiments, the advanced trigger circuit triggers on a serial lane skew violation or on a beacon width violation.