Qualified anomaly detection
AssigneeTektronix, Inc.
InventorsPatrick A. Smith, Roland E. Wanzenried
Life of this patent
Estimating the term…
Abstract
A circuit and method of qualified anomaly detection provides detection and triggering on specific analog anomalies and/or digital data within a qualified area of a serial data stream. A start pattern within the serial data stream, such as a packet header, is detected to generate an enable signal. A stop event, such as a packet trailer, a specified digital event, a time interval or the like, is identified to generate a disable signal. The enable and disable signals are combined to produce a qualification signal that allows a trigger circuit to trigger on a specified anomaly within the portion of the serial data stream defined by the qualification signal.
Claims20
A method of qualifying a trigger event comprising the steps of:
- detecting a start pattern in a serial data stream to provide an enable signal for a trigger circuit;
- and
- identifying a predetermined data pattern indicative of a stop event after the start pattern to provide a disable signal for the trigger circuit so that the trigger circuit provides a trigger signal only when the trigger event occurs in the serial data stream between the start pattern and the stop event.
A trigger qualification circuit comprising:
- means for detecting a start pattern in a serial data stream to provide an enable signal for a trigger circuit;
- means for identifying a predetermined data pattern indicative of a stop event after the start pattern to provide a disable signal for the trigger circuit so that the trigger circuit is enabled to provide a trigger signal only in the interval between the start pattern and the stop event.
Dependencies are inferred from the claim text.