US 2003/0158706 A1 · Instrument timing using synchronized clocks

Abstract

An instrumentation system which provides relatively precise time correlation among obtained measurements without dependence on trigger signal timing. An instrumentation system according to the present teachings includes a set of instruments each having a clock and an event buffer for periodically logging a data record. Each data record includes a set of measurement data and a time-stamp obtained from the corresponding clock. The instrumentation system includes mechanisms for maintaining a synchronized time in the clocks and mechanisms for stopping the logging in the event buffers in response to an event of interest. Once event logging is stopped, the data records in the event buffers may be correlated using their time-stamps and a time-stamp associated with the event of interest.

Claims17

Dependent claims

An instrumentation system, comprising:

a set of instruments each having a clock and an event buffer for periodically logging a data record each data record comprising a set of measurement data and a time-stamp obtained from the corresponding clock;
means for maintaining a synchronized time in the clocks;
means for stopping the logging in the event buffers in response to an event of interest;
means for correlating the data records in the event buffers in response to a time-stamp associated with the event of interest.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/077,550Filed 15 Feb 2002

Published

21 Aug 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01R 31/31937
With comparison between actual response and known fault free response: timing aspects, e.g. measuring propagation delay
G01R 31/31907
Tester configuration: modular tester, e.g. controlling and coordinating instruments in a bus based architecture
G06F 1/14
Generating or distributing clock signals or signals derived directly therefrom: time supervision arrangements, e.g. real time clock
G01R 31/31922
Stimuli generation or application of test patterns to the device under test [DUT]: timing generation or clock distribution

Abstract

Facts

Application

10/077,550Filed 15 Feb 2002

Published

21 Aug 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01R 31/31937
With comparison between actual response and known fault free response: timing aspects, e.g. measuring propagation delay
G01R 31/31907
Tester configuration: modular tester, e.g. controlling and coordinating instruments in a bus based architecture
G06F 1/14
Generating or distributing clock signals or signals derived directly therefrom: time supervision arrangements, e.g. real time clock
G01R 31/31922
Stimuli generation or application of test patterns to the device under test [DUT]: timing generation or clock distribution

Instrument timing using synchronized clocks

Life of this patent

Abstract

Claims17

Instrument timing using synchronized clocks

Life of this patent

Abstract

Claims17