Oscilloscope Trigger Condition Determination for Rare Signal Events
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Solution Overview
Problem
Conventional digital oscilloscopes struggle to automatically detect rare or sporadic signal events due to high sampling rates, leading to missed registrations during blind time, requiring manual adjustment of trigger conditions for repeated measurements.
Innovation Solution
A method and device that determine level-based and time-based parameters for signal frequencies of occurrence before sampling, allowing for the automatic adjustment of trigger conditions by identifying differences between these frequencies and reference frequencies to generate a trigger signal for rare events, enabling efficient detection and analysis of sporadic signal events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sampling rate is increased to capture rare signal events, then the detection capability improves, but the blind time increases causing more rare events to be missed
Solution Approach 1:
The patent performs preliminary determination of trigger conditions by analyzing level-based and time-based parameters from sampled values before actual acquisition. This preliminary analysis identifies characteristics of rare events, allowing the system to set appropriate trigger conditions in advance, thereby reducing blind time while maintaining detection capability.
2Measurement precision
If manual adjustment of trigger conditions is performed repeatedly to detect rare events, then the detection accuracy improves, but the measurement time increases significantly
Solution Approach 1:
The patent enables automatic determination of trigger conditions by analyzing level-based parameters (amplitude, voltage levels) and time-based parameters (duration, interval) from sampled values. The system self-adjusts trigger conditions based on detected signal characteristics, eliminating the need for manual repeated adjustments and significantly improving measurement efficiency while maintaining detection accuracy.
3Stability of the object's composition
If conventional trigger conditions are used for repeated measurements, then the system stability is maintained, but the ability to detect unknown rare events deteriorates
Solution Approach 1:
The patent dynamically adapts trigger conditions based on real-time analysis of signal characteristics. By determining level-based parameters (signal amplitude, voltage thresholds) and time-based parameters (event duration, time intervals) from sampled values, the system automatically adjusts trigger conditions to match detected rare event patterns, providing both stability through systematic analysis and adaptability through dynamic condition modification.
Data Source
AI summary
A method and a device for determining a trigger condition for presenting a registered signal on a display of an oscilloscope on the basis of a rare signal event in the registered signal. The method and device determines a level-based and/or time-based distribution of frequencies of occurrence from level-based and/or time-based parameters determined from sampled values of the registered signal in a specified corresponding level-raster and/or time raster, and compares the determined level-based and/or time-based distribution of frequencies of occurrence with a previously given corresponding level-based and/or time-based reference-distribution of frequencies of occurrence. A first trigger condition is determined dependent upon an identified difference between corresponding level-based and/or time-based distribution of frequencies of occurrence and corresponding level-based and/or time-based reference-distribution of frequencies of occurrence. A trigger signal is activated if the trigger condition in the registered signal has been overstepped or undercut.