Oscilloscope Post Processing System for Independent Time and Frequency Domain Control
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Solution Overview
Problem
Oscilloscopes face limitations in independently controlling time-domain and frequency-domain parameters due to the shared use of signal samples for both domains, leading to reduced flexibility in data analysis.
Innovation Solution
The oscilloscope post processing system includes an acquisition memory that stores signal samples and an interval selector that allows independent selection of samples for time-domain and frequency-domain processing, enabling separate configuration of parameters for each domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the same samples are used for both time-domain and frequency-domain processing, then memory usage is reduced, but the flexibility of independently controlling parameters in each domain is reduced
Solution Approach 1:
The patent divides the sample data into separate segments: original samples stored in acquisition memory and copied samples stored in a separate buffer memory. This segmentation allows independent processing parameters for time-domain (using original samples) and frequency-domain (using copied samples) analysis, resolving the contradiction between memory efficiency and parameter flexibility.
Solution Approach 2:
The patent introduces a sample copying mechanism as an intermediary between the acquisition memory and the processing paths. The copied samples act as a mediator that enables independent frequency-domain processing without constraining time-domain parameter settings, thus maintaining flexibility while managing memory resources.
2Adaptability or versatility
If separate memory is allocated for time-domain and frequency-domain signals, then parameter independence is achieved, but memory requirements increase
Solution Approach 1:
The patent uses sample copying from acquisition memory to a buffer memory, creating a duplicate dataset that can be processed independently for frequency-domain analysis. This copying approach enables parameter independence between time and frequency domains while avoiding the need to store completely separate full-resolution datasets, thus controlling memory requirements.
Solution Approach 2:
The buffer memory serves multiple functions: storing copied samples for frequency-domain processing, enabling independent parameter control, and supporting various analysis types. This multi-functionality reduces the need for dedicated separate memory allocations for each processing domain.
3Measurement precision
If the record length is increased for spectrum calculation, then resolution bandwidth and frequency span requirements are met, but the time interval flexibility for time-domain waveform display is reduced
Solution Approach 1:
The patent segments the processing paths by using original samples for time-domain waveform display and copied samples for frequency-domain spectrum calculation. This allows the record length for spectrum analysis to be optimized for resolution bandwidth requirements while the time-domain display can independently optimize its time interval, eliminating the coupling between these parameters.
Solution Approach 2:
The system dynamically allocates processing resources by copying samples to a buffer that can be independently configured for frequency-domain analysis. This dynamic approach allows the time-domain and frequency-domain processing to have different record lengths and parameter settings simultaneously, providing adaptability to different measurement requirements.
Data Source
AI summary
The present disclosure provides an oscilloscope post processing system for an oscilloscope, the oscilloscope post processing system comprising an acquisition memory that stores samples that represent at least one signal acquired by the oscilloscope, and an interval selector that is coupled to the acquisition memory and reads at least some of the stored samples from the memory and outputs at least one first set of the stored samples and at least one second set of the stored samples. Further, the present disclosure provides a respective method, and a respective measurement device.