Digitized Waveform Display with Independent Zoom Tracking
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Solution Overview
Problem
Existing digital oscilloscope roll mode lacks a zoom feature that effectively allows users to analyze short-lived transient events due to the fast movement of waveforms, making it difficult to observe and analyze such events within the display time frame.
Innovation Solution
The apparatus includes an overview display and a zoom display with a control unit that allows the zoom display to track a portion of the digitized waveform, maintaining the display of the zoomed portion at the time of user input while new samples continue to appear, effectively 'freezing' the zoom display to allow detailed analysis without losing data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If zoom display is implemented in roll mode with same sample rate as main display, then waveform detail can be examined, but the waveform moves too quickly through the zoom display for short-lived events to be visible
Solution Approach 1:
The patent applies dynamics by making the zoom display's time base adjustable and independent from the main display. The control unit allows users to modify the time base of the zoom display separately, enabling the waveform to be displayed at different speeds in the zoom region while maintaining the same acquisition rate in the main display. This dynamic adjustment allows short-lived events to be visible for extended periods in the zoom display without affecting the overall roll mode operation.
2Productivity
If acquisition rate is increased to capture more data, then more waveform information is available, but the waveform moves faster across the screen making short events invisible
Solution Approach 1:
The patent segments the display into a main display region and a zoom display region, each with independent time base control. The main display continues to operate at the original acquisition rate to capture all waveform data, while the zoom display can be configured with a slower time base to extend the observation period for specific events. This segmentation allows simultaneous high-speed data capture and detailed event examination.
3Measurement precision
If time base is reduced to zoom in on waveform details, then short events become more visible, but the waveform appears to move faster through the display
Solution Approach 1:
The patent applies local quality by allowing different time base settings in different regions of the display. The main display maintains the original time base for overall waveform context, while the zoom display region can have a modified, slower time base to reduce the apparent waveform speed and extend event visibility. This local modification of display parameters enables detailed event examination without affecting the global display operation.
Data Source
AI summary
An apparatus for displaying a digitized waveform includes an overview display configured to display a digitized waveform scrolling across the overview display, a zoom display configured to display a portion of the digitized waveform, and a control unit configured to cause the portion of the digitized waveform displayed in the zoom display to track the displayed portion of the digitized waveform in response to a track signal.