Wave form brightness adjustment and correction method of digital three-dimensional oscilloscope

Abstract

The invention discloses a wave form brightness adjustment and correction method of a digital three-dimensional oscilloscope. According to hit probability of a signal sampling point, a user enables to-be-observed wave forms in a hit probability range to be displayed in a highlight mode through wave form brightness adjustment. In forward power law transformation, a wave form brightness grade increases with increase of the hit probability of the sampling point; and in reverse power law transformation, the wave form brightness grade reduces with increase of the hit probability of the sampling point. In the forward power law transformation and the reverse power law transformation, wave form brightness correction parameters can be adjusted to adjust wave form brightness distinguishability, and signals in different hit frequency ranges are conveniently observed. By the method of sectional transformation, the wave form sampling point falling in a certain range of the hit frequency can be specially focused on. According to the wave form brightness adjustment and correction method, wave forms in a specific frequency range can be observed and wave form display brightness can be changed at will, the defect of an existing digital three-dimensional oscilloscope is overcome, and the obtained wave forms can display more detail information.

Description

technical field [0001] The invention belongs to the technical field of digital three-dimensional oscilloscopes, and more specifically relates to a method for adjusting and correcting waveform brightness of a three-dimensional oscilloscope. Background technique [0002] A digital three-dimensional oscilloscope (DTO for short) refers to a digital storage oscilloscope that can not only capture and display the time-amplitude (event) information of a signal, but also display the probability of occurrence of different events with different brightness or color levels ( Digital Storage Oscilloscope, referred to as DSO). Digital 3D oscilloscopes usually have a high waveform capture rate. The waveform capture rate of an oscilloscope refers to the number of waveforms that the oscilloscope can capture and display per unit time, usually expressed in waveform amplitudes / second (wfms / s) (taken from "GB / T 15289-2009 Digital Storage Oscilloscope Specifications" Definition) [0003] The wa...

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Problems solved by technology

[0017] However, when using a digital 3D oscilloscope to observe the abnormal signals that may appear in the continuously recurring periodic signal, since the digital 3D oscilloscope has a high waveform capture rate, multiple waveforms captured in one refresh cycle are displayed on the LCD at the same time. However, because the probability of occurrence of abnormal signals is much lower than that of periodic signals, it is difficult for users to observe abnormal signal waveforms with very dark colors under the above-mentioned mapping relationship of linear uniform transformation, thus losing some details of the waveform and unable to reflect the three-dimensional The Value of High Waveform Capture Rate in Digital Oscilloscopes

In addition, if the user is only interested in the waveform with a certain hit probability when observing the mixed signal, since the probability of signal occurrence in the prior art has a linear and uniform relationship with the display brightness, the waveform of interest cannot be selected from the mixed signal. isolated for observation

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