A conversion calculation method of waveform display data of digital phosphor oscilloscope

Abstract

The invention discloses a method for converting and displaying waveform display data of a digital fluorescent oscilloscope. The frequency values of the waveforms of each point under the statistics are converted to display brightness component values by a method that is easy to implement by hardware and the display brightness component values can be changed and converted according to the display brightness set by the user to acquire the display data in the RGB format. When a waveform frequency value is converted to a display luminance component value, firstly, the frequency value interval of the waveform is segmented according to the approximate logarithmic relation, and the linear frequency compression method is adopted to convert the frequency value to the luminance component value in each section, thus, when the high-frequency value is converted, the compression ratio is large, and when the low-frequency value is converted, the compression ratio is smaller, so that the waveform points with high frequency and low frequency waveform points can be effectively displayed in the signals under test, and also easy to realize by hardware circuit; meanwhile, the original waveform information can be completely preserved.

Description

technical field [0001] The invention relates to a digital phosphor oscilloscope waveform display method, which belongs to the technical field of digital phosphor oscilloscope display. Background technique [0002] In recent years, the measurement of dynamic and complex signals has challenged engineers and technicians. The first generation of analog real-time oscilloscopes (ART) and the second generation of digital storage oscilloscopes (DSO) seem helpless. So the third generation of oscilloscope - digital phosphor oscilloscope (DPO) came into being. Digital phosphor oscilloscopes use dedicated hardware circuits for real-time digital phosphor processing of waveform acquisition, making the capture update rate of waveforms as high as hundreds of thousands of frames per second or even millions of frames per second, which is much higher than the most advanced DSO. Therefore, it can capture image Occasional signals such as glitches and short pulses; at the same time, digital pho...

AI Technical Summary

Problems solved by technology

The commonly used linear compression conversion adopts the same compression ratio for waveform points with high frequency of occurrence and waveform points with low frequency of occurrence. After compression, some display information of waveform points with low frequency of occurrence will often be lost, especially when the waveform When the frequency of occurrence of each point in the value differs greatly, those waveform points that only appear a few times will be lost due to compression, so that users cannot observe these occasional signals

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