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A High Refresh Rate Waveform Mapping Method and Digital Oscilloscope
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A mapping method and refresh rate technology, applied in digital variable display, digital variable/waveform display, instruments, etc., can solve problems such as lower refresh rate, lower waveform refresh rate, and inability to process parallel waveforms in multiple columns
Active Publication Date: 2022-05-17
SHENZHEN CITY SIGLENT TECH
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[0006] To sum up, regardless of the number N of points to be displayed in each column, the waveform mapping mechanism adopted in the prior art can only process the waveform column by column, so that when N is less than L, the waveform cannot be processed in parallel in multiple columns. The refresh rate is reduced; the waveform needs to be mapped codeword by codeword when performing column mapping, so that the processing time of each column is not only related to the number of points N displayed in each column (ceil(N / L)), but also related to the signal amplitude C max -C min There is a relationship, but as the signal amplitude becomes larger, the processing time of each frame will also increase, which will result in a decrease in the waveform refresh rate
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Embodiment 1
[0029] Please refer to figure 1 , the present application discloses a waveform mapping method with a high refresh rate. The waveform mapping method includes steps S100-S400, which will be described respectively below.
[0030] Step S100, continuously acquire multi-frame acquisition data of the signal, where each data point in the acquisition data is sequentially numbered according to the output order.
[0031] It should be noted that each data point in the collected data has a position number in the effective data stream, and the data point is output sequentially according to the position number. For example, in the effective data stream, the data number of the first clock is {L-1,L-2,..1,0}, the data sequence number of the second clock is {2L-1,2L-2,..L+1,L}, and the data sequence number of the third clock is {3L-1,3L-2,..2L+1,2L}, and so on, each data point can be marked. However, in this embodiment, each data point in each frame of collected data is sequentially numbered ...
Embodiment 2
[0057] Please refer to FIG. 6 , on the basis of the waveform mapping method disclosed in Embodiment 1, this application also discloses a digital oscilloscope 1 correspondingly, which includes a cache module 11 , an encoding module 12 , a statistics module 13 and a waveform display module 14 .
[0058] The buffer module 11 is used to continuously acquire multi-frame acquisition data of the signal, and buffer each frame of acquisition data, and each data point in each frame of acquisition data is sequentially numbered according to the output order. The buffer module 11 can be connected with a signal sampling component (such as an ADC conversion module) in the digital oscilloscope, and buffer the digitized data after sampling, interpolation or trigger position synchronization.
[0059] The coding module 12 is connected with the cache module 11, and is used to compile each data point into a corresponding display column according to the numbering of each data point in each frame of ...
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Abstract
A waveform mapping method with a high refresh rate and a digital oscilloscope, comprising: continuously acquiring multi-frame acquisition data of a signal (S100); editing each data point in each frame of acquisition data into a corresponding display column, utilizing each data The code value of the point and the sequence number of the displayed column form the coordinate code (S200) of the data point; the number of times each data point appears at the corresponding coordinate code in the collected data of each frame is counted to obtain the column histogram statistical result, and the statistical results for each The maximum code value and the minimum code value appearing in each display column obtain column peak statistical results (S300); control the waveform mapping of the signal according to the statistical results, and refresh the display brightness of each pixel in the waveform mapping area (S400). The waveform mapping method can use the statistical value mapping mechanism to replace the separate mapping mechanism for each frame used in the prior art, which can avoid the situation that each frame of data needs to be mapped separately, reduce the overhead time caused by waveform mapping, and improve refresh rate. Rate.
Description
technical field [0001] The invention relates to the technical field of digital signal processing, in particular to a waveform mapping method with a high refresh rate and a digital oscilloscope. Background technique [0002] When doing modern electronic design, engineers need to pay special attention to the instantaneous abnormal signals in electronic signals, such as jitter, short pulse, low-frequency interference and instantaneous errors, etc. It is often necessary to use an oscilloscope to capture such abnormal signals and analyze and display them . The waveform refresh rate is used to indicate the maximum number of times the oscilloscope can capture waveforms per second, and it is one of the important indicators for judging the performance of a digital oscilloscope. Generally, the higher the waveform refresh rate, the shorter the dead time of the oscilloscope, and the stronger the ability to capture abnormal signals. Therefore, designing a higher waveform refresh rate is...
Claims
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