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A Method of Improving the Waveform Capture Rate of Hybrid Oscilloscope's Digital Channel

A waveform capture rate, digital channel technology, applied in the field of testing, can solve the problems of long acquisition blind area, long transmission time, neglect, etc., and achieve the effect of fast conversion speed and reduced time loss

Active Publication Date: 2016-06-22
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
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Problems solved by technology

[0005] The data processing method of the digital channel in the existing hybrid oscilloscope has the following problems: (1) the whole acquisition, data conversion and storage, and display are all processed in a serial manner. It accounts for a very small part of the whole data processing; (2) The conversion of sampling point and pixel point is realized by the application software of CPU, and CPU spends a lot of time on processing the obtained waveform data and displaying, so it will be in the process of data processing During the process, all signal activities occurring at the same time are ignored, resulting in a long collection blind area; (3) all collected data is transmitted to the memory through the CPU bus, the data volume is large, the transmission time is very long, and a lot of time is wasted on data transmission

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  • A Method of Improving the Waveform Capture Rate of Hybrid Oscilloscope's Digital Channel
  • A Method of Improving the Waveform Capture Rate of Hybrid Oscilloscope's Digital Channel
  • A Method of Improving the Waveform Capture Rate of Hybrid Oscilloscope's Digital Channel

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] For digital waveforms, the pixels of each channel on the screen only have three states: high, low, and transition. Therefore, you only need to know whether there is a jump in the data on the pixel of the channel. If there is no jump, the two information of whether the data is "high" or "low" can draw an accurate digital waveform, but the two information To obtain, it is often necessary to judge all the sampling points.

[0028] The present invention pr...

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Abstract

The invention provides a method for improving a digital channel waveform capture rate of a mixed oscilloscope. A data acquisition module, a sampling point and pixel point conversion module and a pixel point storage module are realized through FPGA, and data acquisition and screen pixel point generation are completed by employing a parallel processing mode. According to the method, acquisition, processing, storage and display of the data are realized completely through the FPGA, the parallel processing mode is employed, and a conversion speed is fast; when the mixed oscilloscope is in an operation mode, only a small amount of pixel point data is needed to transmit, transmission of original acquired data is not needed, and time loss of data transmission is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a method for improving the digital channel waveform capture rate of a hybrid oscilloscope. Background technique [0002] Hybrid oscilloscope is a new type of test instrument developed on the basis of digital oscilloscope and logic analyzer. The hybrid oscilloscope not only has the characteristics of multiple channels and multiple trigger modes of a logic analyzer, but also has the detailed observation of signal amplitude and powerful parameter measurement functions of the oscilloscope, and can realize mixed triggering and synchronous analysis of digital signals and analog signals. Therefore, the hybrid oscilloscope is more suitable for the signal integrity test requirements of high-speed complex systems. [0003] Digital channels in a hybrid oscilloscope display significantly differently than a traditional logic analyzer. First of all, when using a logic analyzer, the user must...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R13/02
Inventor 刘洪庆孙龙陈秋伟姜正吉张成森
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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