数字示波器中的波形存储、录制与回放  

Waveform Storage,Recording and Playback in Digital Oscilloscope

作　　者：郑涛[1] 杨拴科[1] 金印彬[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《现代电子技术》2011年第18期149-152,共4页Modern Electronics Technique

摘　　要：波形存储、录制与回放是数字示波器的重要功能。在此采用闪速存储器(FLASH Memory)存储重要的波形数据,方便用户事后调出观察、分析和对比。每段波形存储的长度固定,根据存储波形的序号、大小、起始地址等建立波形存储索引表,通过查询波形索引表可选择要回放的波形。还可以通过波形录制功能把信号波形录制到静态数据存储器(SDRAM)中,然后回放波形,寻找并观察自己需要的波形。通过直接存储(DMA)方式实现将显示缓冲区存储的波形搬移到波形录制的缓存中去,实现了数据的高速存储。在手持式示波表的研制过程中实现了此波录制和回放方法达到了预期的效果。Waveform storage, recording and playback are the important functions of a digital oscilloscope （DSO）. The FLASH memory is adopted to store the important waveform data. It is convenient for users to call out the waveform informa- tion to observe, analyze and compare. Since the length of each stored waveform is fixed, and the index table of the stored waveforms is established according to their serial numbers, sizes and starting addresses, the waveform that is needed to play- back can be found by querying the index table. Signal waveforms can be also recorded in the static data memory （SDRAM） by the waveform recording function, and then users could find and observe the required waveform by waveform playback. The waveform data stored in display buffer can be moved to the recording buffer though the way of DMA to achieve the high-speed data storage, Waveform storage, recording and playback have been implemented during the development of the handheld oscilloscope. The desired result was achieved.

关 键 词：数字示波器 波形存储 波形录制 波形回放 

分 类 号：TN919-34[电子电信—通信与信息系统] TM933[电子电信—信息与通信工程]