【正文】 虛擬數(shù)字存儲(chǔ)示波器中英文資料外文翻譯文獻(xiàn) Virtualdigital storage oscilloscope Virtual digital storage oscilloscopethe structure and position： Virtual digital oscilloscope PXI bus from a multifunctional data acquisition card and the corresponding software. They will be installed on a PC running Windows, constitutes a powerful can store digital oscilloscope. Data Acquisition The design of NI is used by the pany39。s multipurpose data acquisitioncardPXI6670E, its main functions are as follows: 64way singleended / 32way differential analog input。 12 accuracy。 MSPS sampling speed。 MSPS disk write speed 。 177。 ~ 177。 10V input range。 twoway 12 analog outputs。 eight digital I/ 24 counter /timer. Functional equipment In this case virtual digital oscilloscope with realtime data acquisition, spectralanalysis and window treatment and filtering capabilities. In the virtual digital oscilloscope main panel on data collection and analysis of the spectrum, and window processing, filtering and other function keys, according to the corresponding button we can enter into the appropriate subpanel. Software Design and Implementation Virtual digital oscilloscope software design based on the use of Clanguage programming environment LabWindows / CVI. LabWindows / CVI support numerical type, Boolean, and the string of text, and other data types, but the biggest advantage is through dialog forms of interactive operations generate standard C code. In addition LabWindows / CVI provides a very rich debug tools, including singlestep, breakpoints, variable view, monitor window, and so on, these features make the adjustment process has bee more vulnerable. The main function modules Virtual digital oscilloscope mainly by the software control signals the pletion of the acquisition and display processing, data collection in the main panel to plete the following features: Setting up access, set up sampling frequency, set up a manner that waveform, data collection in the main panel to plete the following Features: Acquisition of realtime signal and the signal on its own spectrum analysis, see lines, and other functions, and window panels dealing with the acquisition of realtime signal and the signal to increase processing windows (including windows Haiming, Hamming window, Buiakean smoothing windows and window, etc.).Filtering in handling panel includes the following features: the acquisition of realtime signal and the signal on its own filtering treatment (including singlestep filtering, multistep filtering method and tradit ional methods, etc.) The source files generated when the control panel to plete the set, you can have a function of the code of procedure. Specific methods for: to have pleted the panel as a response to the current state of the [Code] menu, select [Generate] in the [All Code], in the popup dialog function selected in the main panel and withdraw from the function , And the user interface will be able to produce documents relative to the framework of the code function. Add the code generated automatically step on the corresponding control is a function of the framework, to make certain controls to plete the function, we must add code to control the controls. One main () function is the entrance procedures, it is the function of initialization procedures, loading the user and display panels, such as to plete other functions required to add code. Following the code for data acquisition functions, data acquisition process by calling the callback function button SHOU external acquisition. Software development environment: virtual digital oscilloscope software design based on the use of Clanguage programming environment LabWindows / CVI. LabWindows / CVI support numerical type, Boolean, and the string of text, and other data types, but the biggest advantage is through dialog forms of interactive operations generate standard C code. In addition LabWindows / CVI provides a very rich debug tools, including singlestep, breakpoints, variable view, monitor window, and so on, these features make the adjustment process has bee more vulnerable. Have the function ★ function with realtime display: Acquisition Acquisition signal to the input signal and realtime display in a PC terminal. ★ digital filtering: IIR filter on the use of digital signal processing and realtime filtering, at the same time filter can be set up in the best approximation function type, filter type, order, from top to bottom cutoff frequency, and other parameters. ★ latest wave show: to meet the transient waveform display, but can also be transient waveform to be saved. ★ waveform storage: at any time after the original signal or signals to the LVM LabVIEW unique file format stored on the local hard drive, for future analysis or processing. One transient signal to the cutoff wave after BMP format images stored in local hard 上供 view and analysis of the future. ★ significant wave back: to keep the memory of the LVM format waveform reread the document and then displayed on a PC client. ★ spectrum analysis: After the filter frequency signal respectively corresponding analysis and response analysis of the frequency and wave at the same time to show realtime manner and form. Basic principles the use of hardware acquisition card acquisition signals, using software provided by NI DAQmx READ acquisition signals, and then through Waveform Graphs to conduct realtime display. This has a basic oscilloscope, signal showed that after using Write To Measurement File waveform will be saved as LVM documents. This realization of the basic store function, but through Read To Measurement File can be read LVM, thus pleting the echo feature. As the hardware and the acquisition of PCcardbased, so the limit of sampling oscilloscopes in the rate, bandwidth, resolution, and other p