视频信号触发NI的高速数字化仪(示波器)
主要软件:
主要软件版本: 1.1
主要软件修正版本: N/A
次要软件: LabVIEW Development Systems>>LabVIEW Professional Development System
硬件: Modular Instruments>>High-Speed Digitizers (Scopes)>>PCI-5122, Modular Instruments>>High-Speed Digitizers (Scopes)>>PCI-5114, Modular Instruments>>High-Speed Digitizers (Scopes)>>PCI-5122, Modular Instruments>>High-Speed Digitizers (Scopes)>>PXI-5142, Modular Instruments>>High-Speed Digitizers (Scopes)>>PCI-5142, Modular Instruments>>High-Speed Digitizers (Scopes)>>PXI-5114, Modular Instruments>>High-Speed Digitizers (Scopes)>>PXI-5124, Modular Instruments>>High-Speed Digitizers (Scopes)>>PCI-5124, Modular Instruments>>High-Speed Digitizers (Scopes)>>PXI-5122
问题: 我正在开发一个视频信号采集应用,通过视频信号的高低来触发采集功能。哪一款NI的高速数字化仪(示波器)支持视频触发,并且支持哪些视频格式呢?
解答: 有四款NI的高速数字化仪支持视频信号触发,它们分别是NI-5114/5122/5124/5142.这四款设备都支持标准定义视频信号(SDTV),但是只有NI-5114支持EDTV和HDTV。关于支持的信号格式与NI高速数字化仪的对应关系,请参照下表:


如果要在LabVIEW中使用高速数字化仪的视频触发功能,需要使用NIScope Configure Trigger (polymorphic) VI,并且为一下几个输入参数创建输入控件或者常量:
· Trigger Source
· Enable DC Restore
· Signal Format
· Polarity
· Trigger Coupling
· TV Event
相关链接: NI Developer Zone: NI-5122/5124 Video Triggering NI Developer Zone: Anatomy of a Video Signal Set-Top Box and Blu-ray Player Testing
附件:
报告日期: 10/24/2008
最近更新: 07/28/2015
文档编号: 4QNDNHVP
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