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动态信号分析仪（DSA）板卡的RTSI线与定时
硬件: Modular Instruments>>Dynamic Signal Acquisition and Analysis (DSA)>>PXI-4472
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问题: 我正在使用RTSI总线来同步两块美国国家仪器公司的板卡。哪一个计数器会为我AI_Start_Trigger 或者AI_Stop_Trigger的产生正确的时钟？如果我有两块从板卡我又该怎么办？哪一个连接端子物理输出时钟信号脉冲？
解答: 如下信息适用于NI-DAQ 6.5以后的版本。
- 当一块NI 44xx板卡在主/从关系中作为从板卡时，当它从RTSI总线接收 AI_Start_Trigger或者 AI_Stop_Trigger信号时，该板卡上的GPCTR0会被NI-DAQ使用从而产生正确的时钟信号。
- 如果你有两块从板卡，那么与之对应需要两个GPCTR0。主板卡（产生触发信号的板卡）并不需要GPCTR0。
- 当NI-DAQ使用GPCTR0时，时钟脉冲将通过GPCTR0_OUT端子输出。
相关链接: KnowledgeBase 36JDIT2L: Which RTSI Pin Carries the Master Clock when Synchronizing Multiple PCI DSA Boards? KnowledgeBase 3EE7N2NQ: Synchronizing Dynamic Signal Acquisition (DSA) Products with NI- DAQmx Developer Zone Tutorial: Dynamic Signal Acquisition (DSA) Synchronization Basics KnowledgeBase 0Z98SOYP: RTSI Connector Pinout
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报告日期: 09/16/2002
最近更新: 01/29/2013
文档编号: 2PFE6EMQ