Design of Control Board of Automatic Testing System for LNB Based on LabVIEW
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摘要: 低噪声降频放大器LNB的性能直接关系到整个网络的质量,因此,对其性能的测试极其重要。文章介绍了一种基于LabVIEW的LNB自动测试站控制板的设计。该控制板以8255芯片为控制核心,通过检测传感器信号控制待测LNB的位置移动和信号切换,并以LabVIEW为开发平台编写控制板驱动程序,同时模拟返回的定位结束信号。试运行结果表明,该控制板能够实现待测LNB的定位及信号切换,且能够实时显示待测LNB的定位情况Abstract: It is important to test low noise block downconverter for assuring quality of whole network.The paper introduced design of a control board of automatic testing system for LNB based on LabVIEW.The control board takes 8255 chip as control core and controls position movement of tested LNB and signal switch.And it takes LabVIEW as development platform to program drive of control board and simulates returning end signal of positioning at one time.Trial running result showed that the control board can realize positioning of tested LNB and signal switch and display positioning status of tested LNB real-timely.
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Key words:
- low noise block downconverter /
- LNB /
- automatic testing system /
- control board /
- LabVIEW
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