电测知识分享——测量效率提升神器！FSW频谱仪多通道测量演示教学

[{"insert":"FSW具有多个测量通道，即可以并行定义多个测量配置，然后在通道之间自动切换以按顺序执行测量。本文将通过激活用于不同频率范围的额外测量通道、零跨度测量和I/Q分析来演示此功能。\n \n"},{"attributes":{"bold":true},"insert":"测试系统搭建"},{"insert":"\n"},{"insert":{"image":"https://files.eteforum.com/article/202308/b6fc3cfbb4637dfb.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":" \n"},{"attributes":{"bold":true},"insert":"测试仪器"},{"insert":"\n本次演示的仪器型号为FSW26，大家可以在君鉴科技旗下测试仪器信息服务平台“每日E问”中，查询到这款仪器的产品参数、配置文档等资料，并和其他频谱仪进行对比。\n "},{"insert":{"image":"https://files.eteforum.com/article/202308/495eb1a51af84591.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":" \n"},{"attributes":{"bold":true},"insert":"测试步骤"},{"insert":"\n首先，我们还是将内部校准信号作为输入，并按顺序点击PRESET→Setup→Service + Support，然后选择Calibration Signal校准信号，别忘记Calibration Frequency RF。\n"},{"insert":{"image":"https://files.eteforum.com/article/202308/13aef09fb406b024.png"}},{"insert":" "},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"紧接着，我们将频率设置成64 MHz，并将Span设置成20 MHz，Amplitude SCALE设置成-25 dBm。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/b5fccf962e1f906e.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"此时，我们得到了校准信号的频谱图。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/8992bba569216976.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"然后我们再激活下一个通道。我们先选择Mode，然后在New Channel中选择Spectrum频谱，这便是第二个通道。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/536aa323d2bc6ea5.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"我们将这个通道频率范围跨度设置更大一些，将center frequency设置为500 MHz，将 span设置为1GHz，得到了一个跨度较大的校准信号频谱图。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/a9076f260e6afd5d.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"我们再激活第三个通道。还是选择Mode，然后在New Channel中选择Spectrum频谱，将center frequency设置为64 MHz，点击Zero Span，这便是校准信号的时域显示。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/ef2fa31b7112aad1.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"接下来我们选择Mode，点击IQ Analyzer，再点击Display Config，将Real/Imag (I/Q)图标拖到图表区。"},{"insert":"\n "},{"insert":{"image":"https://files.eteforum.com/article/202308/80e44c938315f003.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"然后再将这个窗口关闭，这就是我们为IQ分析单独创造的通道。"},{"insert":"\n "},{"insert":{"image":"https://files.eteforum.com/article/202308/14376bc43d88dfc0.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"现在我们一共有四个通道，此时点击左上角的"},{"attributes":{"color":"#000000"},"insert":"MultiView，就可以在同屏显示所有测量通道了。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/6edad8a519016c19.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"测试步骤如下图所示。"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":" "},{"insert":{"image":"https://files.eteforum.com/article/202308/5e3da15c3749b609.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"attributes":{"bold":true},"insert":" "},{"insert":"\n"},{"attributes":{"bold":true},"insert":"分析总结"},{"insert":"\n"},{"attributes":{"color":"#000000"},"insert":"测试结果截图如下图所示："},{"insert":"\n "},{"insert":{"image":"https://files.eteforum.com/article/202308/e59442f85d522d63.png"}},{"attributes":{"align":"center"},"insert":"\n"},{"insert":"——作者 君鉴科技/谭鑫"},{"attributes":{"align":"right"},"insert":"\n"},{"insert":"——来源 每日E问eteforum"},{"attributes":{"align":"right"},"insert":"\n"}]