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网络分析仪检测信号的基本方法是什么?_广州美达克公司
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网络分析仪检测信号的基本方法是什么?

发布时间:2021-07-16    浏览次数:1023

  网络分析仪检测信号的基本方法是什么?接下来让我们看看!

  矢量网络分析仪是一种电磁波能量测试设备。矢量网络分析仪的原理和力直接取决于系统的动态范围指标,相位波动参数的测试是利用矢量网络分析仪的电子延迟功能实现的。因为只有偏离线性相移才会导致失真,所以我们希望移除相位响应的线性部分。利用网络分析仪的电子延迟功能,可以抵消被测设备的电长,得到与线性相移的偏差,即相位波动。

  在网络分析仪中检测信号有两种基本方法。

  方法一:二极管检测波,二极管检测波提取射频信号输入包络电平,输出电压反映输入信号功率。如果输入信号为连续CW信号和DC检测波,如果输入为幅度调制信号和AC检测波。二极管检测波只反映信号幅度信息,失去了射频载波信号的相位信息。

  方法二:调谐接收器。调谐接收器将输入信号变频,然后通过ADC变成数字量进行处理。这样可以得到信号的相位和幅度信号。

  若使用功率计,则可了解检波器测量信号的特性。第一个检波器是宽带功率测试,即如果检波器的工作频率范围为10M-18G,则其功率显示结果应为该频率范围内存在的所有信号功率和,而无选频测试功能。因此,使用检波器的标量网络分析仪对被测件输出端的失真和杂波信号没有区别,从而导致测试结果出错。

  需要购买Picoscope示波器,欢迎咨询广州美达克数据科技有限公司