E8364B PNA网络分析仪无法定位Ecal模块

你好。
根据您引用的端口名称，我觉得您将E8364B与外部测试集的N441x型号一起使用。
该系统的默认“逻辑到物理端口映射”是：1 =“PNA1”，2 =“TS1”，3 =“PNA2”，4 =“TS2”。
每当测试端口的PNA接收器无法测量从连接到该端口的ECal端口反射的信号时，ECal自动定向通常会失败，原因可能是功率太低，或者路径中连接的外部衰减器使其太低，或者
如果有什么东西阻止信号被接收。
如果你有一个简短的或开放的标准，我建议将该标准连接到端口PNA2并进行原始（即未校准）S33测量，看看是否显示出相当数量的反射信号被测量。
或者，您也可以在PNA1和PNA2之间建立直通连接，并查看S31和S13的原始测量结果是否合理（波纹和一定数量的dB向下但显示接收到的信号）。
我的第一个猜测是，右侧的PNA和测试仪之间的一根或多根跳线可能已经松动，扭结或交叉连接而不是预期的连接。



     以下为原文

  Hi.  Based on the port names that you referenced, it sounds to me like you're using your E8364B together with one of the N441x models of external testset.  The default "logical to physical portmapping" for that system is: 1 = "PNA1", 2 = "TS1", 3 = "PNA2", 4 = "TS2".  ECal auto-orientation generally fails whenever the PNA receiver for a testport has trouble measuring the signals reflected from the ECal port attached to that port, either because the power is too low, or an external attenuator connected in the path makes it too low, or if somehow something's blocking that signal from being received at all.  If you have a short or open standard handy, I'd suggest connecting that standard to port PNA2 and make a raw (i.e. uncalibrated) S33 measurement, and see if that seems to show a decent amount of reflected signal being measured.  Alternatively you might also make a thru connection between PNA1 and PNA2 and see if raw measurements of S31 and S13 seem reasonable (ripply and some number of dB down but showing the signal received).  My first guess would be that one or more of the jumper cables between the PNA and testset on the righthand side may have gotten loose, kinked or cross-connected versus the intended connections.