我知道有人拥有8751A VNA和87511B 75欧姆测试装置。他不需要75欧姆，并希望将其用作50欧姆的VNA。这样做涉及什么？他的印象是75欧姆的测试装置基本上是一个50欧姆的测试装置，里面装有最小的损耗垫，所以认为将它们拆下来很简单，但现在我认为他已经得出结论并不是那么简单。 87511A是50欧姆，但87511B是75欧姆。如果只是在外部放置最小损耗焊盘以转换75欧姆的测试装置，请将VNA中的系统阻抗设置为50欧姆，然后使用50欧姆校准套件？还有什么需要做的吗？戴夫 以上来自于谷歌翻译 以下为原文I know someone who has got a 8751A VNA with an 87511B 75 Ohm test set. He has no need for 75 Ohms, and wants to use this as a 50 Ohm VNA. What is involved in doing this? He was under the impression the 75 Ohm test set was basically a 50 Ohm test set with minimum loss pads inside, so thought it would be simple to just remove them, but now I think he has concluded it is not as simple as that. The 87511A is 50 Ohms, but the 87511B he has is 75 Ohms. Should one just put minimum loss pads externally to convert the 75 Ohms of the test set, set the system impedance in the VNA to be 50 Ohms, then use a 50 Ohm calibration kit? Is there anything else one needs to do? Dave
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