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嗨,我正在使用N5230A来测量适配器。
全局增量匹配是在我使用Ecal执行未知直通之前完成的。 在适配器测量迹线上可以看到涟漪。 怎么解决这个? 谢谢! 以上来自于谷歌翻译 以下为原文 Hi, I'm using N5230A to measure adapter. Global delta match is done before I perform unknown thru cal by using Ecal. Ripples are seen on the adapter measurement trace. How to resolve this? Thanks! |
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我不认为有可能消除涟漪,但不知道它是什么S参数和幅度,没有人会知道它们是否过度。
Dr_Joel的书描述了如何根据涟漪的大小确定各种参数。 戴夫哎呀 - 纠正一个完全改变意义的轻微错字。编辑:drkirkby于2014年6月29日下午3:26 以上来自于谷歌翻译 以下为原文 I don't think it is possible to eliminate ripples, but without knowing what S parameter it is and the magnitude, nobody will know if they are excessive. Dr_Joel's book describes how to determine various parameters based on the magnitude of the ripples. Dave Oops - Correcting a slight typo which completely changed the meaning. Edited by: drkirkby on Jun 29, 2014 3:26 PM |
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我不认为有可能消除涟漪,但不知道它是什么S参数和幅度,没有人会知道它们是否过度。
Dr_Joel的书描述了如何根据涟漪的大小确定各种参数。 Dave *第二次纠正同样的拼写错误,因为我的消息出现了两次。*编辑:drkirkby于2014年6月29日下午3:27 以上来自于谷歌翻译 以下为原文 I don't think it is possible to eliminate ripples, but without knowing what S parameter it is and the magnitude, nobody will know if they are excessive. Dr_Joel's book describes how to determine various parameters based on the magnitude of the ripples. Dave *Correcting the same typo for a second time, since my message appeared twice.* Edited by: drkirkby on Jun 29, 2014 3:27 PM |
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60user7 发表于 2019-3-4 16:30 什么是书名? 以上来自于谷歌翻译 以下为原文 What is the book title? |
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> {quote:title = Ming写道:} {quote}>书名是什么?
“微波元件测量手册:采用先进的VNA技术”http://onlinelibrary.wiley.com/book/10.1002/9781118391242您将在amazon.com上找到D. R. Kirkby的评论 - 就是我。 http://www.amazon.com/Handbook-Microwave-Component-Measurements-Techniques/dp/1119979552/ref=sr_1_4?ie=UTF8&qid=1403869471&sr=8-4&keywords=advanced+microwave Dave 以上来自于谷歌翻译 以下为原文 > {quote:title=Ming wrote:}{quote} > What is the book title? "Handbook of Microwave Component Measurements: With Advanced VNA Techniques" http://onlinelibrary.wiley.com/book/10.1002/9781118391242 You will find a review by D. R. Kirkby on amazon.com - that is me. http://www.amazon.com/Handbook-Microwave-Component-Measurements-Techniques/dp/1119979552/ref=sr_1_4?ie=UTF8&qid=1403869471&sr=8-4&keywords=advanced+microwave Dave |
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涟漪有多大?
PNA-L上的GDM校准通过校准套件的不确定性限制了校准质量。 限制约为0.02-0.04 dB左右。 这将根据GDM校准为所有测量设置涟漪。 在GDM校准中,您必须非常小心地使用良好的电缆进行校准(或者至少在校准期间不要更换电缆。不要弯曲电缆,移动它们非常慢。将它们放在平坦的桌面上。 只做一次GDM校准,所以要小心。另外,如果可以,使用滑动负载校准,使用MF连接。 以上来自于谷歌翻译 以下为原文 how big are the ripples? GDM calibration on a PNA-L has a limit to the quality of the calibration by the uncertainty of the calibration kit. The limit is about 0.02-0.04 dB or so. This will set the ripples for all the measurements based on the GDM cal. In the GDM cal, you must do the calibration very carefully with good cables (or at least not change the cables much during the cal. Don't bend the cables much, move them very slowly. Keep them on a flat table top. You only do the GDM cal one time, so do it carefully. Also, if you can, use a sliding load calibration, use M-F connection. |
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乔尔博士,涟漪约为+/- 0.04。 以上来自于谷歌翻译 以下为原文 Dr Joel, the ripples is around +/- 0.04. |
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你说你在测量适配器:什么样的适配器? 你为每个端口使用的校准套件是什么(除非它是f-f或相同类型的m-f,它需要2个不同的ecals)。 你能发布你的结果图吗? 这是PNA-L测量的预期极限。 一个问题是所使用的电缆即使是良好的电缆也可能具有+ -0.01-0.05的稳定性,因此电缆弯曲会降低测量的性能。 因此,您可以尝试使用Charaterize Adapter宏,并在适配器之前和之后执行两次1端口校准,并使用宏来查找适配器S2p文件。 这将消除电缆弯曲问题。 以上来自于谷歌翻译 以下为原文 you said you were measuring an adapter: what kind of adapter? what is the cal kit you use for each port (unless it is a f-f, or m-f of the same type, it needs 2 different ecals). Can you post a plot of your results. This is at the expected limits of the measurement with the PNA-L. One issue is that the cable used likely has a stability of +-0.01-0.05 even if it is a good cable, and so cable flexure will degrade the measurement. Thus, you might try the Charaterize Adapter macro, and do two 1-port calibrations, before and after the adapter and use the macro to find the adapter S2p file. That will eliminate the cable flexure issues. |
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