使用85052B校准套件校准N5230A网络分析仪要求连接低频带负载

> {quote：title = srms写道：} {quote}>嗨，>>我正在使用85052B校准套件校准N5230A网络分析仪。
在此过程中，它要求连接低频带负载，但85052B只有宽带负载。
如果我连接宽带负载而不是低频负载会有什么不同吗？
（我知道低频段是>谢谢你我不确定，但我相信你只是使用宽带负载。我的理解是旧的负载只被评定为几GHz，并被称为低频带负载，因为
它们用于低频率和较高频率的滑动负载。但制造方面的改进意味着固定负载现在在较高频率下更好，因此被称为宽带负载。当然，滑动负载，如果使用得当，将在以下方面提供更好的结果。
频率高于宽带负载。我有一个相当旧的HP 85052B校准套件，负载标记为低频带。该术语用于较旧的85052B校准套件的手册。这些低频负载现已过时且更换
在我的旧85052B校准套件中，公头低频带负载是部件号85052-60010。如果将该部件编号放入安捷伦的“查找部件”中，可以看到它已过时并被00902-60003取代。
然而，那部分也是过时的和r
由00902-60005替代，这是当前的产品。
这是当前版本的Agilent 85052B中使用的宽带负载。
也就是说，85050B 7 mm校准套件包括低频带负载（00909-60003）和宽带负载（85050-60006）。
从DC到2 GHz，低频带负载的回波损耗规定为≥52dΒ，但宽带负载从DC到18 GHz的回波损耗≥38dΒ。
显然，在85050B校准套件中，使用2 GHz以下的低频带负载将比使用在更宽频率范围内优化的宽带负载更好。
我相信安捷伦的一位大师会对此有所了解，但无论如何这些都是我的想法。
DaveEdited：drkirkby于2013年7月25日下午7:46



     以下为原文

  > {quote:title=srms wrote:}{quote}
> Hi,
> 
> I am Calibrating N5230A network analyzer using 85052B calibration kit. In the process it asks to connect a lowband load but in 85052B only  has broadband loads. If i connect broadband load instead of lowband load does it make any difference? (I know that low band is  
> Thank you

I'm not sure, but I believe that you just use the broadband loads. 

My understanding is that older loads are only rated to a couple of GHz, and were called low band loads, since they were used at low frequencies and the sliding loads at higher frequencies. But improvements in manufacturing mean the fixed loads are now better at higher frequencies and so are called broadband loads. Of course a sliding load, if properly used, will give better results at high frequencies than what a broadband load will. 

I have a rather old HP 85052B calibration kit and the loads are marked as low band. That term is used in the manual for the older 85052B cal kits. Those lowband loads are now obsolete and the replacements are broadband loads. In my old 85052B cal kit, the male low band load is part number 85052-60010. If one puts that part number into Agilent's "Find a part", one see it is obsolete and replaced by the 00902-60003. However, that part too is obsolete and replaced by the 00902-60005, which is a current product. That is a broadband load used in current versions of the Agilent 85052B. 

That said, the 85050B 7 mm cal kit includes both a low band load (00909-60003) and a broad band load (85050-60006). The return loss of the low band load is specified to be ≥ 52 dΒ from DC to 2 GHz, but the broadband loads have a return loss of ≥ 38 dΒ from DC to 18 GHz. Clearly in the 85050B cal kit, using the low band load under 2 GHz would be better than using the broadband load which is optimised over a wider frequency range. 

I'm sure one of the Agilent gurus will shed more light on this, but those are my thoughts anyway. 

Dave

Edited by: drkirkby on Jul 25, 2013 7:46 PM

戴夫，非常感谢你的回复。



     以下为原文

  Dave,

Thank you very much for the reply.

您好，我可以确认，正如Dave所说，85052B校准套件定义标签使用术语“低频负载”，它确实是指实际上称为“宽带负载”的负载。
PNA的85052B校准套件定义还包括相同负载标准的单独“宽带负载”定义，如果您要编辑85052B校准套件定义以移除滑动负载标准定义，那么实际上可以使用那些相同的物理固定负载
代替宽带意义上的滑动负载。
然而，当你使用滑动负载时，你当然会得到更高质量的cal，否则你会得到更具成本效益的85052D套件:-)。



     以下为原文

  Hello, I can confirm that as Dave said, where the 85052B cal kit definition labels use the term "lowband load" it indeed refers to the load which actually says "Broadband Load" on it.  The PNA's 85052B cal kit definition also includes a separate "broadband load" definition of the same load standard, where if you were to edit the 85052B cal kit definition to remove the sliding load standard definitions, then those same physical fixed loads could actually be used in place of the sliding loads in a more broadband sense.  However you of course in general get a higher quality of cal when using the sliding loads or else you would have the more cost-effective 85052D kit instead :-).