适配器表征宏问题和未知通过两个ecals

没有附加图像。
你想要表征什么样的适配器？
（长度和连接器组合）如果选择正确的DUT连接器组合，校准向导应使用适当的校准套件指导您通过正确的校准序列，以进行未知的校准。
如果你有一个母对母3.5毫米适配器和ECal模块是3.5毫米母对3.5毫米母型，那么默认是使用ECal作为unknonw直通。
您可以通过选择修改校准函数来修改直通类型。
肯



     以下为原文

  There is no image attached.
What kind of adapter you want to characterize?  (length and connector combination)
If you select the correct DUT connector combination, the cal wizard should guide you thru the correct calibration sequence with the appropriate calibration kit for the unknown thru calibration.  If you have a female to female 3.5 mm adapter and the ECal module is a 3.5mm female to 3.5 mm female type, then the default is to use the ECal as the unknonw thru.  You can modify the thru type by selecting the modify cal function.

Ken

我想也许这里的混乱可能源于这样一个事实，即在标准S参数通道的Cal Wizard的第一页上，在适用于N5230A的PNA固件的年份中，“SmartCal”单选按钮包含了一个模糊信息。
括号中所说的“机械校准标准”。
实际上，您可以在PNA固件的那些年份为SmartCal中的“Cal Kits”选择ECal模块，就像今天可以在较新的PNA模型的较新固件版本中那样。
当您选择SmartCal后进入“连接器和套件”页面时，如果您的ECal模块已插入USB并且您选择ECal模块的连接器类型作为DUT连接器选项，则您的ECal将显示为套件选择
列出的机械套件之一。
这使您能够执行涉及多个ECal模块的未知通道，甚至可以为一个端口选择机械校准套件，为另一个端口选择ECal。
在最近的固件中，我们从SmartCal选择中删除了“（机械标准）”标语，因此它只是说SmartCal，但也许我们可以用“SmartCal（机械校准套件和/或ECal）”替换它。
编辑：我看到乔尔已经回复，你已经回复了我发布此回复的时间。编辑：bhokkan于2013年7月26日下午2:08



     以下为原文

  I think maybe the confusion here may stem from the fact that on the very first page of the Cal Wizard for standard S-parameter channels, in the vintages of PNA firmware that apply to the N5230A, the "SmartCal" radio button included a blurb in parenthesis which said "mechanical cal standards".  In actuality, you could choose ECal modules for your "Cal Kits" in SmartCal in those vintages of PNA firmware, as you can today in the newer firmware revs for the newer PNA models.  When you get to the "Connectors and Kits" page after the SmartCal selection, if your ECal modules are plugged-in to the USB already and you pick the ECal module's connector type as your DUT Connector selection, your ECal shows up as a Kit choice among the listed mechanical kits.  That allows you to be able to do an unknown thru cal involving more than one ECal module, or even select mechanical cal kit for one port and an ECal for another port.

In the more recent firmware we removed the "(mechanical standards)" tagline from the SmartCal selection so it just says SmartCal, but perhaps we could have replaced it with " SmartCal (mechanical cal kits and/or ECal)".

Edit: I see Joel already replied and you already responded by the time I posted this response.

Edited by: bhokkan on Jul 26, 2013 2:08 PM

如果在cal向导中选择“ecal”，则只能选择一个。
另一方面，如果选择“Smart Cal”，则可以为不同的端口定义不同的连接器，并且可以使用两个连接。
无论是未知直通还是适配器特性描述都要求你有足够的点跟踪以不包裹相位，顺便说一下，每点需要不到180度。
对于点数较少的宽带扫描和长适配器，有时会导致问题。
最后，如果你有一个固定的设备，并且你的夹具有固定位置连接器，你可能无法在它们之间连接和ecal，即使它们可能是可插入的;
因此，我们允许thru与Ecal thru不同，允许在端口之间连接未知的直通（电缆或你有什么）。



     以下为原文

  If, in the cal wizard, you select "ecal" you only can only choose one.

If, on the other hand, you choose "Smart Cal", then you can define different connectors for different ports and you can use your two ecals.

Both unknown thru and adapter characterization require that you have sufficient points pwer trace to not wrap the phase, by the way, so you need less than 180 degrees per point.  For very wideband sweeps with low number of points, and long adapters ,that can sometimes cause a problem.

And finally, if you have a device that is fixtured, and your fixture has fixed position connectors, you might not be able to connnect and ecal between them, even if they might be insertable; thus we allow the thru to be different from the Ecal thru, to allow an unknown thru (cable or what have you) to be connected between the ports.

对于适配器表征，重要的是要注意以下内容：要表征的设备（探头，适配器......）必须是互逆的（S21 = S12）。
必须执行两个1端口的cals并使用Characterize Adapter应用程序保存到Cal Sets。
两个校准集的频率和点数必须相同，并且频率间隔必须足够小，以允许相位正确地解开。
**关键：为创建S2P文件而执行的计算要求Calset 1始终位于距离PNA最近的一侧，而Calset 2始终位于设备的另一侧。
如果使用生成的S2P文件的应用程序要求反转端口，请选中“反向端口顺序”。
或者学习如何在现有的S2P文件上反转端口顺序。**任何情况下你都可能反转Calset 1和Calset 2的选择。数学很直接。
如果Calset1的误差项来自PNA侧并被转换为T矩阵[N]，则Caliset 2的T矩阵为[NA] = [N] * [A]。
[A]是适配器的T矩阵。
然后[A] = inv [N] * [NA]。
反射跟踪项相当于S21 ^ 2。
请参阅Joel博士关于错误术语和T矩阵的书。
如果矩阵反转，则结果不正确。
请参阅安捷伦应用笔记1364-1，“从矢量网络分析仪中去嵌入和嵌入S参数网络”http://cp.literature.agilent.com/litweb/pdf/5980-2784EN.pdf PNA允许您
使用多个ECal执行未知的直通校准。
您必须选择“智能（引导）”校准。
PNA帮助文件：“注意：要使用多个ECal模块进行校准，请选择SmartCal，然后选择ECal模块作为Cal Kits”。



     以下为原文

  For adapter characterization, it is important to note the following:

The device to be characterized (probe, adapter...) MUST be reciprocal (S21 = S12).

Two 1-port cals must be performed and saved to Cal Sets BEFORE using the Characterize Adaptor application. 

The frequencies and number of points of the two Cal Sets MUST be identical AND frequency spacing must be small enough to allow phase to unwrap properly.

**CRITICAL: The calculations that are performed to create the S2P file require that Calset 1 ALWAYS be from the side closest to the PNA and Calset 2 ALWAYS be from the other side of the device. If your application that uses the resulting S2P file requires that the ports be reversed, check Reverse Port Order. Or learn how to reverse the port order on an existing S2P file.**

By any chance you might have reverse the selection of Calset 1 and Calset 2.  
The math is quite straight forward.  If the error terms of Calset1 is from the side of the PNA and is converted to a T-matrix, [N], T-matrix of Caliset 2 is [NA] = [N]*[A].  [A] is the adapter's T-matrix.  Then [A] =inv[N]*[NA] .  The reflection tracking term is equivalent to  S21^2.  See Dr. Joel's book on error terms and T-matrix.
If the matrices are reversed, your result will be incorrect.

See Agilent App Note 1364-1, "De-embedding and Embedding S-parameter Networks from a Vector Network Analyzer"
http://cp.literature.agilent.com/litweb/pdf/5980-2784EN.pdf

The PNA does allow you to use multiple ECals to perform the unknown thru calibration.  You must select "Smart (Guided)" cal.
PNA help file:  "Note: To calibrate with more than one ECal module, select SmartCal, then choose the ECal modules as your Cal Kits".

天哪，谢谢你！
在校准下拉中，智能校准被标记为“smartcal：使用机械标准”，因此我没有机械标准，我从不费心看它> _Dr。
顺便说一句，乔尔你的书非常好。
我很高兴看到它。
谢谢！



     以下为原文

  Oh my god thank you! In the calibration drop down the smart cal is labeled "smartcal: use mechanical standards" so since I don't have mechanical standards I never bothered looking at it >_<
Dr. Joel your book is very good by the way. I'm enjoying reading it. Thanks!