如何正确验证滑动载荷性能？

我是论坛的新手，这里有很多好消息。
我在计量实验室工作，我在滑动负载的验证/校准方面遇到了同样的问题。
我对计量学比较陌生，目前我正在努力掌握校准VNA机械校准套件的技术。
我想提出一种建立一些通过/失败标准的方法，该标准比85052B O＆amp; M手册中建议的过程要简单一些，该手册需要校准系统，执行系统验证，然后获得打印输出。
校准完成后的残留误差;
或者，使用航空公司，精确终止和时域门控直接测量方向性。
我遇到了各种滑动负载，主要是HP 911C / D / E和Maury 8035，以及来自同一制造商的N-Type，APC-7和2.4mm的滑动负载。
我将专注于3.5毫米滑动负载，因为我怀疑任何解决方案都显示出来（假设有一个解决方案）将适用于其他连接器类型的滑动负载。
我还注意到，安捷伦（HP）在早期的85052A校准套件中使用了Maury 8035系列滑动负载。
我见过一个带有911C负载的85052A套件。
大多数85052B套件似乎都使用911D / E滑动负载，尽管我也看到了一些Maury 8035系列滑动负载。
Maury在其套件中使用8037系列滑动负载。
我已经阅读了安捷伦AN 117-1（对于像我这样的人来说很棒的入门读物）以及_Sliding Load_，_Sliding load check_，_Sliding load calibration_和_Sliding Load Verification_ threads。
线程指出，每个制造商，尤其是Maury，滑动负载的规格是不同的。
安捷伦：911C（反射系数）可移动负载元件：48dB，与下面的85052B套件规格相冲突）85052A套件（1250-1891，回波损耗）滑动负载：> 42dB（仅限航空公司部分）（类似于Maury规范格式）85052B
套件（911D / E，回波损耗）滑动负载：> 44dB（校准后的剩余回波损耗）Maury 8035系列：终端元件（VSWR）：1.090最大值，2 - 4 GHz（44dB Maury 8037系列：终端元件（VSWR）：
1.090,2至4 GHz 1.05,4至34 GHz航空公司准确度（回波损耗）：50 dB最小回波损耗（空气线路阻抗的等效回波损耗）滑动负载规范的格式不仅在制造商之间有所不同，而且在
制造商模型。来自'daveb'和'Dr_joel'的三个回应似乎提供了一个解决方案：davebRe：Sliding Load发表日期：2007年8月29日上午9:36“...在测量滑动载荷后进行校准后，您将看到反射系数
滑动负载元件。如前所述
因此，滑动负载元件大小的变化提供了校准质量的指示。“Dr_joelSliding Load发布日期：2007年8月30日1:22 PM取线性幅度差异（最差情况为0.002），然后
取20 * log10（.002）= - 54 dB。
因此，这表示滑动负载误差和方向性的组合最坏情况-54 dB（我们不能将两者分开）。
好cal。
Dr_joelSliding负载校准发布日期：2009年1月23日上午9:22“要真正测量滑动负载，您需要测量每个滑点的重新感知，然后计算差异（最差情况）以得出最小 - 最大vswr
的负荷。
不同之处在于负载的质量，因为它应该在每个滑点提供完全相同的伽玛。
它不会的唯一原因是传输线（航空公司）不是50欧姆。
回波损耗的实际值并没有显着影响滑动负载的误差。“我使用TRL套件（85052C）校准了我们的8510C并获取了911C滑动负载，两组911D / E滑动负载的数据
，以及四组8035系列滑动负载。
如果我将'Dr_joel的表达式：20 * log10（反射系数）应用于每个测量频率的六个滑动位置的反射系数max-min差异，那么我将比较结果以确定正确的性能？
似乎我可以使用85052B套件44dB规格作为911D / E滑动负载的最低性能（在3GHz到26.5GHz之间只有一组911D / E超过44dB），但我不确定如何使用另一组
设备。
我是在正确的轨道上吗？
如果使用85052B套件中的44dB规格不是评估911D / E滑动负载性能的正确数量，我应该使用什么？
更一般地说，在评估我列出的任何滑动载荷时，什么会构成“良好校准”阈值？



     以下为原文

  I’m new to the forum, lots of good info here.

I work in a metrology lab and I am having the same issues regarding verification/calibration of sliding loads. I’m relatively new to metrology and currently I am trying to master the art of calibrating VNA mechanical calibration kits. I’d like to come up with a method of establishing some Pass/Fail criteria that would be somewhat simpler than the process suggested in the 85052B O&M manual requiring calibrating a system, performing a system verification, and then getting a printout of the residual errors after a calibration has been performed; or, using an airline, precision termination, and time domain gating to measure directivity directly.

I encounter a variety of sliding loads, predominantly HP 911C/D/E and Maury 8035’s in addition to sliding loads from the same manufacturers for N-Type, APC-7, and 2.4mm. I’ll focus on 3.5mm sliding loads as I suspect that whatever solution reveals itself (assuming there is a solution) will be applicable to the other connector style sliding loads. I’ve also noticed that Agilent (HP) used Maury 8035 series sliding loads in the early 85052A calibration kits. I’ve seen one 85052A kit with 911C loads. Most 85052B kits appear to use 911D/E sliding loads, although I have seen a few with Maury 8035 series sliding loads as well. Maury uses 8037 series sliding loads in their kits.

I’ve read Agilent AN 117-1 (great primer for folks like me who are just getting into this) as well as the _Sliding Load_, _Sliding load check_, _Sliding load calibration_, and _Sliding Load Verification_ threads here. The threads point out that the specs for sliding loads are different for each manufacturer, in particular Maury.

Agilent:
911C     (Reflection Coefficient)
Moveable Load Element: 48dB, which conflicts with the 85052B kit spec below)
85052A Kit (1250-1891, Return Loss)
Sliding Load: >42dB (Airline portion only) (Similar to Maury specification format)
85052B Kit (911D/E, Return Loss)
Sliding Load: >44dB (residual return loss after calibration)

Maury 8035 series:
Terminating Element (VSWR): 1.090 maximum, 2 — 4 GHz (44dB

Maury 8037 series:
Terminating Element (VSWR): 1.090, 2 to 4 GHz
                                                  1.05, 4 to 34 GHz
Airline Accuracy (Return Loss): 50 dB min return loss (Equivalent return loss of air line impedance)

The formats for the sliding load specifications are different not only between manufacturers, but also within manufacturer models.

Three responses from ‘daveb’ and ‘Dr_joel’ appear to offer a solution:

daveb     Re: Sliding Load Posted: Aug 29, 2007 9:36 AM
“…After calibration when measuring the sliding load, you will see the reflection coefficient of the sliding load element. As described previously, the variation in the magnitude of the sliding load element provides an indication of the quality of the calibration.”

Dr_joel     Sliding Load Posted: Aug 30, 2007 1:22 PM
Take the difference in linear magnitude (worst case is 0.002), and then take 20*log10(.002)=-54 dB. So, this says that a combination of your sliding load error and your directivity is worst case -54 dB (we can't separate the two). Good cal.

Dr_joel     Sliding load calibration Posted: Jan 23, 2009 9:22 AM
“To really measure a sliding load, you would need to meaure the relfection at each slide point, then compute the differences (worst case) to come up with the min-max vswr of the load. The difference is the quality of the load, since it should provide exactly the same gamma at each slide point. The only reason it won't is if the transmission line (airline) is not 50 ohms. The actual value of the return loss does not substantially contribute to the error of a sliding load.”

I calibrated our 8510C using a TRL kit (85052C) and took data for a 911C set of sliding loads, two sets of 911D/E sliding loads, and four sets of 8035 series sliding loads. If I apply ‘Dr_joel’s expression: 20*log10(reflection coefficient) to the reflection coefficient max-min difference across the six slide positions for each measurement frequency, to what do I compare the result to establish proper performance? It appears that I can use the 85052B kit 44dB spec as the minimum performance for 911D/E sliding loads (Only one set of 911D/E’s exceed 44dB across 3GHz to 26.5GHz), but I’m not sure what to use for the other devices. Am I on the right track?  
If using the 44dB specification from the 85052B kit is not the correct quantity for evaluating the performance of the 911D/E sliding loads, what should I use? More generally, what would constitute a ‘good cal’ threshold when evaluating any of the sliding loads I listed?