可以使用3.5 mm连接器量规来检查2.92 mm连接器吗？

你好Dave，是的，你可以使用带有2.92mm连接器的85052B calkit的量具。
如果寻找Megaphase电缆制造商的规格，他们说2.92mm回归可以是0 / -0.003“。所以一切都很好。这是正常的，你可以从Agilent 3.5mm测试端口电缆连接器得到这样的结果。如果可能的话，
记得始终使用适当的测试端口适配器套件和电缆，而不是直接校准测试端口电缆.Testport适配器连接器的可重复性要好得多，并且它们比电缆的连接器更耐用.VNA电缆头部是最敏感的部件，它是
不能直接将校准标准和DUT连接到电缆上引起额外的机械应力。我们的实验室的测试端口电缆只有NMD（公）连接器.NMD（公）可以很好地安装Keysight测试端口适配器，因为它们配备了NMD
（女性）。这在测试端口电缆上提供了最好和最强大的连接。这些只是我关于VNA测量的实际生活记录.TuomasEdited：bar28于2016年3月4日上午10:45



     以下为原文

  Hello Dave,

Yes, you can use 85052B calkit's gages with 2.92mm connectors. If looking for example Megaphase cable manufacturers specs, they saying that 2.92mm regression can be 0/ -0.003". So all is fine. It's normal, that you can get such a results from Agilent 3.5mm test port cable connectors.

If possible, remember to use always proper test port adapter set's with cables and not do directly calibration end of the testport cable. Testport adapter connector repeatability is much better and they are manfucatured much tighter tolerances than cable's connectors. VNA cables head part is most sensitive part and it's not good to cause additional mechanical stress connecting calibration standards and DUT's directly on the cable. Our lab's has testport cables which have only NMD(male) connectors. NMD(male) you can fit nicely Keysight test port adapters,  because they are equipped with NMD(female). That gives best and robust connection on the test port cable. These were just my practical life notes about VNA measurements.  

Tuomas

Edited by: bar28 on Mar 4, 2016 10:45 AM

> {quote：title = bar28写道：} {quote}> Hello Dave，>>是的，你可以使用带有2.92mm连接器的85052B calkit的量具。
如果查看Megaphase电缆制造商的规格，他们说2.92mm回归可以是0 / -0.003“。所以一切都很好。通常情况下，您可以从Agilent 3.5mm测试端口电缆连接器获得这样的结果。>>如果
可能的话，记得始终使用适当的测试端口适配器套件和电缆，而不要直接校准测试端口电缆.Testport适配器连接器的可重复性要好得多，并且它们比电缆的连接器更耐用.VNA电缆头部是最敏感的部件
并且直接在电缆上引起校准标准和DUT的额外机械应力是不好的。我们的实验室的测试端口电缆只有NMD（公）连接器.NMD（公）可以很好地适应Keysight测试端口适配器，因为它们配备齐全
与NMD（女性）。这在测试端口电缆上提供了最好和最强大的连接。这些只是我关于VNA测量的实际生活记录。>> Tuomas Hello Tuomas，谢谢你
有关带有2.92连接器的3.5 mm规格的信息。
我有一些3.5毫米NMD适配器* 2 x NMD到母N * 1 x NMD到公3.5 mm * 1 x NMD到母3.5 mm * 1 x NMD到APC7我的销售代表买了两条二手电缆和2.92 mm连接器
每一端。
我当时只检查了一个，因为我并不热衷于将枪管插入我的VNA的NMD测试端口，而是将我的NMD用于3.5 mm的母头适配器。
但是我做了一些测试，看看当电缆弯曲，幅度变化等时相位变化多少。这些电缆每对约1300美元，比Keysight 85131F NMD到3.5毫米的5235美元低很多。
我认为1300美元适用于任何连接器组合（包括NMD），但我不确定。
至少在我目前使用的Agilent 85131F上，引脚深度约为0.0005“，所以比这些更便宜的电缆要少得多。我刚检查了Keysight 85131F的手册，看到经济衰退在-0.0001到-0.0001之间。
-0.0005“，所以它们比代表买给我的电缆好得多，而且比你说的Megaphase电缆要好很多。
我想你会得到你付出的代价！
戴夫



     以下为原文

  > {quote:title=bar28 wrote:}{quote}
> Hello Dave,
> 
> Yes, you can use 85052B calkit's gages with 2.92mm connectors. If looking for example Megaphase cable manufacturers specs, they saying that 2.92mm regression can be 0/ -0.003". So all is fine. It's normal, that you can get such a results from Agilent 3.5mm test port cable connectors.
> 
> If possible, remember to use always proper test port adapter set's with cables and not do directly calibration end of the testport cable. Testport adapter connector repeatability is much better and they are manfucatured much tighter tolerances than cable's connectors. VNA cables head part is most sensitive part and it's not good to cause additional mechanical stress connecting calibration standards and DUT's directly on the cable. Our lab's has testport cables which have only NMD(male) connectors. NMD(male) you can fit nicely Keysight test port adapters,  because they are equipped with NMD(female). That gives best and robust connection on the test port cable. These were just my practical life notes about VNA measurements.  
> 
> Tuomas

Hello Tuomas,

Thank you for the information about the 3.5 mm guages with 2.92 connectors.

I have a few 3.5 mm NMD adapters 

* 2 x NMD to female N
* 1 x NMD to male 3.5 mm
* 1 x NMD to female 3.5 mm
* 1 x NMD to APC7

I sales rep bought a couple of used cables with 2.92 mm connectors each end. I only checked one at the time, as I was not keen to put a barrel into the NMD test port of my VNA, but instead used my NMD to female 3.5 mm adapter. But I done a few tests to see how much the phase varied when the cables were bent, change in amplitude etc. 

These cables are about $1300 a pair, which is a lot less than the $5235 for the Keysight 85131F NMD to 3.5 mm. I believe that the $1300 is for any connector combination (including NMD), but I'm not sure. 

At least on the Agilent 85131F's I'm currently using, the pin depths are around 0.0005", so a lot less than these cheaper cables were. I just checked the manuals for the Keysight 85131F and see the recession is in the range -0.0001 to -0.0005", so they are a lot better controlled than the cables the rep bought to me, and also a lot better than the Megaphase cables you speak of. I guess you get what you pay for ! 

Dave

好吧，我有很多关于MegaPhase VNA电缆的经验。
它们不是那么昂贵，它直接反映了它们的质量。
电缆本身做得很好，但问题是连接器部分以及电缆如何连接到连接器。
我有几个Megaphase NMD2.4到7mm电缆和Agilent 85054B / D套件的7mm到Type-N测试端口适配器根本不能很好地与它们配合使用。
不知何故，7毫米电缆连接器没有很好地连接到testport 7毫米适配器和16-17GHz附近的巨大衰减尖峰。
我不得不把它们拿走。
是德科技或戈尔电缆，我从来没有遇到过这样的问题。
目前我在两个测试端口上使用我的40GHz VNA设置NMD2.4mm（母）到NMD2.4mm（公）电缆。
我现在没有看到使用2.4mm（母）端的tesport电缆的原因，因为我需要适配器套件 - 当我做2.4mm DUT校准时我使用的是Keysight 85130G套装，3.5mm工作85130F和7mm 85130E
- N型校准必须将电缆更换为NMD2.4（母）至7mm，并使用85054B / D calkit的7mm至N型适配器，不幸的是，Keysight目前没有适当的测试端口适配器，从2.4mm到2.92mm，但是
适配器可以从其他制造商处找到。
图奥马斯



     以下为原文

  Well, I have lot of experienced about MegaPhase VNA cables. They are not so expensive and it reflect directly to quality of them. Cable itself is quite nicely
done, but problem is the connector part and how cable is attached to connector. I had several Megaphase NMD2.4 to 7mm cables and Agilent 85054B/D kit's 7mm to Type-N testport
adapters not worked well with them at all. Somehow 7mm cable connector not done good connection to testport 7mm adapter and near 16-17GHz where huge attenuation spike. I had to put them away. Keysight or Gore cables I have never had such a problems at all.

Currently I'm using on my 40GHz VNA setup NMD2.4mm(female) to NMD2.4mm(male) cables on both test ports. I don't see now reasons to use 2.4mm(female) ended tesport cables, because I have needed adapter set's available

- When I'm doing 2.4mm DUT calibrations I'm using Keysight 85130G set, 3.5mm works 85130F and 7mm 85130E
-  Type-N calibrations have to change cables to NMD2.4(female) to 7mm and use 85054B/D calkit's 7mm to Type-N adapters  

Unfortunately Keysight not currently have available proper test port adapter set from 2.4mm to  2.92mm, but such an adapter can find from another manufacturers.

Tuomas