如何为SMA设备最好地使用85052B 3.5 mm套件？

你好Dave，3.5mm校准套件中那些奇怪的发声电容条目是可配合连接器的并联电容模型，如SMA到3.5 mm和2.92 mm到3.5 mm。
8510具有连接器补偿功能，可将3.5mm校准测试端口转换为虚拟SMA测试端口。
参见Roger Pollard博士的论文“补偿技术改进了一系列机械兼容连接器的测量”，Microave Journal，1994年10月。只有8510具有这种连接器补偿功能。
PNA可以通过使用夹具去嵌入来执行类似的任务。
需要并联电容模型的S2P文件。
从论文中，应该能够计算错误适配器并将其保存为S2P文件。
肯



     以下为原文

  Hello Dave,

Those strange sounding capacitance entries in the 3.5mm cal kits are shunt capacitance models of matable connectors such as SMA to 3.5 mm and 2.92 mm to 3.5 mm.  The 8510 has a connector compensation function that converts a 3.5mm calibrated test port into a virtual SMA test port. See paper by Dr. Roger Pollard "Compensation Technique Improves Measurements For a Range of Mechanical Compatible Connectors",  Microave Journal Oct. 1994. Only the 8510 has this connector compensation function.  

The PNA can perform a similar task by using fixture de-embed.  An S2P file of the shunt capacitance model is required.  From the paper, one should be able to compute the error adapter and save it as an S2P file.

Ken

> {quote：title = drkirby写道：} {quote}>我的8720D的固件（版本7.74）使用了29.243 ps的偏移延迟，在该页面中它显示了29.2 ps的PNA，所以有一个>差别
43 fs，这是相当小的，虽然我很困惑为什么它存在。
无论如何，这是一个小问题。
我相信用于创建该表页面的电子表格会舍入该特定值;
在PNA对该套件的表示中，偏移延迟实际上精确到29.243 ps，就像在872x中一样。
最好的问候，布拉德



     以下为原文

  > {quote:title=drkirby wrote:}{quote}
> The firmware (version 7.74) for my 8720D use an offset delay of 29.243 ps, and in that page it shows 29.2 ps for the PNA, so there is a 
> difference of 43 fs, which is pretty small, although I'm puzzled why it exists. Anyway, that is a minor issue.

I believe the spreadsheet that was used to create that table page rounded that particular value; in the PNA's representation of that kit the offset delay is actually precisely 29.243 ps, just as in the 872x.

Best regards,
Brad

> {quote：title = bhokkan写道：} {quote} >> {quote：title = drkirby写道：} {quote} >>我8720D的固件（版本7.74）使用29.243 ps的偏移延迟，并在该页面中
对于PNA来说它显示29.2 ps，所以有43 fs的差异，这相当小，尽管我很困惑为什么它存在。
无论如何，这是一个小问题。
>>我相信用于创建该表页面的电子表格会舍入该特定值;
在PNA对该套件的表示中，偏移延迟实际上精确到29.243 ps，就像在872x中一样。
>>祝您好运，>布拉德谢谢布拉德。



     以下为原文

  > {quote:title=bhokkan wrote:}{quote}
> > {quote:title=drkirby wrote:}{quote}
> > The firmware (version 7.74) for my 8720D use an offset delay of 29.243 ps, and in that page it shows 29.2 ps for the PNA, so there is a 
> > difference of 43 fs, which is pretty small, although I'm puzzled why it exists. Anyway, that is a minor issue.
> 
> I believe the spreadsheet that was used to create that table page rounded that particular value; in the PNA's representation of that kit the offset delay is actually precisely 29.243 ps, just as in the 872x.
> 
> Best regards,
> Brad

Thank you Brad.

> {quote：title = kenwong写道：} {quote}> Hello Dave，>> 3.5mm校准套件中那些奇怪的发声电容条目是可配合连接器的并联电容模型，例如SMA到3.5 mm和2.92 mm到3.5 mm。
谢谢肯。
> 8510具有连接器补偿功能，可将3.5mm校准测试端口转换为虚拟SMA测试端口。
参见Roger Pollard博士的文章“补偿技术改进了一系列机械兼容连接器的测量”，Microwave Journal，1994年10月。我将看看那篇论文。
我以前见过你提到它，但我必须承认我没看过它。
我显然猜错了那些奇怪的价值！
戴夫



     以下为原文

  > {quote:title=kenwong wrote:}{quote}
> Hello Dave,
> 
> Those strange sounding capacitance entries in the 3.5mm cal kits are shunt capacitance models of matable connectors such as SMA to 3.5 mm and 2.92 mm to 3.5 mm. 

Thank you Ken. 

> The 8510 has a connector compensation function that converts a 3.5mm calibrated test port into a virtual SMA test port. See paper by Dr. Roger Pollard "Compensation Technique Improves Measurements For a Range of Mechanical Compatible Connectors",  Microwave Journal Oct. 1994. 

I'll take a look at that paper. I have seen you mention it before, but I must admit I did not look at it. I obviously guessed incorrectly what those odd values were! 

Dave