执行多个比例测量

是的，它可以做到。
您可以进行4端口引导功率校准，以响应所有接收器的校正。
校准后，您可以关闭内部源并在外部设备对话框中添加外部源（PNA-X将通过GPIB，LAN或USB控制外部源）。
在通道的FOM对话框中配置外部源的频率扫描，并在“功率和衰减器”对话框中配置功率级别。
还将外部源状态设置为ON。
在您的频道中创建“B / A，0”，“C / A，0”，“D / A，0”测量值，每个测量值将自动通过响应校正进行校正。



     以下为原文

  yes it can be done.  you can do a 4-port guided power calibration that will response corrections for all your receivers.  after the calibration you can turn off the internal sources and add your external source in the external device dialog (the PNA-X will control the external source through GPIB, LAN or USB).  configure the frequency sweep of the external source in the channel's FOM dialog and configure the power level in the Power and attenuators dialog.  also set the external source state to ON.  in your channel create the "B/A,0", "C/A,0", "D/A,0" measurements and each measurement will automatically be corrected with the response correction.

感谢您的快速回复。
另一个问题。
以这种方式进行测量是否会影响测量的准确性。



     以下为原文

  Thanks for the quick reply. 

One other question. Does doing the measurement this way effect the accuracy of the measurements.

> {quote：title = cgantz2000写道：} {quote}>感谢您的快速回复。
>>另一个问题。
以这种方式进行测量是否会影响测量的准确性。
判断此方法准确性的唯一方法是将其与另一种进行相同测量的方法进行比较。
因此，如果您能描述您的替代方法，我们可以告诉您哪些方法的不确定性较小。
但基本上你得到的是响应校正测量。
当您不使用内部信号源时，您将无法在接收机测量中获得匹配校正，因此DUT的不同端口的不匹配效应将与您正在进行的比率测量有关。
如果所有4个端口具有相对相同的不匹配，则采用这些比率将缓解该问题。



     以下为原文

  > {quote:title=cgantz2000 wrote:}{quote}
> Thanks for the quick reply. 
> 
> One other question. Does doing the measurement this way effect the accuracy of the measurements.

the only way to judge the accuracy of this method is to compare it to another way of making the same measurement.  So if you can describe your alternative approach, we can tell you which has less uncertainty.  but basically what you are getting are Response corrected measurements.  When you don't use the internal source, you will not get match correction on the receiver measurements, so the mismatch effects of the different ports of your DUT will be in the ratio measurements that you are making.  if all the 4 ports have relatively the same mismatch, then taking the ratios will mitigate the problem.

再次感谢你的回复。
我在校准时遇到问题。
我使用ecal做标准引导的cal。
如果我有一个标准测量，如S11，显示屏会显示该迹线的校准值。
但是如果我有一个比例跟踪，比如A / R1，根据我的理解与S11相同，显示屏显示No Cal。
我该怎么做以获得接收机测量的校准？



     以下为原文

  Thanks again for the reply.

I am having problems with the calibration. I do the standard guided cal using an ecal. If I have a standard measurement, like S11, the display shows the cal is on for that trace. But if I have a ratioed trace, like A/R1, which from my understanding is the same as S11, the display shows No Cal.

What do I do to get the cal on for the the receiver measurements?

你必须进行“引导功率校准”。
除了ECal（或机械套件）之外，在该校准中，还会提示您将功率传感器连接到其中一个端口。
如果没有功率传感器步骤，则无法进行任何校正的接收机测量。
您可以通过PNA在线帮助找到有关导向功率校准的更多信息_ * HERE * _



     以下为原文

  You have to do the "Guided Power Calibration".  In that calibration in addition to an ECal (or a mechanical kit), you will also be prompted to connect a power sensor to one of the ports.  Without the power sensor step you cannot have any corrected receiver measurements.  you can find out more about guide power calibration with the PNA online help _*HERE*_

谢谢。
这样做了。
我从来没有注意到引导的“Power”Cal，所以当我看到你的第一个回复时，我注意到的只是“引导Cal”。
你每天学习新的东西。
如果我可以建议，您可能希望使用Guided Power Cal添加比例和非比例测量的帮助。



     以下为原文

  Thanks. That did it. I've never noticed the Guided "Power" Cal, so when I saw your first reply, all I noticed was "Guided Cal". You learn something new every day.

If I could suggest, you might want to add using the Guided Power Cal to the help on ratioed and unratioed measurements.

> {quote：title = cgantz2000写道：} {quote}>如果我可以建议，您可能希望使用Guided Power Cal添加比例和非比例测量的帮助。
我会把它传递给我们的学习产品工程师。
谢谢。



     以下为原文

  > {quote:title=cgantz2000 wrote:}{quote}
> If I could suggest, you might want to add using the Guided Power Cal to the help on ratioed and unratioed measurements.

I'll pass that along to our Learning Products engineer.

thank you.

事实上，你是对的，我们也应该能够在没有引导Cal的情况下获得比率。
我想约翰会加上这个，但还没有解决它。
但是，现在你也获得了很好的绝对力量，所以就是这样！



     以下为原文

  In fact, you are right that we should also be able to have ratios without the guided Cal.  I think Johan was going to add this but hasn't yet got around to it.  But, now you get good absolute power too, so there's that!

谢谢。
事实上，我已经充分利用了绝对功率测量。顺便说一句，我实际上使用的是N5242A或者更好，而不是像我原先说的那样5224。
但是，只要我问，是否有可能在不同的通道上进行SMC测量，而不会让源从端口1流出。我们希望SC21幅度和相位除了相对幅度之外
和阶段。
我可以看到，至少在理论上，删除了端口1的Source Out / cplr，但这是允许的。
我们只对SC21感兴趣。
换句话说，我们将在通道1上进行B / A，C / A和D / A比率测量，来自端口1源连接器的源和来自通道2的SC21，再次来自源
端口1源连接器。
如果可以的话，你会如何校准这个。



     以下为原文

  Thanks. In fact, I already took advantage of the absolute power measurement.By the way, I'm actually using an N5242A or better, not a 5224 like I originally said.

But, as long as I'm asking, Is it possible, on a different channel, to do an SMC measurement, without having the source coming out of port 1. We would like to have SC21 magnitude and phase in addition to the relative amplitude and phases. I can see, at least in theory, removing the Source Out/cplr thru for port 1, but is this allowed. We would only be interested in SC21 for this. 

So, in other words, we would be doing the B/A, C/A, and D/A ratioed measurement on channel 1, with the source from the port 1 Source connector, and SC21 on channel 2, again with the source from the port 1 Source connector. If this is possible, how would you calibrate this.

我最近看到过类似的情况。
你能给我一个方块图草图（joel_dunsmore@keysight.com），所以我可以很确定你想做什么？
如果它是我怀疑的，那么是的，它可以完成，但不是简单的校准，因为我们不支持在任何校准中从Source_out连接中出来的源。
最好的方法可能是使用DIQ应用程序，但是你无法在没有额外工作的情况下对port1端口进行匹配修正，因为你已经从port1输出连接器窃取了源代码。
并且您需要对源输出信号进行额外测量，然后破解校准集以适应Source_out和Port1输出之间的差异。



     以下为原文

  I've seen a similar situation recently.  Can you send me a block diagram sketch (joel_dunsmore@keysight.com) so I can be quite sure of what you want to do?

If it is as I suspect, then yes it can be done, but not with a simple calibration, as we don't support the source coming out of that Source_out connect in any of the calibrations. 

The best way is probably to use the DIQ application but you can't do match corrections on the port1 port without extra work as you've already stolen the source from the port1 out connector.  And you will need to make an additional measurement of the source out signal and then hack the calset to accomidate the difference between Source_out and Port1 out.