使用N5242A来表征变频器有办法添加另一个调谐频率不用重新校准吗

因为除了转换参数（S11，SC21，SC12，S22）之外，您的测量还包括压缩，IMD和噪声系数，因此没有单个校准集可用于所有这些测量。
但是，如果您可以设置最终需要的所有不同测量通道，则可以通过一个校准过程来校准所有测量通道。
这被称为“Cal All”（你可以找到更多关于它_ *这里* _）。
Cal All支持所有可用的不同测量类别（VMC除外），它通过将不同测量专用校准的所有常用步骤（和频率）合并到一个优化的校准程序中来工作。
因此，使用Cal All，您将能够校准已经设置的每个测量，并且应该花费更少的时间，因为每个通道的所有常用步骤都合并到一个校准例程中。
您还可以使用Cal All来校准您希望最终制作每种测量类型的1个宽带通道的设置，然后您可以在执行Cal All后创建每种类型的其他通道并使用相同的校准集来校正新的
您添加的频道。
所以做你要求的是可能的，但有些事情你需要考虑（如正确的频率密度，以尽量减少插值误差，并确保每个宽带通道的衰减器设置可用于所有特定的测量
与您将来需要的类型相同）。
我可以提供更多有关如何操作的详细信息，但如果您可以预先设置所需的所有测量通道，使用Cal All来校正所有内容非常简单，并且不会出现插值错误。



     以下为原文

  because your measurements include Compression, IMD and Noise Figure in addition to the conversion parameters (S11, SC21, SC12, S22), there is no single calset that you can use for all these measurements.  However, if you can setup all the different measurement channels that you ultimately require, then there is one calibration process that you can go through to calibrate everything.  this is called "Cal All" (you can find more about it _*Here*_).  Cal All supports all the different measurement classes that are available (with the exception of VMC) and it works by consolidating all the common steps (and frequencies) of the different measurement-specific calibrations into a single optimized calibration routine.  

So with Cal All you will be able to calibrate every measurement that you have already setup and it should take a lot less time since all the common steps for each channel is consolidated into a single calibration routine.  

you can also use Cal All to calibrate a setup where you have 1 broadband channel of each type of measurement you want to eventually make and then you can create additional channels of each type after performing the Cal All and use the same calsets to correct the new channels you have added.  so doing what you asked for is possible, but there are things that you need to consider (like the right frequency density to minimize interpolation errors and making sure that the attenuator settings for each of the broadband channels can be used for all the specific measurements of the same type that you will need in the future).  I can provide more detail of how to do that, but if you can setup all the measurement channels that you need up front, using Cal All to correct everything is very easy and there will be no interpolation errors.

是的，Cal All是我一直在使用的。
我为所有测量设置通道并调整我需要的频率，然后执行Cal All。
Cal All可能需要一个多小时才能完成，并且通常有足够的测量通道（> 10个NFx通道，加上其他测量）Cal All在我花费所有时间完成整个过程后崩溃了！
我很想知道如何设置一个可用于多种设置的宽带频道，但在宽带方面有什么意义呢？
我基本上需要扫描RF AND LO。
我目前的做法是在每个测量通道中设置离散LO频率和扫描RF。
我不知道如何能同时扫描RF和LO。
谢谢！
艾伦



     以下为原文

  Yes, Cal All is what I have been using. I setup channels for all measurements and tune frequencies I need, and then perform Cal All. The Cal All can take over an hour to complete, and often, with enough measurement channels (> 10 NFx channels, plus other measurements) Cal All crashes after I have spent all the time going through the process!

I would love to hear about setting up a broadband channel that could be used for multiple setups, but in what sense is it broadband? I basically need to sweep RF AND LO. The way I am currently doing it is setting up discrete LO frequencies and sweeping RF in each measurement channel. I don't see how I could sweep BOTH RF and LO at once.

Thanks!
Alan

Alan，NF校准，特别是如果您使用功率传感器接收器表征方法，需要很长时间。
这是因为我们测量了通道中每个RF频率下噪声接收器的增益 - 带宽乘积。
我们正在努力优化该过程，但是，应用程序崩溃的事实很麻烦，我们希望进一步调查。
要做到这一点，我们需要：1-有关您的PNAX的信息 - 型号，选项和固件版本2-您的设置的PNA状态文件（.csa）在Cal All开始之前3-所有的描述
您在Cal All向导中调整的设置。
这包括对默认测量类特定设置的更改，校准通道设置的更改，功率传感器和校准套件选择，是否在校准中包括LO端口，以及在崩溃发生之前采取的步骤。
如果您不愿意在公共论坛上提供此信息，请将您的电子邮件发给我，我会将您的联系信息发送给您。
至于宽带方法，你基本上需要设置一个最终需要的测量类型的通道，使用如下所示的混音器设置：https：//dl.dropboxusercontent.com/u/87949221/Forum/ThreadID_39926
/BraodbandMixer.png！
例如，如果您使用上述混音器设置创建SMC，GCX，IMDX和NFX通道并使用Cal All校准该设置，然后将生成的校准集保存为“用户校准”，则可以创建任意数量的SMC，GCX
，IMDX和NFX信道，其中RF和IF频率落在上述混频器设置中所示的500 MHz至30 GHz范围内的任何位置。
这种方法的一个主要缺点是，您将无法使用此设置校准LO功率，并且您必须在LO端口上为需要LO校准的每个通道执行单独的源功率校准。
另一个警告是，使用这种宽带方法意味着将插入应用于每个单独信道的校正。
您必须在主宽带通道中放置足够的点以创建足够密集的频率间隔，以最大限度地减少插值误差（特别是如果您在更高频率下工作 - 通常是20 GHz以上的任何频率）。



     以下为原文

  Alan,

NF calibrations, especially if you are using the power sensor receiver characterization method, take a long time.  this is because we measure the Gain-Banwidth product of our noise receiver at every RF frequency in the channel(s).  We are working on optimizing that process, however, the fact that the application crashes on you is troublesome and we would like to investigate that further.  to do that we would need:

1- the information about your PNAX - model number, options, and FW revision
2- a PNA state file of your setup (.csa) prior to the start of Cal All
3- a description of all the settings that you adjust in the Cal All wizard.  this includes any changes to the default meas class specific settings, changes to calibration channel settings, power sensor and cal kit selections, whether or not you include LO ports in the calibration, and the steps you take before the crash occurs.

If you are not comfortable putting this information on the public forum, please PM me with your email and I will send you my contact information.

as for the broadband approach,  you basically need to setup one channel of each type of measurement that you eventually need with a mixer setup that looks something like this:

!https://dl.dropboxusercontent.com/u/87949221/Forum/ThreadID_39926/BraodbandMixer.png!

for example, if you create an SMC, GCX, IMDX, and NFX channel with the above mixer setup and calibrate that setup with Cal All and then save the resulting calsets as "User Calsets", then you can create any number of SMC, GCX, IMDX, and NFX channel where there RF and IF frequencies fall anywhere in the 500 MHz to 30 GHz range shown in the mixer setup above.  the one main drawback to this approach is that you will not be able to calibrate the LO power with this setup and you will have to perform a separate source power cal on the LO port for each channel that requires an LO cal.  The other caveat is that using this broadband approach means the correction applied to each individual channel will be interpolated.  you will have to put enough points in the master broadband channels to create a dense enough frequency spacing to minimize interpolation errors (especially if you are operating at higher frequencies - typically anything above 20 GHz).