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您好，我的问题如下。
Swept IMD for converter测量类允许您扫描频率范围内的2个输入音调并测量相应的感兴趣的互调。 是否有办法将其配置为更通用，只需在指定的RF频率范围内使用1个输入音调扫描并能够指定和测量输出端的特定杂散信息？ 例如，对于我的下变频器，如果我的LO = 10GHz且我的RF输入范围是25到30GHz。 我想在RF输入范围（即201 pts）上扫描我的奇异RF音调，并能够指定在输出端监视哪些感兴趣的杂散。 如果我想看看2IF支线，那么整体输出将是30到40GHz。 然后，如果我想查看RF-2LO支线，那么输出将调整为5到10GHz。 rokEdited by：rok on 2013年1月18日下午12:23 以上来自于谷歌翻译 以下为原文 Hello, My question is the following. The Swept IMD for converters measurement class allows you to sweep the 2 input tones across a frequency range and measure the corresponding intermodulation of interest. Is there a way to configure it to be more generic than that by only having to use 1 input tone across a specified RF frequency range to sweep and being able to specify and measure a particular spurious of interest on the output side? For example, for my downconverter, if my LO=10GHz and my RF input range is 25 to 30GHz. I want to sweep my singular RF tone across the RF input range (i.e. 201 pts) and be able to specify what spur of interest to monitor on the output side. If I want to look at the 2IF spur, then the overall output would be from 30 to 40GHz. Then if I want to look at the RF-2LO spur, then the output would adjust to be 5 to 10GHz. rok Edited by: rok on Jan 18, 2013 12:23 PM 
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您可以使用标准通道和FOM执行此操作。
我建议您首先设置一个标准通道，覆盖测量所需的所有源和接收器频率（如果RF和IF频率之间存在较大的频率间隔，请使用段）。 在打开FOM并配置特定的源和接收器范围之前，请对用于测量的两个端口执行引导功率校准。 完成此校准后，将校准所有源和接收器的电源。 此时，您可以使用FOM将源和接收器扫描配置到您想要的任何范围并测量任何杂散（只要它的频率落在您校准的范围内）。 此时，您还可以复制此主通道，以便在不必重复校准的情况下对不同的杂散进行测量。 以上来自于谷歌翻译 以下为原文 You can do that with the standard channel and FOM. I would recommend that you first setup a standard channel that covers all the source and receiver frequencies you need for your measurement (use segments if there is a big frequency gap between the RF and IF frequencies). before turning on FOM and configuring the specific source and receiver ranges, perform a guided power calibration for the two ports you are using for your measurement. once this calibration is done, all your sources and receivers will be calibrated for power. at this point you can use FOM to configure the source and receiver sweeps to whatever range you want and measure any spur (as long as it's frequency falls in the range you calibrated). you can also at this point make copies of this master channel to make measurements of different spurs without having to repeat the calibration. |
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嗨Joel博士，我尝试了你描述的smc方法，它似乎工作！
我附上了pdf图。 一种是在3个输入rf输入激励点使用imdx通道进行测量，而另一种是整个波段的smc方法。 结果似乎在1 dB之内。 我的后续问题是是否有一种方法可以翻转频率轴，使得较低的频率从左侧开始，而不是如图中所示的右侧。 （因为我正在研究的是-RF + 5LO，它可以翻转周围的一切）作为旁注，我认为安捷伦可以推广这一功能，类似于他们宣传扫描imd / x测量的方式。 开发团队可以创建另一种类型的测量类（即扫描转换器杂散），您可以在其中链接到预先存在的参考smc通道以继承大多数设置（即RF功率和频率范围以及LO设置）。 这样，您可以创建另一种提供dBc读数的跟踪类型，而无需使用公式编辑器，也可以根据上述问题调整频率轴。 此外，通过链接到多个杂散的参考smc通道，您可以通过更改参考smc通道更轻松地调整RF功率级别，而不必像使用IM Spectrum转换器那样更改每个杂散通道 测量通道。 韩国 01_18_2013（刺激样本）.pdf25.3 KB 以上来自于谷歌翻译 以下为原文 Hi Dr Joel, I tried the smc method you described and it seems to work! I attached the pdf plots. One is taking the measurement using an imdx channel at 3 input rf input stimulus points, while the other is the smc method for the entire band. The results seem to be within 1 dB of each other. My follow-up question is whether there is a way to flip the frequency axis such that the lower frequency starts on the left hand side, instead of the right hand side as shown in the plots. (because the spur I'm looking at is -RF + 5LO, which flips everything around) As a side note, I think Agilent can market this feature similar to how they are touting the swept imd/x measurement. The development team can create another type of measurement class (i.e. swept converter spurious), where you can link to a pre-existing reference smc channel to inherit most of the settings (i.e. RF power and frequency range and LO settings). That way, you can create another trace type that offers the dBc reading without having to hassle with using the equation editor and also can adjust the frequency axis based on the problem described above. Also, by linking to a reference smc channel for multiple spurs, you can adjust the RF power level easier by just changing the reference smc channel, rather than having to change each and every spurious channel, as is the case when using the IM Spectrum converters measurement channels. rok 附件
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