PNA-X噪声系数幅度偏移

您可以将此称为错误，或者您可以将此称为定义问题。
我认为这是一个我们没有想过的案例。
您输入的对数幅度偏移与您看到的噪声系数值变化之间的差异是预期的。
根据乔尔的观点，最终可能提供真正的解释，不同之处在于我们处理对数幅度与噪声系数的数学方法。
现在，假设您将获得偏移值的一半。
希望有更好的解释。



     以下为原文

  You could call this a bug, or you could call this a definition issue.  I think this is a case we had not really thought about.
The difference between the log magnitude offset that you are entering and the noise figure value change you are seeing is expected.  According to Joel, who may eventually provide the real explanation, the difference is in the way we deal with the math for log magnitude versus noise figure.   For now, figure you will get half the value of the offset.  

Hopefully, a better explanation is coming.

由于我不愿意进入的原因，安捷伦噪声研发团队（前我）认为将噪声功率基本单位设为温度开尔文是好的。
这就是“真正的噪音家伙”所想的。
这与噪声功率（以瓦特为单位）有关。
因此格式器被教导了噪声参数。
但是如果你在非噪声参数（例如S11或甚至a1）中启动等式，则单位是不同的。
公式编辑器查看指示格式化程序的基础参数。
因此，如果你从S11开始，格式化器的东西“dB是20 log”但是如果你从nf或噪声功率开始，它认为“db是10 log”并且mag偏移以这种方式受到影响。
在IMS之后，我们将理清这种行为是否完全是预期的（也是看到基础参数的mag偏移，我猜它必须）。



     以下为原文

  For reasons that I won't get into, Agilent Noise R&D team (ex me) thought it would be good to have noise power fundamental units be Temperature in Kelvin.  This is what "real noise guys" think about.

This is related to the noise power (in units of watts). Thus the formatter was taught about noise parameters. 

But if you start an equaiton in a non-noise parameters (such as S11 or even a1) the units are different. The equation editor looks at the underlying parameter to instruct the formatter.

Thus, if you start in S11, the formatter things "dB is 20 log" but if you start with nf or noise power, it thinks "db is 10 log"  and mag offset is affected in that way.  

After IMS we'll sort out if this behavior is entirely expected or not (is the mag offset looking at the underlying parameter too, I guess it must).