使用PNA-L网络分析仪是否具有内置噪声源

嗨，虽然我们确实可以使用我们的一些PNA网络分析仪进行噪声系数和IMD / IP3测量，但您拥有的模型（N5230C）并不是其中之一。
事实上，N5230C是一款已停产的型号，最新支持的固件是从2011年开始的。它还没有必要的硬件来进行良好的噪声系数和IMD测量。
想要进行这两项测量的客户通常使用我们的PNA-X型号之一（我们的PNA-X型号最高频率为8.5 GHz，最高频率为67 GHz，超出使用mmw外部混频器）。
具体的噪声系数测量有两种选择，使用专用低噪声接收器（选件029）和使用标准NA接收器（选件028）。
选件029仅适用于PNA-X型号。
029选项旨在进行非常精确的低噪声测量，您可以使用噪声源（未包含）或功率传感器（也未包括）进行校准。
选项028使用标准NA接收器进行噪声功率测量，但噪声系数高于专用低噪声接收器。
它被设计为一种低成本替代方案，用于在增益+噪声至少为30-35 dB的高增益和/或高噪声设备上进行噪声系数测量。
只要您有自己的外部低噪声放大器，可以使用可配置的测试环路连接到PNA接收器前面，可以使用选项028测量增益和噪声较小的器件。
选项028只能使用功率传感器进行校准（噪声源的ENR不足以克服接收机噪声系数）。
除了PNA-X之外，某些PNA型号也提供选项028，但不适用于任何PNA-Ls。
要进行IMD / IP3测量（选项087），您需要具有双源选项的PNA-X或PNA。
在PNA-X上，您还需要内置的组合网络进行IMD测量（选项223或423）。
我们还允许在支持具有外部组合网络的双源的PNA模型上进行IMD测量。
希望这能回答你的问题。
如果您需要有关配置和订购适合您的测量需求的PNA或PNA-X的帮助，请通过论坛的私人消息部分将您的联系信息发送给我，如果您愿意，我很乐意与您联系安捷伦销售代表
尚未接触过一个。



     以下为原文

  Hi,

while we can indeed make Noise Figure and IMD/IP3 measurements with some of our PNA network analyzers, the model that you have (an N5230C) is not one of those models.  In fact, the N5230C is a discontinued model and the latest supported firmware for it is from 2011.  It also does not have the hardware necessary to make good noise figure and IMD measurements.

Customers who want to make these two measurements typically use one of our PNA-X models (we have PNA-X models from 8.5 GHz max frequency all the way up to 67 GHz max frequency and beyond using mmw external mixers).  Noise figure measurements in specific come in two options, using a dedicated low noise receiver (option 029) and using the standard NA receiver (option 028).  Option 029 is only available on PNA-X models.  the 029 option is designed to make very accurate low noise measurements and you can either use a noise source (not included) or a power sensor (also not included) for calibration.  option 028 uses the standard NA receivers to make noise power measurements, but it has a higher noise figure than the dedicated low noise receiver.  it is designed as a lower cost alternative for making noise figure measurements on high gain and/or high noise devices where the gain+noise is at least 30-35 dB.  devices with less gain and noise can be measured with option 028 as long as you have your own external low noise amplifier that you can connect in front of the PNA receiver using the configurable testset loops.  Option 028 can only be calibrated with a power sensor (noise sources won't have high enough ENR to overcome the receiver noise figure).  in addition to PNA-X's, option 028 is also available on some PNA models, but not on any PNA-Ls.

to make IMD/IP3 measurements (option 087) you need a PNA-X or a PNA that has the dual source option.  on PNA-X's you'll also need the built-in combiner network for the IMD measurement (option 223 or 423).  We also allow IMD measurements on PNA models that support dual sources with an external combining network.

Hope this answers your questions.  If you need help with configuring and ordering a PNA or PNA-X suitable for your measurement needs, please send me your contact information via the forum's private message section and I'll be happy to put you in touch with an Agilent sales representative if you are not already in contact with one.