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您好，我想用一个网络分析仪N5247A双端口同时测量多个输入。
测量必须独立完成。 我看到这个分析仪有32个通道，是否可以通过多端口扩展来采样你可以拥有的所有端口？ 先谢谢你 以上来自于谷歌翻译 以下为原文 Hello, I would like to use one network analyzer N5247A two-ports to measure multiple input at the same time. The measurements must be done indepedently. I see this analyzer has 32 channel, is it possible with a multiport expansion to sample all the ports you could have? Thank you in advance 
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PNA中的多个接收器可以同时采样，只要它们在一个通道中并具有相同的激励条件（即分配相同的源端口）。
例如，如果我在通道中设置“A，1”和“B，1”测量，则同时测量两个接收器。 您必须向我们提供有关您的具体测量的更多详细信息，以便我们能够为您提供更详细的答案。 以上来自于谷歌翻译 以下为原文 multiple receivers in a PNA can be sampled simultaneously provided they are in one channel and have the same stimulus conditions (i.e assigned the same source port). For example if I setup an "A,1" and a "B,1" measurements in a channel, both receivers are measured at the same time. You'll have to give us a few more details about your specific measurement for us to be able to give you a more detailed answer. |
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Topcbpcba 发表于 2019-7-9 17:41 感谢daras，该场景是一个发射天线照射物体的源，以及连接到不同端口的4或10个接收天线，同时和独立地从被照射物体采集雷达图像。 我知道这个PNA-X可以升级到多个端口（测量通道为32）。 一般的想法是稍后处理来自每个端口的信号，相位和幅度，关联多个输入。 先谢谢你。 以上来自于谷歌翻译 以下为原文 Thanks daras, The scenario is one source with a transmitting antenna illuminating an object, and 4 or 10 receiving antennas connected to different ports, sampling simultaneously and independently the radar images from the illuminated object. I know this PNA-X can be upgraded to number of ports (the measurement channels are 32). The general idea is to process the signal from each port later, in phase and magnitude, correlating the multiple inputs. Thank you in advance. |
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如果您有外部回路（直接接收器访问），使用2端口盒，您应该能够设置“R1,1”，“A，1”，“B，1”和“R2,1”
“一个通道和所有4个接收器的测量将同时测量。 我假设这将是CW频率测量，在这种情况下，您还可以使用快速CW模式和FIFO（请参阅帮助“FIFO（选项118）和其他天线功能”中的此主题）来捕获实时 来自天线的数据流。 以上来自于谷歌翻译 以下为原文 If you have the external loops (direct receiver access), with your 2-port box, you should be able to setup an "R1,1", "A,1", "B,1", and an "R2,1" measurement in one channel and all 4 receivers will measure simultaneously. I am assuming this will be a CW frequency measurement, in which case, you can also use the fast CW mode and FIFO (see this topic in the help "FIFO (Opt 118) and other Antenna Features") to capture a real-time stream of data from your antennas. |
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Topcbpcba 发表于 2019-7-9 18:13 请你给我一些你认为更适合4 rx样本的选项。 蚂蚁。 在70GHz？ 我不确定所有必要的选择。 提前致谢 以上来自于谷歌翻译 以下为原文 Please can you give me the options you think they are more suitable to sample the 4 rx. ant. at 70GHz? I am not sure about all the necessary options. Thanks in advance |
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那么，我可以得到的每个接收器的最大采样率是多少？
和4或6同时？ Fast CW和没有它之间有什么区别？ 以上来自于谷歌翻译 以下为原文 So, what is the maximum sampling rate per receiver I can get? and with 4 or 6 simultaneously? What is the difference between Fast CW and not to have that? |
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好的，让我尽力澄清这一点。 这里要实现的第一件事是，使用2端口PNA，您可以在CW扫描配置中的任何给定时间最多采样4个接收器。 所以除非一些测量值是这4个接收器的比率，否则不可能同时进行6次测量。 您可以同时进行的2端口PNA中的4个接收器测量是A，B，R1和R2，但是都需要具有相同的源端口。 例如，您可以在通道“A，1”，“B，1”，“R1,1”和“R2,1”中进行以下4次测量。 此外，您还可以进行其他比率测量，例如“A / B，1”或“B / R2,1”。 现在数据采集率; 这完全取决于所选通道的IFBW和您盒子中的特定硬件。 在我的N5242A 4端口PNA-X上，对于600KHz IFBW，数据采集速率约为每点2.37 usec。 如果我将IFBW降低到200 KHz，那么这个数字加倍到每点大约4.73 usec。 在快速CW模式下，此数据采集速率不会改变。 您使用快速CW模式获得的是优化的数据处理。 FastCW仅适用于选项118，如果您处于FIFO扫描模式，在这种情况下，所有显示更新都将暂停，并且只能进行原始测量 - 换句话说，在此模式下，不能应用校准或其他校正。 当需要在很长一段时间内收集大量数据并为每个数据点定义明确的触发时间时，它非常有用。 但是，考虑到PNA在通道中支持多达32001个点，您仍然可以在不需要FIFO或FastCW的情况下获取大量数据。 在上面的200 KHz IFBW示例中，如果设置一个32001点的通道，则可以通过一次扫描获取最多约151.5毫秒的数据。 如果您需要长时间获取数据，可以减少IFBW或其他频道，也可以多次重新扫描同一频道。 这里的区别在于，当您从一个通道切换到下一个通道或重新扫描同一通道时没有FIFO，在转换期间的开销时间存在一些不确定性，因为控件被传递回Windows操作系统，这不是 一个实时操作系统。 希望这已经回答了你的问题。 以上来自于谷歌翻译 以下为原文 Ok- let me clarify this as best I can. the first thing to realize here is that with your 2-port PNA, you can sample 4 receivers maximum at any given time in a CW sweep configuration. so there is no possibility to make 6 simultaneous measurements unless some of the measurements are ratios of these 4 receivers. the 4 receiver measurements in a 2-port PNA that you can make simultaneously are A, B, R1, and R2, but need to all have the same source port. so for example you can have the following 4 measurements in your channel "A,1", "B,1", "R1,1" and "R2,1". additionally you can also have other ratio measurements such as "A/B,1" or "B/R2,1". now as for the data acquisition rate; that is entirely dependent on the selected IFBW for the channel and the specific hardware you have in your box. on my N5242A 4-port PNA-X, for a 600KHz IFBW, the data acquisition rate is approximately 2.37 usec per point. that number double to approximately 4.73 usec per point if I decrease the IFBW to 200 KHz. This data acquisition rate is not altered in the Fast CW mode. what you get with the Fast CW mode is optimized data processing. FastCW is only available with option 118 and if your are in a FIFO sweep mode in which case all display updates are suspended and only raw measurements are possible - in other words in this mode no calibration or additional correction can be applied. it is very useful when large amounts of data need to be collected over a long period of time with a well defined triggering time for each data point. however, given that the PNA supports up to 32001 points in a channel, you can still acquire a lot of data without the need for FIFO or FastCW. in the above example for the 200 KHz IFBW, you can acquire up to about 151.5 msec of data with one sweep if you setup a channel with 32001 points in it. if you need to acquire data for longer periods of time, you can either reduce the IFBW or additional channels or re-sweep the same channel multiple times. the difference here is that without FIFO when you switch from one channel to the next or re-sweep the same channel, there is some uncertainty in the overhead time during that transition as the control is passed back to the windows operating system, which is not a real-time OS. Hope this has answered your questions. |
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