[问答]

41952B传输反射测试装置检查其操作是否正确

问答对人有帮助，内容完整，我也想知道答案 0 我有一个41952B 75欧姆T / R测试装置，并想验证它是否正常运行。（我正在使用4195A网络分析仪）操作说明有一个基本方法：第3节操作：3-4操作员检查然而，它为非专家留下了很多。（我擅长模拟音频电子设备和一点点无线电 - 但没有天线和RF。所以虽然对T / R只有非常基本的了解，但我基本上需要一步一步地对分析仪进行检查。，步骤如下：1。将设备连接到分析仪，测试端口未连接.2。将分析仪停止和启动频率分别设置为10和500 mHz 3.将分析仪输出电平设置为0 dBm 4. “网络分析仪的幅度比读数应该大约为0 dB。“ 5.将75欧姆（我有B单元）终端连接到测试端口.6。”网络分析仪的幅度比读数应小于-30 dB“可能更简单？但是我有一些问题： - 我使用NETWORK配置然后是S11吗？ - 幅度比=“T / R”=发射电平除以反射电平吗？我想我看到了T / R和相角的绘图（试图记住） - 我是否需要完成手册前面出现的CALIBRAtiON步骤“ 在我做扫描之前“零事” 实际上我真正需要的是实际按钮序列。 SPECTRUM对我来说很容易，因为我几乎知道我在做什么，所有控件都是熟悉的概念。但NETWORK的东西对我来说都是新的。先谢谢你，汤姆以上来自于谷歌翻译以下为原文 I have a 41952B 75ohm T/R Test Set and want to verify that it is functioning properly. (I'm using a 4195A Network Analyzer) The Operation Note has a basic method: Section 3 Operation: 3-4 Operator's Check however, it leaves a lot out for the non-expert. (I'm skilled in analog audio frequency electronics and a little radio - but no antennas and RF. So while having only a very basic understanding of T/R, I basically need a step by step to do the checkout on the analyzer. Paraphrasing, here are the steps: 1. Connect unit to analyzer with Test Port unconnected. 2. Set analyzer Stop and Start frequency to 10 and 500 mHz respectively 3. Set analyzer Output level to 0 dBm 4. "The network analyzer's magnitude ratio reading should be approximately 0 dB." 5. Connect a 75 ohm (I have the B unit) termination to the Test Port. 6. "The network analyzer's magnitude ratio reading should be less than -30 dB" What could be simpler? But here are some questions I have: - Do I use the NETWORK configuration and then S11? - does magnitude ratio = "T/R" = Transmitted level divided by Reflected level? I think I saw plotting of T/R and Phase Angle (trying to remember) - Do I need to go through the CALIBRATION step(s) that appear earlier in the manuals to "zero things out" before I do the sweep? Actually what I really need is the actual button sequence to do this. SPECTRUM is easy for me since I know pretty much what I'm doing and all the controls are familiar concepts. But the NETWORK stuff is all new to me. Thanks in advance, Tom 0
2018-11-27 15:27:09　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × kingnet_52040 该类别下有 195 个回答。邀请回答 60user7 该类别下有 81 个回答。邀请回答蓝色冰汐该类别下有 45 个回答。邀请回答醉狼工作室该类别下有 41 个回答。邀请回答 ianwhoani 该类别下有 30 个回答。邀请回答 dkhwakd 该类别下有 25 个回答。邀请回答 aaabbb567 该类别下有 23 个回答。邀请回答 e08506806 该类别下有 20 个回答。邀请回答 szzjfyp 该类别下有 18 个回答。邀请回答 ningee 该类别下有 16 个回答。邀请回答 sonia87 该类别下有 16 个回答。邀请回答 zouqinxiang 该类别下有 15 个回答。邀请回答 xj5548 该类别下有 15 个回答。邀请回答 daichuangs 该类别下有 14 个回答。邀请回答 derek88 该类别下有 14 个回答。邀请回答 JST2006 该类别下有 12 个回答。邀请回答 hzmbs2016 该类别下有 12 个回答。邀请回答 fichesw 该类别下有 11 个回答。邀请回答 www037 该类别下有 11 个回答。邀请回答 ToGoodSoft 该类别下有 11 个回答。邀请回答举报代瑜相关推荐 • 幅频特性测试装置 6356 • 没有S参数测试装置的S11测量 2028 • 如何使用75欧姆VNA进行50欧姆的测量？ 3000 • 怎么将频谱分析仪扩展用作相位噪声测试装置？ 1523 • 请问设计远程幅频特性装置有什么意义 1498 • 求购一台网络分析仪安捷伦8753D 1465 • 请问8753A至S参数测试装置的电缆是否需要相位匹配？ 3546 • E5061B使用E-cal进行校准只能选择1端口cal 3024 • 8711A 12端口开关测试装置能进行适当校准吗 1396 • 反射计怎么分类？ 4209 1个回答

答案对人有帮助，有参考价值 0 我不知道VNA或程序，但我怀疑这要求你做的是用校准套件校准VNA（可能是85036B）。当您在75欧姆负载下终止测试端口时，理想情况下应该没有反射信号，因此-30 dB的S11是合理的。有三件事可以接近0 dB。在端口1打开的情况下测量S11。（这是零dB，因为几乎所有信号都将从端口1反射出来）测量S11时端口1短路。（这是零dB，因为几乎所有信号都将从端口1反射出来）测量S21，端口1连接到端口2（这是零dB，因为几乎所有信号都从端口1传输到端口2）如果您有几个衰减器，尝试测量它们的S11，一个连接器刚刚打开反射信号的幅度应该是衰减的两倍，因此6 dB衰减器的回波损耗为12 dB，因此S11的幅度约为-12 dB 。 S21应具有相同的幅度，但与衰减符号相反，因此10 dB衰减器将显示S21 = -10 dB。小心不要将75欧姆N连接器连接到50欧姆N连接器。 50欧姆N插头的公引脚直径比75欧姆插座中的母头大，因此公头50欧姆插头会损坏母头75 欧姆插座。如果你在50欧姆的女性中使用男性75欧姆，你将得到一个糟糕的连接。有一个75欧姆的插头设计，将与50欧姆的插头配对，没有损坏。但除非你100％确定你有它们，否则小心不要损坏你的设备。对不起，我不能再提供任何帮助了。我从未见过那个VNA。 Dave编辑：drkirkby于2013年7月30日9:02 PM编辑：drkirkby于2013年7月30日9:07 PM 以上来自于谷歌翻译以下为原文 I don't know the VNA, or the procedure, but what I suspect this is asking you to do is to calibrate the VNA with a calibration kit (probably 85036B). When you terminate the test port in a 75 Ohm load, there should ideally be no reflected signal, so an S11 of -30 dB would be reasonable. There are three things that would give close to 0 dB. * Measure S11 with a port 1 open. (This is zero dB since almost all signal would be reflected from port 1) * Measure S11 with a port 1 shorted. (This is zero dB since almost all signal would be reflected from port 1) * Measure S21 with port 1 connected to port 2 (This is zero dB since almost all signal is transmitted from port 1 to port 2) If you have a few attenuators, trying measuring S11 of them, with one connector just left open The magnitude of the reflected signal should be twice the attenuation, so a 6 dB attenuator would have a return loss of 12 dB and so the magnitude of S11 will be around -12 dB. S21 should have the same magnitude, but opposite sign to the attenuation, so a 10 dB attenuator would show S21 = -10 dB. Be careful not to mate 75 Ohm N connectors to 50 Ohm N connectors. The male pin of a 50 Ohm N plug has a larger diameter than a female in a 75 Ohm socket, so the male 50 Ohm plug will damage a female 75 Ohm socket. If you use a male 75 Ohm in a female 50 Ohm, you will get a poor connection. There is a design of 75 Ohm plug which will mate with a 50 Ohm one without damage. But unless you are 100% sure you have them, be careful not to damage your equipment. Sorry I can't be of any more help. I've never met that VNA. Dave Edited by: drkirkby on Jul 30, 2013 9:02 PM Edited by: drkirkby on Jul 30, 2013 9:07 PM

2018-11-27 15:34:55 评论举报李青