[问答]

请问这是常见的还是ecal模块坏或vna需要校准？

问答对人有帮助，内容完整，我也想知道答案 0 嗨所以我有一台e5071c网络分析仪，并有一个ecal模块套件。我有许多已保存的状态，并使用ecal为他们。然而现在似乎如果我改变状态和/或电缆，校准变得很糟糕，我看到s11曲线上的许多波纹（主要使用5GHz以上）因此不得不再次进行校准。这是常见的还是ecal模块坏或vna需要校准？谢谢，G 以上来自于谷歌翻译以下为原文 Hi so I have a e5071c network analyzer and have an ecal module kit. I have many saved states and use the ecal for them. However it seems now that if I change states and/or cables the calibration becomes bad and I see way to many ripples on the s11 curve(mainly use above 5GHz) therefore having to do the cal again. Is this common or is the ecal module bad or vna need to be calibrated? Thanks, G 0
2019-7-12 15:48:54　　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 sonia87 该类别下有 16 个回答。邀请回答 ningee 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 hzmbs2016 该类别下有 12 个回答。邀请回答 JST2006 该类别下有 12 个回答。邀请回答 bisong13 该类别下有 11 个回答。邀请回答 hu_wflllllllg21 该类别下有 11 个回答。邀请回答 fichesw 该类别下有 11 个回答。邀请回答举报汤赫禧相关推荐 • E5071C ECAL定向错误问题该如何解决？ 1139 • E5071C和Ecal装置：选择哪种校准套件？ 3267 • 85093B 3.5 mm ECal模块手册无法找到 2343 • 可以使用时域门控来获得ECal校准的校准残差值吗 1213 • 是否可以使用PLTS v2012与PNA进行远程通信并使用eCal模块N4692A进行校准？ 1714 • 请问ECAL校准的温度会影响测量结果吗？ 1205 • 为什么VNA校准和验证套件价格如此之高 1573 • 如何对校准集应用功率校准？ 1620 • E8364B PNA网络分析仪无法定位Ecal模块 3254 • 在电缆和同轴到波导之间使用ECal过渡是否可行 1186 2个回答

答案对人有帮助，有参考价值 0 校准后更换电缆肯定会导致不匹配问题。还有其他变量（例如环境 - 温度和湿度以及物理 - 电缆弯曲）会影响校准有效的时间长度。我个人也认为ENA使用的默认70 kHz IFBW太宽，通常将其降至3 kHz或以下。您还需要注意校准后添加到系统中的其他适配器（或校准后移除），因为它们会导致不匹配条件发生变化，从而影响校准。您可以考虑发布一些您正在看到的内容以及设置中正在发生变化的屏幕截图。以上来自于谷歌翻译以下为原文 Changing cables after a calibration can definitely cause mismatch issues. There are other variables (such as environmental - temperature and humidity and physical - cable flexure) that can effect the length of time that a calibration is valid. I personally, also think that the default 70 kHz IFBW that the ENA uses is too wide and usually drop it down to or below 3 kHz. You would also want to be careful with an additional adapters that are added to the system after calibration (or removed after calibration) as they can cause the mismatch conditions to change which will affect the calibration. You might consider posting a couple screenshots of what you are seeing as well as what is changing in the setup.

2019-7-12 16:04:33 评论举报卢兰凤

答案对人有帮助，有参考价值 0 yweyerwq 发表于 2019-7-12 16:19 校准后更换电缆肯定会导致不匹配问题。还有其他变量（例如环境 - 温度和湿度以及物理 - 电缆弯曲）会影响校准有效的时间长度。我个人也认为ENA使用的默认70 kHz IFBW太宽，通常将其降至3 kHz或以下。我在原帖中不太清楚，这里有一个更好/更深入的解释。我在4.9GHz到5.9GHz的频率范围内进行2端口ecal校准，然后保存状态，例如状态1.s11看起来很好，校准似乎工作，直到我改变状态并返回状态1，或者更换电缆，然后返回到我校准的相同电缆，然后校准似乎关闭。电缆长度为3英尺。以前没有这种情况发生过。校准可持续数小时或数天。当我进行手动校准时，与使用ecal时相比，它似乎不那么频繁。我会尽快上传一些图片。试图确定它是ecal还是VNA。以上来自于谷歌翻译以下为原文 I wasn't very clear in my original post, here is a little better/further explanation. I do a 2port ecal calibration on the frequency range 4.9GHz to 5.9GHz and then save the state for example in state 1. The s11 looks fine and the calibration seems to work until I either change the state and go back to state 1,or change a cable and then go back to the same cable I calibrated on then the calibration seems to be off. The cables are 3ft in length FYI. This used to not happen before. The calibration can last for hours or days. It seems to be less frequent when I do a manual calibration than when I use the ecal. I will try to get some pictures uploaded soon. Trying to determine if its the ecal or VNA.

2019-7-12 16:24:32 评论举报汤赫禧