[问答]

关于示波器垂直位置/偏移极性的问题

问答对人有帮助，内容完整，我也想知道答案 0 我发现各种安捷伦示波器产品在垂直位置/偏移的极性读数方面存在一个有趣的差异。在我的Agilent U1602A手持式示波器上，如果我在示波器上向上调整波形（相对于零基线的正偏移），数字显示实际上显示正偏移读数（例如偏移= +1.0 V）如果我在我的上做同样的事情 U1620A（安捷伦手持式示波器的较大版本），向上移动波形会产生负偏移读数，向下移动会产生正偏移读数。这让我很困惑，所以我查看了另一个安捷伦示波器（4000系列），并且在向正方向移动波形时也显示负偏移数。我之前没有注意到这一点，但通常我习惯于期望Y轴上向上移动产生正偏移，并发现这种反直觉。有人可以解释这种行为和理由吗？但无论理论如何，两个手持式安捷伦示波器的工作方式都不同，这使得它更加令人费解。我想这取决于你的背景是什么是“参考”---但如果我有，例如，0-5V方波和基线（0伏）坐在屏幕的中心X轴 - - 然后我调整波形“向上”，比如1伏（这样波形在1到6V之间，显示屏显示偏移为-1.0V。真的吗？不是偏移1V？还是在说我需要“加”-1V来获得真正的读数？当然，这与减去1V相同 - 从向上=正偏移和向下=负偏移的角度来看，似乎更直观。我我对其他人对其示波器的看法感兴趣，以及为什么不同型号的安捷伦示波器会不同地处理垂直偏移/位置。谢谢！以上来自于谷歌翻译以下为原文 I am seeing an interesting discrepancy between various Agilent scope products relating to the polarity reading of the Vertical Position/Offset. On my Agilent U1602A handheld scope, if I adjust the waveform upwards on the scope (positive offset relative to zero baseline), indeed the numerical display shows a positive offset reading (e.g. Offset = +1.0 V) If I do the same thing on my U1620A (a larger version of Agilent handheld scope), moving the waveform up causes a negative offset reading, and moving it down causes a positive offset reading. This puzzles me, so I looked on another Agilent scope I have (4000 series) and it also shows a negative number for offset when moving the waveform in the positive direction. I hadn't noticed this before, but typically I'm accustomed to expecting a positive offset resulting from a move upwards on the Y axis and find this counter-intuitive. Can someone explain this behavior and the rationale? But whatever rationale exists, two handheld Agilent scopes work differently, which makes it even more puzzling. I suppose it depends on your context for what is the "reference" --- but if I have, for example, a 0-5V square wave and the baseline (0 volts) is sitting on the center X-axis of the screen -- and then I adjust the waveform "upward" by, say 1 volt (such that now the waveform is between 1 and 6V, the display shows the offset as -1.0V. Really? Isn't the offset 1V? Or is it saying I need to "add" -1V to get the true reading? Of course, this is the same as subtracting 1V -- and it seems much more intuitive to think in terms of upward = positive offset, and downward = negative offset. I'm interested in what others see on on their scopes and why different models of Agilent scopes would treat vertical offset/position differently. Thanks! 0
2019-1-30 14:04:23　　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 derek88 该类别下有 14 个回答。邀请回答 daichuangs 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 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 juujwfdf 该类别下有 11 个回答。邀请回答举报李燕相关推荐 • 示波器的垂直噪声从哪里来？有什么影响？ 1023 • Agilent 2012A具有偏移电压的垂直变焦行为 856 • 示波器垂直量测量出现偏差的原因是什么？如何减小示波器垂直量测量偏差？ 1739 • 函数发生器，只需要正极性的正弦波，接的是正端和公共端接到示波器上，为何从示波器上总是含有负极性的正弦波呢 6576 • 示波器的垂直分辨率对测量的影响 2246 • 关于AD9923A配置ICX274AQ的寄存器的疑问 2445 • 关于官方的AD9923A配置ICX274AQ的寄存器的疑问 2344 • 【安富莱——DSP教程】第44章示波器操作说明及其介绍 6034 • labview做示波器怎么实现波形在波形图上的垂直方向和水平方向的移动啊？ 11640 • 如何避免单层板PCB钻孔位置偏移的问题？ 522 2个回答

答案对人有帮助，有参考价值 0 U1602 / 04 / A / B只是一个奇怪的鸭子，可以这么说。以上来自于谷歌翻译以下为原文 The U1602/04/A/B is just an odd duck, so to speak.

2019-1-30 14:09:38 评论举报王琳

答案对人有帮助，有参考价值 0 克里斯，谢谢你的澄清。我现在了解基础。我缺少的关键点是，在大多数安捷伦示波器的情况下，屏幕中心不一定是地面 - 而是相对于地面的规定偏移。我正在考虑相反的方式 - 屏幕中心总是被称为接地（固定） - 并且偏移调整波形位置上下。我再次确认U1602A / B的工作方式相反，中心线始终为0伏，偏移/位置上下调整波形。正如@ksmith在早些时候的回复中所说，也许这个模型是该组织的“奇怪的鸭子”。在产品线之间保持一致会很好，但至少我现在已经清楚了解它的工作方式背后的想法。如果我更加关注轨迹上通道编号旁边的小“地面”符号，我会意识到偏差是如何计算的，以及为什么它看起来与你期望的极性相反。 U1602A / B在迹线旁边没有接地符号，因为接地始终以屏幕中心为参考。以上来自于谷歌翻译以下为原文 Chris, thanks for this clarification. I understand the basis now. The key point here that I was missing is that in the case of most Agilent scopes the center of the screen isn't necessarily the ground -- but the stated offset relative to ground. I was thinking of it the opposite way - that the center of the screen is always referred to ground (fixed) -- and the offset adjusts the waveform position up and down. I reconfirmed that the U1602A/B works in the opposite manner where the center line is always 0 volts and the offset/position adjusts the waveform up and down. As @ksmith stated in an earlier reply, maybe that model is the "odd duck" of the group. It would be nice to stay consistent between product lines, but at least I'm clear now on the thinking behind the way this works. Had I paid closer attention to the little "ground" symbol next to the channel number on the trace, I would have realized how offset was being computed and why it appears to be the opposite polarity of what you'd expect. The U1602A/B does not have the ground symbol next to the trace, since ground is always referenced to the center of the screen.

2019-1-30 14:39:43 评论举报李燕