过滤进入统计数据的测量值

您没有说明您正在使用哪个范围测量，但是您是否查看了“设置”和/或“保持”测量？
另外，您是否为您的示波器运行最新版本的SW？
人



     以下为原文

  You don't say which of the scope measurements you are using, but have you looked at the 'setup' and/or 'hold' measurements?

Also, are you running the most recent version of SW for your scope?

Al

我们尝试使用边缘测量和增量时间测量来测量它。
建立和保持测量不是我们在这种情况下需要的测量。
从中间到中间也是衡量标准。
我们需要从时钟信号中间到数据信号SW的VOH / VOL REV：05.50.0009谢谢Alex



     以下为原文

  We tried to measure it with edge-edge measurement and delta time measurement.
The setup and hold measurements are not the one we need on this case.
Also the are measure from middle to middle. We need from middle of clock signal to VOH/VOL of data signal 

SW REV: 05.50.0009


Thanks
Alex

Dang，我走开了一会儿，网站让我退出......让我看看我是否可以重新创建它。
首先，您应该更新到最新版本的SW，5.51.0002。
在这一点上，5.50.0009大约是15个修订版。
它可以在这里找到：http：//www.keysight.com/main/editorial.jspx？cc = US＆amp; cs = eng＆amp; ckey = 2046387＆amp; id = 2046387我相信你需要的是设置测量。
它是从“数据”信号的当前转换到“时钟”信号的第一次转换的时间。
“时钟”和“数据”都是任意定义的。
对于您的测量t1，“数据”将是您的CLK，“时钟”将是您的数据。
至于使用的阈值，每条迹线只有一组定义的测量阈值。
但是，您可以使用“放大/复制”功能制作曲线的副本。
如果您制作2份副本，并为VOH设置一个阈值，为VOL设置一个阈值，那么您应该能够进行所需的测量。
它并不完美，但应该有效。
顺便说一句，合规性应用程序，如果它们可用于你正在使用的标准，请为你处理这个烂摊子。
在大多数情况下，他们使用函数进行测量，并过滤“不良”结果。
人



     以下为原文

  Dang, I stepped away for a minute and the site logged me out... Let me see if I can recreate it.

First, you should update to the latest version of SW, 5.51.0002. 5.50.0009 is about 15 revisions back, at this point. It is available here:
http://www.keysight.com/main/editorial.jspx?cc=US&lc=eng&ckey=2046387&id=2046387

I believe that the setup measurement is what you need. It is the time from the current transition of a "data" signal, forward to the first transition of a "clock" signal'. Both "clock" and "data" are arbitrarily defined. For your measurement t1, "data" would be your CLK, and "clock" would be your Data.

As for the thresholds used, there is only one defined set of measurement thresholds for each trace. You can, however, make copies of traces using the "magnify/duplicate" function. If you make 2 copies, and set the threshold of one for VOH and one for VOL, then you should be able to make the measurements you need.

It's not perfect, but it should work.

BTW, the compliance apps, if they are available for the standard you are using take care of this mess for you. In most cases, they use functions to make those measurements, and filter the 'bad' results.

Al

设置时间和保持时间不是我需要的。
设置时间是从数据线到达当前逻辑电平到数据采样此级别的时间。
我需要从数据离开前一个逻辑电平到时钟中间时钟中间的时间。
保持时间相同。
=>这不是我需要的。
我需要测量eMMC协议中的tRQ和tRQH。
它不是设置和保持时间。
此外，如果我将数据作为时钟和时钟切换为数据，我将得到错误的测量 - 我想我已经厌倦了。
感谢Alex编辑：AlexBir于2015年11月30日上午8:03编辑：AlexBir于2015年11月30日下午10:20



     以下为原文

  Setup time and hold time are not the the one I need.

Setup time is the time from the moment data line reached the current logic level until the data sample this level.
I need the time between the moment when data leave the previous logic level until the clock middle of the clock edge.

The same for hold time. => it is not what I need.

I need to measure tRQ and tRQH in eMMC protocol. It is not setup and hold times.

Also if I switch data as clock and clock as data, I will get wrong measurements - I think I tired it already. 

Thanks
Alex

Edited by: AlexBir on Nov 30, 2015 8:03 AM

Edited by: AlexBir on Nov 30, 2015 10:20 PM