How to Measure Jitter with an Oscilloscope - Scopes University - (S1E5)
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- เผยแพร่เมื่อ 30 ก.ย. 2024
- What is jitter and how should you troubleshoot it?
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Read the Jitter Analysis Application Note ►bit.ly/JitterAn... ◄
What is jitter? In this episode of Scopes University, we continue our conversation from the previous InfiniiVision episode where we discussed How to Set Up Eye Diagrams (episode 3):
• How to Set Up an Eye D...
Today, you’ll learn about what jitter is, what causes it, why jitter is bad, and the basics of troubleshooting it on an oscilloscope.
First, you’ll gain an understanding of what jitter is: the deviation from where an edge crossing actually ends up compared to where it ideally should be.
Next, we’ll discuss some of the causes of jitter. Jitter can be caused by components on your board (deterministic jitter) or by uncontrollable random noise (random jitter).
Then, you’ll learn why you should care about jitter and why you should measure it on an oscilloscope. If you have too much jitter in your signal, it will cause errors in the data you transmit.
Lastly, you will get a firsthand look at the jitter analysis tool on the oscilloscope. You’ll learn how to use the capabilities to identify what it is that’s causing the jitter, as well as what you can do to fix it.
By the end of the episode you will understand how to measure jitter with a scope quickly and easily.
Tune in for future Scopes University episodes covering more oscilloscope capabilities to see how you can test more efficiently!
You can ask me questions on Instagram: @keysightoscilloscopes
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Learn more about using oscilloscopes:
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The digital storage oscilloscope we used:
www.keysight.co...
(The Keysight InfiniiVision 6000 X-Series Oscilloscope)
This oscilloscope supports the most applications of any InfiniiVision oscilloscope, including power analysis, jitter measurements, and built-in dual arbitrary waveform generators. It features a 12.1 inch touch screen display and dedicated vertical control knobs for each channel. This all makes it the value leader in price for performance.
Scopes University is hosted by Erin East and Melissa Spencer. The video series covers when and how to use different applications and capabilities of the InfiniiVision and Infiniium oscilloscopes. You’ll gain familiarity with features that will help you save time in your measurement, further your analysis, and deepen your insight.
#ScopesUniversity #Oscilloscope #HowTo #ElectricalEngineering #EyeDiagram #Basics #Electronics #Robotics #Microcontrollers #InternetofThings #IoT #Breadboard #5G #ElectricalEngineers #Jitter #JitterAnalysis - วิทยาศาสตร์และเทคโนโลยี
How to measure jitter?
Step 1 - get a $20k oscilloscope which has a Jitter button on it
Step 2 - measure jitter
Believe this scope is 150K plus.
I'm here for ElectroBOOM.
I'm dreaming a scope like this every night 😄
Hey can you also walk us through how to measure jitter “without” a built-in jitter analysis tool on scopes?
she can't...she hired to just press buttons and read a script. Keysight unfortunately doesn't market to adults.
Gimme da Keysight to see da jitta!
what a wonderfully disagreeable millennial voice! is this for 12yo who only know how to press buttons...
Very nice presentation with very useful information.
Thanks!
What was the purpose of the pll in regards to measuring the jitter? Hasn’t it made your signal appear better than it is? Or is it a tool to help us improve our designs?
I want my parents and friends to buy me this kind of scope for my next birthday.
I want the keysight too plz but make sure it's me you give it to thx :)
Histograms and FFTs of math sources, that's just so cool!
From Jitter Bug to Jitter Debug.
Nice demo.
I've cut the red wire on mi cable so no power...and Check here I still have some noise no so big but it's there...do (iFi iPurifier3 Filtre de signal audio et de données USB) will corect that? soundcloud.com/hibou53/usb-noise
How can jitter affect lane latency is jesd204b ?
Fantastic scope! What it can display is extremely useful. I really need a Keysight scope. Thanks for the great video!
Great presentation!
Excellent video...
For jitter measurements should we use active or passive scope probes. Which do you recommend? Thanks
It depends what other factors you have to consider. Generally active probes are used because of the bandwidth of the signals being tested.
can you please share how to measure Phase noise video showing step by step
good idea!
perfecto la moriano
What sort of probe is needed for this, and what else is needed to keep in mind? any application notes for that ?
We have a lot of info about probing on this channel and on the Keysight web pages around probing. The scope doesn't really care what probe you are using for jitter, but you want to make sure you're using a probe that can handle your signal's parameters (Voltage, bandwidth, etc.)
لا ح
So half of the comments are from electroboom? Ok
Haha, yes we've seen a lot of comments from people coming from his channel!
Which oscilloscope model using on this video ?
It's a DSOX6004A - they start at 1 GHz.
You can find out more on the website here: www.keysight.com/en/pcx-x205214/infiniivision-6000-x-series-oscilloscopes?cc=US&lc=eng
Question: "20KHz TIE sinusoidal modulation has been eliminated by setting clock recovery PLL bandwidth to 200KHz." Is this a wrong statement. I think the 20KHz are well within the 200KHz PLL bandwidth and the 20KHz TIE will pass through PLL without attenuation. Please advise.
The loop bandwidth of the PLL used to extract the clock from the data signal is higher than the 20 kHz. This means that the clock frequency/phase will follow the 20 kHz jitter and the receiver will not be impacted by that jitter.
@@ricardonunes6724 can you elaborate a little? I am also a little confused... with a low-pass of 200kHz, aren't we letting the 20kHz modulated sine wave through?
@@acadacabra2010 From what I understood, the oscilloscope is using a PLL to generate a clock based on the data signal, which has the 20 kHz deterministic jitter on it. Then, it locks to that clock. As the loop bandwidth of the clock recovery PLL is larger than the deterministic jitter frequency, the recovered clock will also have this jitter. As the jitter appears now both on the recovered clock and on the data, a receiver which is locked to the recovered clock will not see the jitter. If the loop bandwidth of the clock recovery PLL was lower than the deterministic jitter frequency, the recovered clock would not have the jitter and a receiver locked to the clock would still see the jitter.
@@ricardonunes6724 In the case with PLL, if the recovered clock also have this jitter, is the oscilloscope making an inaccurate measurement of eye diagram? The eye diagram is supposed to reveal all defects of the DUT, instead of locking on to something wrong, right?
Gimme das keysight
What shampoo do you use? I want hair like that too.
Pure electrons
Gimme da keysight😜
Came here because of ElectroBOOM, stayed for the useful and well-produced content. This video is a great introduction to jitter, and it filled in some gaps for me. Now I know why I need a better scope. :)
Minor quibble: I believe "Gaussian" is pronounced "gouse-ian", not "gaws-ian."
Thanks! Also, I'm going to chalk that pronunciation up to a subtle NY accent.
OMG you guys are hell bent on over-complicating stuff, abbreviating unnecessarily long terms and pimping those scopes.
"The bi-flodial crembrulators or BFC are simulated with the temponic krempt digileets or TKD. They are the same color as the omobaric sinusoidal rabbit ayenus flap or OSRAF"
Ok. Shit changes time when it is supposed to be there. The scope shows it. Look at the pretty colors. End.
Ferd Dorst Hahahahaha. Thats funny stuff. You insinuated that they were related. Thats a real knee smacker!