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?
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.)
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?
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
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."
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
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.
![Hunxho - Ball Forever [Official Video]](http://i.ytimg.com/vi/nki9ZTF9Uls/mqdefault.jpg)
Very nice presentation with very useful information.
Thanks!
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.
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.
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?
Great presentation!
I'm here for ElectroBOOM.
Histograms and FFTs of math sources, that's just so cool!
Fantastic scope! What it can display is extremely useful. I really need a Keysight scope. Thanks for the great video!
I'm dreaming a scope like this every night 😄
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.
From Jitter Bug to Jitter Debug.
Nice demo.
Gimme da Keysight to see da jitta!
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.)
How can jitter affect lane latency is jesd204b ?
can you please share how to measure Phase noise video showing step by step
good idea!
What shampoo do you use? I want hair like that too.
Pure electrons
I want my parents and friends to buy me this kind of scope for my next birthday.
perfecto la moriano
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?
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
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.
I want the keysight too plz but make sure it's me you give it to thx :)
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
Gimme da keysight😜
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!
Gimme das keysight
what a wonderfully disagreeable millennial voice! is this for 12yo who only know how to press buttons...
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!