I can't thank you enough really! Every time i search for something on the internet that i don't understand it that well, no matter how long I look, i always end in one of your videos! Thank you alot!
@pauldenisowski2 жыл бұрын
Thanks! I'm working on a lot more videos, so please stay tuned!
@mab77272 жыл бұрын
@@pauldenisowski Great!, ty!
@RADIOBUNKER732 жыл бұрын
Thank you for this amazing way to present in an easy way such technical information. Keep going !
@pauldenisowski2 жыл бұрын
Thanks! There are other phase noise related videos coming in the next few weeks, so please stay tuned!
@letstalkscience64946 ай бұрын
A very technical topic explained beautifully and in an easy to understand manner!! Thankyou!!
@pauldenisowski4 ай бұрын
Thanks!
@Albert-PhotonChem11 ай бұрын
A big like to the video! And an even bigger thank you to their creators!!
@pauldenisowski8 ай бұрын
Thank you!
@yuniorgarcia3827 ай бұрын
Great video, very good resume of Phase Noise!!!
@pauldenisowski7 ай бұрын
Thank you!
@ArchanaSingh-pu2po Жыл бұрын
It was great to learn phase noise in a very simple and nice way. After lot of efforts finally i got this video, Its really great.
@pauldenisowski Жыл бұрын
Thanks!
@Ahmet_Yilmaz Жыл бұрын
Thank you. Finally i understood clearly.
@pauldenisowski Жыл бұрын
Thanks for the feedback!
@tydengr Жыл бұрын
Perfect video, very easy to understand
@pauldenisowski Жыл бұрын
Thank you!
@jtkim8623 Жыл бұрын
Great lecture! I am also waiting on Allan variance topic. Thanks!
@pauldenisowski Жыл бұрын
Thanks! Allan variance is on the to-do list :)
@mikehaladjian3958 Жыл бұрын
Very nice presentation 👏 👌 👍 😀
@pauldenisowski Жыл бұрын
Appreciate the feedback!
@MJ-us4gw Жыл бұрын
Very clear and helpful! Thanks!
@pauldenisowski Жыл бұрын
Thank you!
@blackbriar6178 Жыл бұрын
A clear and concise presentation that I found it technically informative and easy to absorb as an introduction. Where do I find this short powerpoint presentation for future reference?
@drewwollin3462 Жыл бұрын
The best video on phase noise. One thing not mentioned is that spectrum analysers can only be used to measure phase noise where the phase noise of the DUT is worse than the phase noise of the spectrum analyser. This is a problem for low-phase noise oscillators, hence the need for cross-correlation phase noise analysers.
@pauldenisowski Жыл бұрын
Thanks! And yes, you're absolutely correct. I did a separate video on cross-correlation since it is, as you mention, a very important topic when measuring low-phase noise devices.
@joelw7812 жыл бұрын
great explanation. Really well done.
@pauldenisowski2 жыл бұрын
Thanks for the feedback -- very much appreciated!
@quanvu37952 жыл бұрын
thank you for this video, but I have a question. how much does the power of carrying wave? If i gain the power of carrying wave, phase noise will change or fix?
@ernestb.23777 ай бұрын
Great, clear and to the point educational videos to get the basic understanding. One question if I may. Older spectrum analyzers do not go so low in RBW to 1Hz, nor have automated measurement of phase noise. When doing manual measurement with specific RBW (for example mine goes to 200Hz) do you divide the measured power (at some specific offset, like usual 10kHz) in dBm by 200 to get [dBm/Hz]? Thanks
@ernestb.23777 ай бұрын
Edit: I just found my answer in the next video 😁 It's not just diving, it is subtracting the 10log(RBW_used).
@ernestb.23777 ай бұрын
Oh, I was right, only one problem, you need to divide the measured power in [W] by the RWB _used and not in [dBm]! dB's are (of course) all about "adding and subtracting".
@alexciobanu381911 ай бұрын
ty )
@Tom-dn5de Жыл бұрын
It's a great video. Thank you a lot! I also see the term "phase error" in the Specifications of R&S products, so what is the difference between "phase error" and "phase noise"?
@pauldenisowski Жыл бұрын
Thanks. Usually "phase error" means "deviation from ideal phase angle", for example, in digital modulation (See the video "Understanding EVM"). Basically, the received symbol's phase differs by this amount from what it should be. Phase noise is unintentional variation of a signal and, as far as I know, is what is specified for instruments. If you have a particular R&S document in mind, please send me a link and I'd be happy to take a look. Thanks again!
@tienpham90872 жыл бұрын
question, how to determine the phase noise signal level it good or bad. what the limit.
@pauldenisowski2 жыл бұрын
That's a complicated question :) There are some applications that are relatively immune to even very high levels of phase noise, and there are some applications where even very low phase noise might cause problems. Generally speaking, higher modulation orders that use phase modulation (PSK, QAM, APSK) have stricter phase noise requirements: e.g. 64QAM requires much lower phase noise than QPSK. Phase noise is usually reported as curves (like the one shown in this presentation) so that you can see what the phase noise is at the frequencies that are interesting / important for your application. If you haven't already, you might want to watch the videos "Understanding APSK and QAM", "Understanding EVM" and "Interpreting Constellation Diagrams" for a better, more visual, explanation of what phase noise can do in modern digital modulation systems. One last note: most standards, like 5GNR, 802.11 (Wi-Fi), etc. specify required EVM levels (in %, for a given modulation order) rather than permissible phase noise. Hope that helps!
@PhillipFeldman2 жыл бұрын
What are the units of integrated phase noise?
@pauldenisowski2 жыл бұрын
Usually they are (a) residual PM in degrees, (b) residual AM or FM in hertz, and (c) jitter, in seconds. There's actually a video coming out in the next few days that shows these measurements (and their units) on our phase noise tester. Longer term, I'm also planning a video on integrated phase noise measurements (a topic that really needs a video of its own). Thanks for the question!
@SawdustDad2 жыл бұрын
@@pauldenisowski I would definitely appreciate the video on integrated phase noise measurements - in particular how to derive jitter (in units of secs from phase noise in units of dBm)
@mi_thiran2 ай бұрын
Thanks for the excellent explanation. Loved it and was motivated to explore more..
@pauldenisowskiАй бұрын
Thank you!
@alessandrolima42662 жыл бұрын
Amazing presentation
@AL6S007402 жыл бұрын
On point. I am in love.
@pauldenisowski2 жыл бұрын
Stay tuned for many more phase noise videos in the next few weeks! :)
@musraphaberkane6023 Жыл бұрын
Do you have a video about Alan variance?
@pauldenisowski Жыл бұрын
Not yet, but it's on my to-do list for 2023. I'm also hoping to do some additional content on other phase noise related topics.
@taylorjames5923 Жыл бұрын
Very nice presentation 🤔👍👍🧘♂
@pauldenisowski Жыл бұрын
Thank you!
@gorkyshawnpl29162 жыл бұрын
Very well explained
@pauldenisowski2 жыл бұрын
Thanks you!
@yasserothman40232 жыл бұрын
@2:36 the 2nd plot may i know what the label of the y axis ? Is it Power ? Also @2:36 2nd plot may I know mathematically how did the time changing phase cause spectral broadening in other words how did we get this skirt shape Vs Freq ? @3:57 you mentioned that it is generally easier to work with less Freq signals , may I know why ?
@pauldenisowski2 жыл бұрын
Those are all great questions. The y-axis of the frequency domain on slide 3 and 4 is power, usually measured in dBm. The math behind phase noise measurement is a bit too complicated to type in a KZbin comment :) Conceptually, it might help to imagine that the sidebands or skits are a probability density function (PDF). If the oscillator were perfect, the frequency would be constant and the PDF would be a single line. A real oscillator might have small frequency variations away from the nominal frequency most of the time, and larger excursions from the carrier less often. This isn't really exactly how it works (mathematically), but it might help in explaining the shape of the phase noise sidebands or skits. There are lots of reasons why it is easier to work at lower vs. higher frequencies. Passive components (resistors, capacitors, inductors) and even wires or traces start behaving non-ideally as frequency increases. For example, wires start developing inductance at higher frequencies and capacitors also start developing a series inductance and resistance: this greatly complicates circuit design and analysis. Higher frequency components also cost more than lower frequency components :) There are many more examples, but the use of downconversion is extremely common in RF applications. Thanks again for the questions! Hope that helps.
@jacobrandall48912 жыл бұрын
@@pauldenisowski you don't want to get down too low in the frequency realm or you open yourself up to potential interference from DCDC power supplies. Also large power electronics can resonate between 1-100MHz, CPU clock signals, etc. Downsizing is very sensitive to the rest of the system and it's quite fascinating 😀