Another great video, thank you! Really love the pencil sketches and calculations, their neatness and technical clarity is something to aspire to in my own lab notes!
This is great. Only three people out there forgot to factor in cable delays into the equation. I suspect after watching this video they realize they charged people money for making incorrect adjustments hence the three dislikes. Thanks for another great video!
My 1989 analog Tektronix 2247A with digital co-processor has built in Delta time with movable cursers, which can readout in time, or Hz. It also has automated rise and fall time, and cursers in voltage mode. Thanks for the tip on different signal time propagation correction👍
Oh hey, a reMarkable! Product of my country (Norway). I love that thing. Incredibly expensive, but it has been an amazing device for me since I got it. Fascianting how they managed to get an e-paper display to react that quickly, I didn't think it was possible. Hope the technology gets cheaper, I think a lot of people would enjoy these kinds of electronic paper devices. Great video as always, too!
I just discovered your channel. I have been watching your videos for the past few hours. They are great one of the best on UA-cam! Thanks again for another great explanation.
I love the various signal (delay) tuts you've put out Alan - I had particular fun following the 'poor mans' TDR tutorial for which I had reasonably good results. this is another great one, many thanks
Another great set of notes to add to my huge "W2AEW" Video Notes binder...what a wonderful reference sitting right next to a similar binder with Ward Silver N0AX's QST Hands on Radio series. Thanks for sharing Alan! 73 - Dino KL0S
Yes, Alan is back!!. Great video. I have to get a better oscilloscope and function generator with delay feature... That option is not available on all function generator. Thank you
Thank you Alan for all the wonderful videos. You are amazing. Your instructional videos are feast to ears, have been listening to you for a while now. A suggestion for next video, if I may: A design that I am working on requires RF splitter/divider and mixer. The most apparent solution I found is mini-circuits, but they are so expensive. You have some great videos on mixers but not on splitters. It would be great if you can make a video explaining these devices (splitters) and some practical designs/techniques for DIY. Thank you!
Thx, nice trick lesson! You have to be so carful making those measurements, like Dave eevblog say “trap for young players”, well this old player has to keep his eyes open as well!
I have at work an advanced Lecroy oscilloscope. They propose measurements using skew of clock by reconstructing a clock from a data signal using embedded what Lecroy call golden pull. Lecroy even talks about Bathtub measurements. Very confusing topics, what do these terms mean, clock skew, clock noise, how to properly measure a clock deviation. They often talk about clock deviation due to pll noise, power supply noise. What measurements can we do to tell that this deviation, this skew or this noise is acceptable to such applications.
Yes, many performance oscilloscopes from Tektronix and others have Jitter and Eye Diagram analysis tools for characterizing high speed clock and serial data signals. This includes characterizing the many different types of Jitter on clocks and serial data streams, eye diagram parameters including BER vs clock offset/skew which includes bathtub curves. These tools are used to characterize the signal integrity of high speed digital signals.
Thanks a lot, wary smart! I was thinking if you start by mounting both cable to a signal generator with no delay between A and B, you could also get the difference there, before measuring DUT, if one is to lazy. :-)
Hi Alan, could you produce a video on how to deskew scope probes? With and without a deskewing test fixture, like the Cal/Deskew test fixture,Tektronix 067-0405-00. Thanks!
Hi Alan, that looks like an awesome tablet. Can it hold hundreds of PDF's ? I have hundreds of device data-sheets and application notes.... if there was a way to organize them and quickly access them on this device then this could be an absolute winner for me because I like to read data-sheets like printed paper in my hands rather than staring at a computer screen. The fact that it looks like paper and has the writing capability is just icing on the cake.
Hi, good technical video ! I wanted to know where you're writing ? Is it a numerical device (model ?) or a standard paper behind a glass ? Thanks for all infos.
Nice video! Is there a way to do this with a cheap differential probe and a normal 10:1 probe? I can't swap the probes and only the expensive probes have a skew compensation.
A bunch of modern scopes allow you to artificially delay one trace over the other, thus you can take the cables, feed them exactly the same signal, bring them into alignment and then they act like same length cables.
@@w2aew Wow, I didn't notice that was an electronic device. I was so focused on the drawings I kinda noticed the odd looking bezel and a brain cell or two fired I but didn't pay much heed after that. Drawings look absolutely awesome, though! I'd get one but man, that's pricey.
This has noting to do with your video, but since you know alot about Tektronix products..what is a "TEKTRONIX TYPE 191 CONSTANT AMPLITUDE SIGNAL GENERATOR "? Thanks....
It is a sinusoidal signal generator that is designed to output a precisely controlled, user-adjustable output amplitude. Information and manual available here: w140.com/tekwiki/wiki/191
@@w2aew Ah lots of practice. If you don't mind providing more advice I have another question/statement.. Lots of the time I feel overwhelmed with the amount of information I need to be learning, it frustrates me so much in fact that it becomes a mental block and I reject the pursuit for new knowledge regarding electronics, (demotivating). Have you ever had the same feeling or has your passion been strong enough to willingly further your knowledge on the subject. Thank you.
@@douglas4298 Totally understandable. Electronics is a very broad field, so it can be daunting to face so many unknowns. My advice is to start with getting a firm grasp of the fundamentals (ohm's law, passive device characteristics, DC and AC circuit fundamentals, active device properties and characteristics, etc.). Everything builds off of the fundamentals. Then, learn more things, bit by bit, as needed to do your work/hobby/etc. After more than 40 years in electronics, there is still a LOT more that I don't know compared to what I do know.
My very short review: Positives: - Very good pencil & paper feel when writing - Several pen, pencil, brush settings and selections - Very lightweight - Very good battery life - Easy export to PDF files - Can read PDFs and mark them up (lines, highlights, etc). Negatives: - Very expensive - Folio not included, and very expensive (found a cheaper one on Amazon) - No backlight, needs good room light to use (similar to Kindle)
@@w2aew Hey, what do you think about the remarkable? When drawing circuits and stuff? Its a little expensive, but it looks really nice. I was thinking about getting one.
@@SK-dv6yc Definitely pricey. Emulates the feel of pencil and paper quite well. Pretty easy to edit, cut/drag, etc., and can even be used to mark up PDF files. Hard to justify the cost, but overall I like it.
Mannn you won't believe but youtube is so weird. It didn't recommend your video on top which I am actually searching for rather it's suggesting working principles of CRO lol ☠️
Heard that NTSC stands for Never The Same Color and I can guess that that is what you are referring to. Would love to hear an in depth explanation related to this.
gamingSlasher a little bit deeper: NTSC color variation comes from non constant phase variiations during signal transfer (the color component in particular). PAL alternates the signals phase between each line by 180 deg. so that these variations can be compensated by doing (circuitry) math.
Another great video, thank you! Really love the pencil sketches and calculations, their neatness and technical clarity is something to aspire to in my own lab notes!
The style of Alan's notes remind me a lot of the project 'Notebooks' that were available years ago in Radio Shack stores...
This is great. Only three people out there forgot to factor in cable delays into the equation. I suspect after watching this video they realize they charged people money for making incorrect adjustments hence the three dislikes. Thanks for another great video!
My 1989 analog Tektronix 2247A with digital co-processor has built in Delta time with movable cursers, which can readout in time, or Hz. It also has automated rise and fall time, and cursers in voltage mode. Thanks for the tip on different signal time propagation correction👍
Oh hey, a reMarkable! Product of my country (Norway). I love that thing. Incredibly expensive, but it has been an amazing device for me since I got it. Fascianting how they managed to get an e-paper display to react that quickly, I didn't think it was possible. Hope the technology gets cheaper, I think a lot of people would enjoy these kinds of electronic paper devices.
Great video as always, too!
I just discovered your channel. I have been watching your videos for the past few hours. They are great one of the best on UA-cam! Thanks again for another great explanation.
That was some very useful information and way more interesting than I was expecting when I first saw the title of the video.
Perfect description of skew. subscribed matey!
I love the various signal (delay) tuts you've put out Alan - I had particular fun following the 'poor mans' TDR tutorial for which I had reasonably good results.
this is another great one,
many thanks
I'm always excited when I get a notification from your channel. Thank you so much for sharing your knowledge and experience!
Another great set of notes to add to my huge "W2AEW" Video Notes binder...what a wonderful reference sitting right next to a similar binder with Ward Silver N0AX's QST Hands on Radio series. Thanks for sharing Alan! 73 - Dino KL0S
Yes, Alan is back!!. Great video. I have to get a better oscilloscope and function generator with delay feature... That option is not available on all function generator. Thank you
Thank you Alan for all the wonderful videos. You are amazing. Your instructional videos are feast to ears, have been listening to you for a while now. A suggestion for next video, if I may: A design that I am working on requires RF splitter/divider and mixer. The most apparent solution I found is mini-circuits, but they are so expensive. You have some great videos on mixers but not on splitters. It would be great if you can make a video explaining these devices (splitters) and some practical designs/techniques for DIY.
Thank you!
thanks i love your videos since you make easy to understand and show it in a practical way, great video too
Thx, nice trick lesson! You have to be so carful making those measurements, like Dave eevblog say “trap for young players”, well this old player has to keep his eyes open as well!
Yes even "grey beards" can get trapped in traps for young players...
Thank you! Your videos are treasure! 👍🏻👍🏻👍🏻👍🏻
Hi Alan,
Excellent video. The visuals make it easy to understand the difference between delay and skew. 73 WB3BJU
Smart trick, learned something new, and you can calculate the exact length difference of the cables as well.
That is a great analog oscilloscope. Thank you for the lesson.
Great and informative, as always.
pozdrav v slovenijo :) lepo da se kdo gleda Alana, res je car!
Good video welcome back
Thank you so much for this video!
I've semmed skewed and delayed most of my life. It's going to be great to finally be able to measure it :-) LOL
73
Tim
nice video. well explained. thank you.
Great video! Thanks!
Excellent video!
Great Video, Alan.
I have analog and a digital scopes. I do like the look of the traces on the old 2465B more! :-)
Yaay, new w2aew video
Decent distinction.
Absolutely great!
Excellent, Alan! Thanks
I have at work an advanced Lecroy oscilloscope. They propose measurements using skew of clock by reconstructing a clock from a data signal using embedded what Lecroy call golden pull. Lecroy even talks about Bathtub measurements. Very confusing topics, what do these terms mean, clock skew, clock noise, how to properly measure a clock deviation. They often talk about clock deviation due to pll noise, power supply noise. What measurements can we do to tell that this deviation, this skew or this noise is acceptable to such applications.
Yes, many performance oscilloscopes from Tektronix and others have Jitter and Eye Diagram analysis tools for characterizing high speed clock and serial data signals. This includes characterizing the many different types of Jitter on clocks and serial data streams, eye diagram parameters including BER vs clock offset/skew which includes bathtub curves. These tools are used to characterize the signal integrity of high speed digital signals.
Thanks.
Loving it as always. Shame that one guy misclicked and hit the thumbs down button. Surely must have been a mistake.
Thanks Alan.
Hi is there any way to make a delay line with out any changes to signal and attenuation and up to any frequency???
Thanks a lot, wary smart!
I was thinking if you start by mounting both cable to a signal generator with no delay between A and B, you could also get the difference there, before measuring DUT, if one is to lazy. :-)
Hi I want to make a 100ns delay line for my rf signal but without coax cables and or lc delay line is there any other way??
Awesome video, thank you. What is the device which you are using to show you notes sir?
It is an e-ink tablet from www.remarkable.com
TNX for another great & informative video !
73 N8AUM
Hi Alan, could you produce a video on how to deskew scope probes? With and without a deskewing test fixture, like the Cal/Deskew test fixture,Tektronix 067-0405-00. Thanks!
How about a video on detecting Magnetic Flux with an oscilloscope
Hi Alan, that looks like an awesome tablet. Can it hold hundreds of PDF's ? I have hundreds of device data-sheets and application notes.... if there was a way to organize them and quickly access them on this device then this could be an absolute winner for me because I like to read data-sheets like printed paper in my hands rather than staring at a computer screen. The fact that it looks like paper and has the writing capability is just icing on the cake.
It has 8GB of internal storage. You can load and mark-up PDF files. See www.remarkable.com for more details.
Hi, good technical video ! I wanted to know where you're writing ? Is it a numerical device (model ?) or a standard paper behind a glass ? Thanks for all infos.
Nice video!
Is there a way to do this with a cheap differential probe and a normal 10:1 probe? I can't swap the probes and only the expensive probes have a skew compensation.
A bunch of modern scopes allow you to artificially delay one trace over the other, thus you can take the cables, feed them exactly the same signal, bring them into alignment and then they act like same length cables.
Yes, that's true. My scope has this feature, but I decided the video was long enough already ;-)
Another thing learnt today!! BTW, what's the clipboard you have? 73
It is an electronic tablet that mimics the feel of pencil & paper - made by www.remarkable.com
@@w2aew Thanks. It seems to be a great device but... a bit pricy I think.
Yes, I agree.
@@w2aew Wow, I didn't notice that was an electronic device. I was so focused on the drawings I kinda noticed the odd looking bezel and a brain cell or two fired I but didn't pay much heed after that.
Drawings look absolutely awesome, though! I'd get one but man, that's pricey.
Nuts! Thought it was an iPad app and was all set to go! @@w2aew
This has noting to do with your video, but since you know alot about Tektronix products..what is a "TEKTRONIX TYPE 191 CONSTANT AMPLITUDE SIGNAL GENERATOR
"? Thanks....
It is a sinusoidal signal generator that is designed to output a precisely controlled, user-adjustable output amplitude. Information and manual available here:
w140.com/tekwiki/wiki/191
Hello w2aew, very educational videos you have on your channel, how did you end up learning all of this information? (young electronics tech)
Mainly from about 35-40 years of experience working as a tech and then in design, test, validation and application engineering.
@@w2aew Ah lots of practice. If you don't mind providing more advice I have another question/statement.. Lots of the time I feel overwhelmed with the amount of information I need to be learning, it frustrates me so much in fact that it becomes a mental block and I reject the pursuit for new knowledge regarding electronics, (demotivating). Have you ever had the same feeling or has your passion been strong enough to willingly further your knowledge on the subject. Thank you.
@@douglas4298 Totally understandable. Electronics is a very broad field, so it can be daunting to face so many unknowns. My advice is to start with getting a firm grasp of the fundamentals (ohm's law, passive device characteristics, DC and AC circuit fundamentals, active device properties and characteristics, etc.). Everything builds off of the fundamentals. Then, learn more things, bit by bit, as needed to do your work/hobby/etc. After more than 40 years in electronics, there is still a LOT more that I don't know compared to what I do know.
Nice one. Notice how the signal delay is the average of the two measurements...
Could u give a short review on the remarkable tablet? it looks interesting and i would like to know your thoughts on it :D
My very short review:
Positives:
- Very good pencil & paper feel when writing
- Several pen, pencil, brush settings and selections
- Very lightweight
- Very good battery life
- Easy export to PDF files
- Can read PDFs and mark them up (lines, highlights, etc).
Negatives:
- Very expensive
- Folio not included, and very expensive (found a cheaper one on Amazon)
- No backlight, needs good room light to use (similar to Kindle)
At 5:00, is that an EInk-Screen digital Notepad?
Yes, from www.remarkable.com
What's that digital sketchbook?
Yes, from www.remarkable.com
@@w2aew Hey, what do you think about the remarkable? When drawing circuits and stuff? Its a little expensive, but it looks really nice. I was thinking about getting one.
@@SK-dv6yc Definitely pricey. Emulates the feel of pencil and paper quite well. Pretty easy to edit, cut/drag, etc., and can even be used to mark up PDF files. Hard to justify the cost, but overall I like it.
Wow! - I thought that was just a paper pad and pencil!
Oh - $899 Australian. I think my wife will say keep on using a real pencil... :(
@@w2aew thank you
Is this the new beta version of DaveCAD?
Not the Delta time then?
The "delta time" function of the delaying timebase is good for longer delays, not so much for very small delays like this.
👍👍
Mannn you won't believe but youtube is so weird. It didn't recommend your video on top which I am actually searching for rather it's suggesting working principles of CRO lol ☠️
this trick describes the principle difference between PAL and NTSC
Heard that NTSC stands for Never The Same Color and I can guess that that is what you are referring to. Would love to hear an in depth explanation related to this.
gamingSlasher a little bit deeper: NTSC color variation comes from non constant phase variiations during signal transfer (the color component in particular). PAL alternates the signals phase between each line by 180 deg. so that these variations can be compensated by doing (circuitry) math.
Very nice to know. Thumbs up! One thumbs down from some guy who failed math apparently :)