Oscilloscopes For Audio 101 - Part 3 - Oscilloscope Basics - How to Use One
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- Опубліковано 31 тра 2024
- BG300 - Part 3 in our series on oscilloscopes for audio usage. This one focused on the basics of an oscilloscope. Vertical, horizontal functions, triggering, measurements, analog & digital scopes, etc.
- Наука та технологія
Thanks for this one and the previous two. There are so many oscilloscope videos on the internet that show things without teaching well. Yours is way better because you explain how things work, why they are that way, and give practical, real world examples and information. And you go beyond the oscilloscope, which really was very helpful in the first two videos. I can’t thank you enough.
Yeah there are tons of videos but they are poorly made, they leave of a bunch of info off or they create more questions in your head because they don't answer them or give you a convoluted answer.
The other thing that the videos don't show is how to hook up the leads (bnc cables) to the unit being troubleshooted or the probe and its ground lead being hooked to ground and the probe being used.
Mark, really great video. you have taken something that looks really intimidating and made it really doable. Haven't touched an oscilloscope since the 90s during basic EE labs. I'm an aero engineer. you never really got to learn and play with the equipment. I can see this being really useful in guitar pedal builds. hoping to build up to building a tube amp someday.
I raise my glass for your #300!
Hi Blueglow. I'm COOLBLUEGLOW - for twenty five years. :-) Appreciate this video, and I've been using scopes for decades. Very helpful. Thanks!
Mark, thank you so much for these tutorials. Just by chance, I actually have a 2246a. Imagine my joy to see you actually using one!
Haha first I learned a million ways to blow it up. Now I learn what it does, and I don't need one. Hooray! Great videos thank you!
Just finished the first three videos in your series. They are by far the best instructional videos I've seen for learning the o-scope. I'm a novice and bought a used scope on ebay two years ago. I've watched other videos, and played around with it, but this will really help me to understand. Can't wait to see the rest of the series. Thanks for sharing.
Thanks for your generous gift of time to explain this stuff. I recall long ago taking a faulty amplifier to a local tech legend. He put it on a scope and told me within three minutes what was wrong. I look at mine everyday and think someday. Videos like this are a tremendous source.
Wow! What an amazing video! A visual walk-through like this is a million times more helpful than a PDF manual any day of the week. And now with the overview you gave, digging into the manual will be so much easier to do if I need to dig any deeper. I consider myself extra lucky since I have a nearly identical model and now I know how to get started using it. Thanks very much for putting such a helpful guide out there for all of us to benefit from. I'm very grateful.
Thank you!!! After looking at a zillion scope tutorials this one really gets to the point. I like the way you explain the what for and not just the how and what knob. You do a good job of explaining what the function does. Again thank you.
New subscriber here. Thanks for sharing your experience and knowledge with us.
This is the best oscilloscope intro video on UA-cam!
Looking forward to watching all the others.
Thank you for taking time to create this.
Surely 1/16.6666 = 0.06 seconds, so you need to multiply by the 1000 go convert the milliseconds measurement to seconds = 60.
Yep
correct, should have mentioned that
A great video series, between Blueglow Electronics and D-Lab these guys are a wealth of knowledge for anyone looking to get a better grasp of electronics. They cover the tidbits that the classroom tends to leave out. Thank you.
Outstanding Presentation Blueglow. You are awesome! Thanks for taking the time to do this tutorial. I hope success and blessings come to you on this channel. A big thumbs up for the way you teach!
Just loving this series!
Great job - you explain things well! You don't overload with deep details. Can't wait to see the next ones! Congrats on 300!
Very informative! Congrats on 300! Thank you very much!
Years ago I had to use analog oscilloscopes in digital telephone switches. I don’t recall ever looking for ac signals we were looking for high or low input & outputs at specific timing intervals. Might be +5 volt high for 250ms for example. Everything was logic gates. AC testing I’m pretty weak on and why I’m watching you O scope series. Thanks for posting the videos
Congrats on 300! Enjoy watching all of your videos. I have learned so much, keep them coming!
Congratulations on that milestone!!!!
I had 2 glasses of wine 🍷 love your videos I always learn something
Great refresher session! Thanks.
Congrats on BG300! Yet another great video! Hoping for 300 more... Cheers!
Excellent video series!!
Excellent video from a beginner. I have purchased several vintage pieces of audio gear that I want to try my hand at repairing. Cassette, players mostly and a few integrated amplifiers. Thank you!!!
INVALUABLE! Thank you for doing this series
Thanks so much. I look forward to the next video.
Wow I cannot believe 300 videos have passed.
I’m looking forward to the next 300
Again, a much-needed video. Thanks for taking the time to make this for all of us.
A great series and a great teacher. Thank You!
I can't thank you enough for putting together this series. I have a 2247A and several broken amplifiers and have been trying to figure out where to start. So, if I could give you 10 thumbs up, I would!
This is JUST what I've been looking for. REALLY great! It's the most informative and easy to learn I've seen so far.
Great video. I learned a lot about triggering. I look forward to the next one. Thanks 😁.
A very good presentation again. Thanks!
Probably one of the best instructional videos I have seen on the oscilloscope. Great job!
Love it. Very helpful. I'm just getting into audio repairs and scopes so this series is great for me. Thanks!
Thank you so much for this series. Please continue your content, you’ve helped me so much ! Thank you again !
Great Video! This is the best series I’ve seen to learn the proper way to use a scope. Thanks!
Hello Mark, this oscilloscope series is great.
Congratulations! And thank you for the videos.
Congratulations on your 300th video!
Just wanted to thank you for taking the time to create this video series. SUPERB explanations, helpful and VERY thorough.
This series is going to make it worth my while to buy an oscilloscope. Thank you!!!
Another great video, Mark, thank you! I recently started repairing guitar amps and bought a Leader LBO-508 CRT o-scope that’s in great condition and is perfect for my needs. I never fully understood triggering but it makes perfect sense now after watching you video. Great stuff!
Great video, I am a first time Oscilloscope user.
A very good instructive video, Mark, very much enjoying this scope series of your's.
300 Videos and all of them are 100% Good ! Nice work !
I already have three pages of handwritten notes. Thank you again!
Thank you, this is a fantastic video and all is explained very well!!! GREAT!!
Great video. I have the 2 channel version of that Rigol. I still have only scratched the surface with all it can do. I am really enjoying this series. I can't wait till we get to parts 4 and 5 where I can really get into using the scope to do deep trouble shooting.
WOW BEST TEACHING I HAVE SEEN ON OSCOPE. THANK YOU
Thank you for the video Mark. This is exactly the type of instruction the majority of us UTubers need. It really helps break the barrier to entry.
Congratulations on your videos, nice thing to share. Blessings. Leo
Excellent !!!!
Thank you I have purchased aRapid Electronic 20 Meghertz scope just started to try to use it☺
Great video. I bought a used 2246 and I could not figure out what trigger was. Nice explanation! Waiting for the rest.
A nice piece of work! Thanks for your efforts, Mark.
Now a couple of yeah, but's! :)
One aspect of digital scopes that always comes to mind for me is that they're generally (well, the affordable ones are) only 8 bits of A/D conversion. That means that there are only 256 distinct vertical levels, and if we're looking at the positive half-cycle, for example, that's down to just a hair better than 1% resolution. (That's resolution, not accuracy!) If the signal is only half of the maximum for that range, it's only using half the discrete levels, so now we're down to 2%. On the other hand, the analog scope is smoothly continuous -- it's not affected by the same kind of discrete levels, nor does the effective resolution fall off when the signal gets smaller, and so it can present the fine details of the curve more accurately. It's not just about fade time of the pospher -- it really is better.
The other thing that comes to my mind when I consider the difference between analog and digital is that I'm comparing the electronics design and implementation of a $400 dollar scope with the electronics and design of a used $4000 scope that I got for less than $400 off of an auction site. My assumption (and experience) is that every aspect of analog electronics -- especially the input section which has to be analog in both scopes -- is going to be much more refined in the analog scope versus the (designed-to-a-price) circuitry in the digital scope. That would change if we were looking at $4000 (or higher!) digital scopes, but... not in my shop. :)
In other words... I'm not too quick to assume that the precision of the waveform is equivalent, or better, in a modest new digital scope, versus a nice (i.e. Tektronix), used analog scope. I absolutely LOVE my analog Tektronix scopes, for everything except capturing a waveform for later evaluation, which the analog scopes just can't do. There, I fire up the digital, and it's really good at that sort of thing.
Just a point of view... :)
thanks a lot ! such a good learning experience...
Subscribed! I want to learn how to repair and maintain amplefiers, speakers and mess around with CD players. It all starts with the basics, and this video makes is clear as day for a nitwit like me 👍🏼👍🏼
As you continue, or maybe in a separate video after you finish the series, you might comment on what can and can't be accomplished with one of the JYEtech kits like the DSO150 or DSO138. Only one input (but hey, you can afford two or more!) and very limited bandwidth (200 KHz?), but way cheap, $20-$30, "real" probe extra.
I already had an old Sencore 60MHz analog scope, but picked up one of these kits just for fun. And it was fun to build, pocket money well spent even if it never sees real use from my point of view. I haven't even tried to use it for any work yet, but I rarely have an occasion to use a scope at all. I figured I might use it sometimes when I don't want to drag out the boat anchor Sencore. It does do frequency and voltage measurements for you, and can hold the waveform on the screen, so better for looking at momentary glitches. It can be battery powered, so not ground referenced, which might come in handy as well for hot chassis tube work?
I think the question to be answered is, for audio work, is it at any time better than no scope at all?
Thanks Mark...My Tek 2245A has never shined brighter, and more accurate!
Great video. I know how to use a scope but I'm no expert so I got some good info from your effort. I have a Tek 465 but will be buying a Hantek digital scope in the near future. I plan on converting it to be able to run on either AC power or battery power because I work on vacuum tube equipment from time to time and wanted something that I could electrically float so that I don't hurt it or myself. Yes, I know I can use a differential probe but it's more fun to buy a new piece of test equipment. And besides, like you, I don't like lugging my 465 around.
Thanks Mark..I always been afraid of those digital scopes.
thank you for the informative video.. helped me get going with a tube based HP 100MHZ - running a mono signal in from a smart phone waveform app. the square wave is the most finicky to position stable on this machine.but I have this. :)
Congrats on #300! I took my new oscilloscope around the block and I didn't wreck it. 🤪
I just put in my order for a Siglent waveform generator based on this series.
Thank you Sir !
This is very good. Like learning to drive manual, or use the basic flight in Msft 2020. Love those clear button and in fact those two button in one. You also understand why it move on, other than good for learning. Colour, signal generator 2-in-1 and desk space (it has a lot of depth). Not seeing the end or other yet but hope there is a digital one. Gear towards there. 46:00 got it.
The digital does not generate signal. Would it be better separate function generator … from oscilloscope.
Chicks totally dig oscilloscopes. 👍🏼 At least I keep telling myself that.
Good basics demo! At 43:50 i propose to measure the time difference from zero crosing to zero crossing. This would be a little bit more precise.
On the 2246 channels 3 and 4 actually have independent voltage adjustment, its just limited. You'll see the buttons right next to them that say .5v and .1v. Those are your voltage selections.
Darned good stuff. Since this was for beginners, I think you should have grabbed a plastic probe adjustment tool and actually calibrated the probe. My 2465BCT has Ch1/2 inputs offer 1M-ohm AC/DC/GND and 50-ohm DC settings. Do you cover when to use the 1M and when to use the 50 in a different video? Thx.
300 Service video's, you deserve a chip. Congrats
That 2246 sure is clean! Did you buy it new?
Congratulations From Vienna Austria
I have trouble triggering on low frequency signals, any tips? It seems like I can eventually, but lots of knob twisting. I have a simple hitachi v 212 scope.
I’ve been watching your oscilloscope videos nonstop. Did you do any video work on testing audio opamps with oscilloscope? I want to buy some and experiment to learn but rumor has it there are many fakes.
Do these digital storage oscilloscopes with CRT displays drive the beam digitally after sampling the input with a ADC? Or so they operate like all analog scopes and the digital functions is sort of an add-on?
k You are better like my professor in university thanks
I want to see how an O'scope is used on an actual amp, receiver how you use the probes on the equipment and how to set the dials on the O'scope as you go to do the troubleshooting when will that be?
how did you apply DC voltage. Isn't scope hooked up the function generator. I saw signal move up but not sure where dc came from?
I am trying to repair a crown macro-tech 5002VZ. It's a giant amp from the 90's. I need a scope. I'm looking at a digital scope on amazon with a signal generator built in. I'm guessing I can use this for supplying sine waves to amplifiers, but I'm not sure. it says "only the frequency is adjustable," (meaning no amplitude adjustments i'm guessing). it says it can do sine, square, triangle etc. this is what they are calling it:
YEAPOOK ADS1014D 2 in 1 Digital Oscilloscope DDS Signal Generator with 2 Channels 100Mhz Bandwidth 1GSa/s Sampling Rate (ADS1014D)
it's just under $200
seems like it would be good for amplifier repair, but I'm not sure.
any opinions about this scope for amp repair?
one channel of the crown amp is not functioning properly. seems to get hot on the dead channel. I'm seeing a little dc on the output. I think it said around .9VDC on the bad channel. the good channel read near 0VDC
Hi Sir, good day. I would have liked to ask for help on how to use the old Hitachi model V-1565 oscilloscope I bought. I don’t know where to start and how to use. I’m an electronic habbies. I've always wanted an oscilloscope before but because it's so expensive I can't afford one. I just bought a 2nd hand oscilloscope and I think it works find and the other knobs are functioning and have power. I hope you have a video tutorial like the oscilloscope I bought. I really want to learn. Thanks a lot. From the Philippines.
i have a tektronix 2205 and when i put channel 1 at GND at auto P-P triggering i saw the zero line... but when i put it on normal mode triggering the line disapear... is that normal?
My interest is anything that uses Vacuum Tubes. My knowledge level hopefully is one step above hurting myself. I have plans to get a Digital Scope as soon as I get enough money.
Is using a Digital Scope on Vacuum Tube Equipment any different than what you will be talking about?
Beginner here. Why do you have the extra piece of equipment on top of the oscilloscope? Seems like the unit itself should have those fine adjustments that can be made?
I hope someone is still around to help me.. i bought a cheap o scope to check my car audio. The signal test is supposed to be 1khz but it reads 500hz.. Am i doing something wrong? Also its on x1 sometimes it switches to x10 but idk how to change it.
Did I hear correctly? There is no inverter with the 2246. Biasing phase inverter in tube amp it's useful to see both channels on the
"same" path.
Hi I just don't a wave line .I Tektronix 2246 100mhz oscilloscope and also have a fuction Generator model Instek .please help Thank you.
I have watched several videos about scopes, and one thing is never mentioned: The bar at the very top center with the arrow above it that is only on digital scopes. What is the purpose of this bar? Thank you for this fine series.
Shoot me a pic of what you are talking about to my email.
If I have a power supply of 400VDC can I put the scope on AC and check for a ripple on the DC if the scope has a lower volt rating?
If that is a switching power supply then you would need a high voltage differential probe to do that safely, and they typically have high attenuation so they can handle usually 700V or more.
Will you be discussing "oscilloscope music" in video 5 with the XY mode? 🙃
I will be using XY mode to show linearity between input and output, i.e. distortion
Oh, something practical! 😅 Thank you!
@5:59 1/16.666 does not equal 60. Checking the math, 60Hz would be 1 second divided by 60 (cycles): 0.16666667 seconds per cycle. 0.16666667 seconds is is not 16.66667 milliseconds; it is 166.66667 milliseconds.
If I've made a mistake, someone please point it out.
But a 1 second wavelength (1,000 milliseconds) would give a frequency of 1 cycle per second, or 1Hz. One-tenth of that wavelength, or 100 ms, would be 10Hz. And 10ms would be 100Hz. So, 60Hz does approximate as 17ms.
I guess this reinforces the point made @4:44 that engineers don't speak in milliseconds when dealing with waves. The chance for error is unintentionally made obvious ;-)
Folks ought to know that when calibrating their probe(s), they should use a non-conductive screwdriver. It will make it easier to calibrate the probe(s). Also, once calibrated for a specific 'scope, the probe(s) shouldn't need to be re-calibrated as long as they are used with that specific 'scope. However, I _don't_ know how calibration is or is not affected by using a probe on different channels on that 'scope -- I'm obviously not an expert. ;)
Edit: When you were showing the trigger level control on your old Tektronix 'scope, was there a faint "dot" that you were watching move around on the signal trace? I didn't see one, but have seen similar "dots" on other channels' videos where they were using 'scopes. Their dots were very hard for me to see via UA-cam, so I'm guessing that your dot was simply too difficult for me to see.
This is a wonderful video! I can't wait for parts 4 & 5!
good point
Thanks you... My Grand Master telling me that it's taking life time practice to get perfect but you can't never reached Nirvana's...
At 26:25, should mention that the probe should be set to Times 10; unless the probe is strictly a Times 10 probe.
You didn't cover the Chop/Alt button.
True, missed the chop/alt.
Actually... 1 divided by 16.666 is 0.060002400096. Doh!
What we need to do, is keep in mind the time units! We divide 1 second by the time it takes to complete one cycle, which in this case is 16.666 milliseconds.
Hence, it's 1 second divided by 0.016666 (16.666 thousands of a second) - and that yields the desired 60Hz frequency (plus some negligible change).
Woot