Stayed up way later than I expected dinking around with my Tek 465b I just bought and testing different frequency measurements from my old elenco mx-9300 and my little PTL-1 from CIE. Your videos have been a great aid in learning and I know I have a long way to go but I'll get there eventually. Thanks for sharing so graciously with us, not only your knowledge but your time. I can't thank you enough. Be blessed.
How is the 465B working out for you and is it not too difficult to understand/learn?there is one for sale in my area and I might buy it. I could use it to trouble shoot some stereos that I have.Cheers/Rob
+Rob Hernandez The 465B has been working out just fine. Still works good and haven't had any problems with it. Not too difficult to work with I don't think. Everything has been pretty straight forward and they're built like tanks so you can't really go wrong with one. I would recommend it in a heartbeat.
Thank you very much Redemptus I think I am going to go for it. I have heard that the Tektronix brand is a good one. And I believe this model comes with a DMM built in? What can you use the DMM for?
Rob Hernandez The DM44 is an option for the scope so you'll find that not all of them have it. It allows you to measure DC voltage, resistance, temperature (with the temp probe, mine didn't come with the probe and it appears that Option 1 specifically excludes the probe to save on price,) as well as differential delay time (the time between any two points on the oscilloscope trace.) Honestly, I haven't used mine as it didn't have any probes though I think it can use standard 4mm banana plugs but don't quote me on that. Update: Couldn't leave well enough alone so I got some probes and sure enough it will take the standard unshrouded banana plugs. I'd have to read up on how to measure the delay between two points on the trace though as I'm not sure how that works yet. Guess I have to schedule some experimentation time soon. :)
Well that is good to know, I think one that is for sale in my area does not come with the DMM. I am sure that you eventually will figure it out, Good luck. Ah and good to know that you can use the banana plugs. Cheers
absolutely awesome educational video. Love the paper work - suddenly it seems to be so clear, when someone is able to teach me sophisticated things the easy way. I`m stunned :) Thank you.
Sir...you sure do explain your videos very well. You explain what's on your screen and even show what button or dial controls the function and why. The best videos on oscilloscope uses are done on this channel
Just got my first scope, to learn how to fix old arcade boards. This was a superb video, was able to check my crystal and clock to 12,400Mhz. Its known to be 12,000Mhz. Thank you, cant wait to watch the rest of your channel.!
good video - for educational purposes, some people might be wondering how the math works in the frequency hand calculation. it's important to use the raw units in the calculations. 1 / 12.5 is not 80 :) 1 / 0.0000125 seconds = 80,000 hz
One can read the very nice TEK manual and figure it out or one can watch these video's. I prefer the latter. Thank you for this outstanding presentation.
First, always measure to the center of the scope trace. Second, the oscillation divides 1 s of time into 'f' pieces (cycles) so that 'f' T=1 s. But we give the frequency units cycles/s=Hertz so that fT=1 instead. Period has units s/cycle so the units cancel. Usually, we write one of the equivalent expressions f=1/T or T=1/f. Third, the 1% scope calibration reflects our ability to locate the trace to about 0.1 divisions; 0.1 div / 10 div = 1% is the best measurement we can make anyway so it is pointless to spend more money on more precise components. Fourth, it is also valid to measure several periods and this strategy will always allow you to use more of the display for more precision; however, don't forget to divide your time measurement (or multiply your measured frequency) by the number of periods and be sure you count the number of cycles correctly.
Another great instructional video well presented, will try this to see how bad my cheap frequency counter is, bet the scope is more accurate, still working my way through. Phil
Very thankful for your sharing! Question: How would you measure the percent of modulation in a signal for radio alignment? Project requires 455kHz 400 kHz, modulation 80%. Can a circuit be built that will enable you to introduce the required percent of modulation into a signal? Thank You!
I used to have a Sencore autotracker but now I have an old Hitachi that I need to learn on....anyway great video I was able to follow along and understand everything you did.
Great video, can you show why you would need a freq gen and how to use in combination with a scope for trouble shooting or building an electronics project?
Another great video, even my wife who was in the room whilst I watched it at breakfast this morning commented how well you put the concepts across, and she has zero interest in such things :) Having just started in amateur radio here in the UK and passed the first two of three three stages to a full licence, I would love to see any applications of using the oscilloscope as an addendum to the hobby. I seem to recall you yourself have an interest? Thanks again, great presentation.
Thank you... Glad I could push this from 999 to 1K likes! A buddy loaned me his Tektronix 2235 Oscilloscope to use with my channel, and this quick demo was helpful.
Wow, immediate reply, thanks very much. I'll do the maths re using 1/4 watt resistors in parallel, as I don't have any 1/2 watt ones. Thanks very much.indeed. My newly acquired, but elderly Marconi Wattmeter has a function that may be similar, but I am unfamiliar. An insert probe knob, a small secondary "diode detector" meter, and a "mod out" jack socket. I suspect it may do part of what your circuit offers, but I'd rather have a standalone interface. Thanks again!
Thanks for the video. Quite enjoyed. Would you kindly make a video about frequency counters, please. I have a basic/digital counter but don't know where to plug in a transmitter to see broadcasting frequency live, or, in a receiver to see what frequency I am on. Thanks a bunch.
Most transmitters and receivers use a superheterodyne architecture. Thus, the operating frequency is controlled by a Local Oscillator (LO). It is most common to attach the Frequency Counter to the LO output, and then apply a frequency offset in the counter to correct for the IF frequency.
Thanks, this has been helpful. I had an intro to the use of scopes in high school. That was roughly 45 years ago and I did not learn it well. Louis/w0it
Really liked the video helped a lot-,as I am self taught and a friend of mine was nice enough to give me a older scope that I have no idea how to use until now that is(at least its a place to start) more " Back to basics" as in what are the rest of the switches and knobs are for? do? on the oscilloscope would defiantly be to my liking : ) Thanks I will keep looking to see what other good videos you may have on the scope set up
do 30 year old Digital Scopes Exist ? i wouldn't have thought so if they do , then it must have been right at the beginning of their introduction I have 2 C.R.O.'s 1 is from the the early 60's i think the brand was BCD and the other is a KIKUSUI CRO from the 80's, 84 i think then i have a Rigol Digital Scope as well DS2000A Series i do prefer my old CRO's though
When an audio amplifier has an oscillation problem that is causing oscillation in the amplifier circuit somewhere. I have seen repair technicians set the Oscope to a very slow sweep on the timebase so that you the trace as a moving dot. The moving dot will move up and down at random from the oscillation issue in the amplifier circuit. What I'm confused about is why are the repair techs setting the Oscope to a very slow sweep time base which is ment to measure and display very low frequencies and the oscillation frequency is audible. Since the oscillation is audible I would think of setting the Oscope timebase to a fast sweep setting but then you won't see the oscillation because the Oscope is just display a straight flat line even when the oscillation is not a low frequency and it Audible hearing the oscillation coming out of the speaker.
W2aew, I connect a +9vdc to the oscillscope channel#1 and connected a lab test function set at 1Khz sinewaveform frequency to the "External trigger" input and set the Oscope trigger Mode to external. Why isn't the Oscope displaying and drawing a 1Khz sinewaveform frequency on the Screen?
That's not how an oscilloscope works. The scope displays what is connected to the vertical channel input(s). So, in your case, it is displaying a flat line that represents the 9Vdc that you connected to it. Instead, connect your 1kHz signal to channel 1 and change the trigger source to channel 1, and you'll see your signal generator's output.
I wish you had covered how to trigger on the delayed sweep. I'm looking at a 50Hz square wave (generated from 50Hz mains), which looks really clean - until I expand the transitions, which show HF ringing. Half way across the screen, however, there's a bit of jitter, so simply expanding the waveform isn't enough to see the ringing. I need to stabilise it. I have a 2465, but this is the first time in 20 years that I've had it out, and I can't remember how to use it properly. It had taken up smoking in the interim, so I had to replace all its PSU capacitors first.
I've got a couple of videos on using the delayed sweep, and the triggering on that: ruclips.net/video/J-7MycqHPOs/видео.html ruclips.net/video/vvqVTD-VEow/видео.html ruclips.net/video/0enuruGWYk8/видео.html
So forgive me if this is a stupid question New to scopes but this seems like you could check to see if your scope was out of calibration or not?... of course depending on your sig generator and frequency counter is in calibration.Jim
Is it possible to setup an old analog scope to display/plot the RMS of an AC signal? Like what happens when you zoom out of a DC signal and see it plot over a long period of time. It would be similar to how these newer bench DMMs are graphing the fluctuation of a DC signal or RMS of an AC signal. I have a old Tek 5540 scope and a digital Rigol scope where I'd love to figure this out instead of buying a new bench DMM.
Are you sure about that Tek scope number? I don't recognize that as an old Tek analog scope. I know there was a 5440 scope (analog scope with 3 plug-in slots). The digital scope will usually have an RMS measurement as part of their automatic measurement system. An analog scope can not show you the RMS value as a trace directly.
@@w2aew The Tek 5440 is aka (5403/D40). My digital scope with state the RMS figure but won't plot it. Does Tek's new digital scope plot the calculated RMS?
HI great lesson..,whats the exact make of this particular oscillascope ? : ) i want to measure different frequency reactions of hydrogen dry cell performance for optimum efficiencies ,..cells are running at about 13.8 volts ..2 v's between each electrolytic plate ,do you think this would be a good tool for this..? many thanks : )
Hi Alan What is your opinion of this scope. I have an opportunity to pick one up for about $300 on ebay. Nothing much in description other than comes from a work environment and works. No probes included. Thx
Hello, I own a Leader LBO-526 scope. It also has Delay time , A and B TIME/DIV and DELAY TIME. The coupling has: AC, HF-REJ, TV-V AND TV-H. The source has: ALT, CH-1, CH-2, LINE AND EXT. Can you explain what these are and would I ever use these functions. Thank you.....
I have videos on these topics. They show the features on a Tektronix scope, but the operation would likely be similar on your scope. The Delay Time, A and B Time/Div settings all refer to a dual, delaying timebase. This is how you "zoom" on a portion of a waveform with an analog scope. Here are 4 videos on the topic: ruclips.net/video/54roz8IUoVI/видео.html ruclips.net/video/J-7MycqHPOs/видео.html ruclips.net/video/0enuruGWYk8/видео.html ruclips.net/video/vvqVTD-VEow/видео.html The coupling controls to listed (AC, HF-REJ, TV-V, TV-H) and the Source controls (ALT, CH1, CH2, Line, EXT) all refer to the Trigger operation. I have several videos on these. I don't cover TV-V or TV-H though. These two settings allow you to trigger on vertical sync or horizontal sync signal on TV composite video signal. If you never work on a TV, you'll never need these trigger settings. AC coupling means that the signal going to the trigger circuit will be AC coupled. HF-REJ will filter away any high frequency noise on the trigger signal. Here are some videos on Trigger controls: ruclips.net/video/OFGm-Pel4Hg/видео.html ruclips.net/video/BKjJK1rsZmM/видео.html
How is it that the face of your 465B Scope looks very brand new, isn't that an old brand of a scope? Did you Buy the scope re manufactured or refurbished from a used dealer?
hi.. i need to ask you something please.. how to measure the audio signal waveform? in addition to this signal. how to measure the audio frequency that is coming out from the power amp? the signal varies when playing music. how to capture the exact frequency on the scope? can you do a video on the scope PLEASE.
An audio waveform, just a music, doesn't contain just one frequency - it contains an entire range of frequencies. In order to determine the frequency content you'd need a spectrum analyzer or use the FFT function of a modern digital oscilloscope.
Hello. Very Nice vídeo. Can you teste a situation of Hight Frequency Transient with one of your less espensive oscilloscope? Like a mini-motor conect to the eletricity home net. I'm a geobiologiste and the so call "durty eletricity" it's an important matter of safety at home. I'm from Portugal and I'm already a fun. Thank you very much!!!
i have a question that came in my test. i am not able to solve it. please help. Q.the linear sweep for time base has deviation from its nominal waveform( triangular)NW:+ve slope ends at T, -ve slope ends at 1.15T Actual waveform:+ve slope ends at 1.1T, -ve slope ends at 1.3T. a 5V p-p sine wave with freq of 1KHZ will be measured on the oscilloscope as a sine wave with _______V and ______KHZ frequency. pls pls help.
George, using multiple cycles really won't buy you much. Consider that on an analog scope, you can probably estimate the x-axis crossing point to within about 5% of a division. When you slow the timebase down to put more cycles on the screen, that 5% of a division will larger (in absolute time) as well. This error gets divided by the number of cycles, but the end result is that the error is about the same as using the same number of divisions to measure one cycle. The best way to minimize errors is to use as many divisions as possible to make the measurement, regardless of how many cycles are included. Also keep in mind that typical analog scopes will have a timebase accuracy of 3-5%, and that sometime this spec excludes the far left and right divisions due to sweep non-linearities.
LOL.... What EXACTLY is it that you want to learn my friend ? Perhaps i can put you on the right path. but first i need to know where you're coming from Do you just like Oscilloscopes or do you actually want to learn Electrical and Electronics Engineering or, Do you just prefer to be an Electronics Hobbyist or... did you have something else in mind Because when you say something like.... I WANT TO LEARN EVERYTHING you first need to know what he knows before you can know that you want learn everything then.... Even once you know what he knows i'ts a long hard road to learning everything he knows i mean.. you can't seriously expect him to put around 5 years of effort into you to teach him everything so... to make the decision easier and more structures WHAT EXACTLY ARE YOU EXCITED ABOUT and i'll see if i can help you
Hello im a beginner at all this oscilloscope stupid question. Im tinkering around with car audio amplifiers do i need a function generator or can i use a pulse generator? And how do i hook them up to my oscilloscope ? When my uncle passed he left me his tekronix 5110 oscilloscope and he was starting to teach me but we didnt make it that far plz help
how are you converting microseconds to hertz, pretty baffled about this part, 1/12.5=0.08 then is it times 1000 to get hz? i found converter so figured it eventually 😁👍🇬🇧
good afternoon .. and happy new year 2022 ... I have a tektronix 7L12 and it has a quadruple orational integrated IC is Tek 155 0035 00 it is in circuit as U820 vertical output .. if you can help me to repair this instrument ... there is a replacement for IC U820 ??? greetings from Argentin
This is a custom IC that was designed and fabricated at Tektronix, there is no commercial replacement for it. The design of the chip is quite simple, and might be able to be replicated discretely, or it's function could be duplicated with a modern quad op amp (provided the application doesn't also need to control the BIAS node (pin 12). Here is the basic design information for this chip: w140.com/tekwiki/images/0/0d/Tek_m053.pdf Looks like someone on the TekScope group did make a descrete replacement: groups.io/g/TekScopes/album?id=28989
A scope isn't the best tool for measuring RF frequency - typically not very accurate, only good to a few percent. However, it can be done. Do NOT connect the transmitter directly to the scope! The scope input's 50 ohm termination (if it has one) is typically rated to a few hundred milliwatts at best. If you want to couple the transmitted signal to the scope, you're better off using an RF Sampler/Tap, or even an antenna in the proximity of the transmitted signal.
thanks mate, yeah kind of knew i couldn't connect directly but was unsure how, all my scopes inputs are 1Mohm 20 picofarrad . what about looking at a 240v AC sine wave ? ( or rather 12v for safety) how would i so that ? cheers :)
You're probably better off going with a spectrum analzyer. signals directly from radio are not like a raw sine wave First of all they will have modulation and that right there is opening a can of worms so to speak simple answer... Get a spectrum analzyer or an MSO
Sorry, how dense of me, of course you are a "Ham", what I think I meant was I wondered if you were still active in that field, apologies :) Watched the vid, ordered the germanium diodes, and now wondering what value 1/2 Watt resistor to use for a max of 100 watts RF input? Can you suggest a value, or can i use a pot? Thanks!
how do you set an analog oscilloscope to display the input signal to view the frequency sweep in a logarithmic display so each graticules are to a logarithmic scale ? because I think analog oscilloscopes display the signal as a Linear scale not log?
yes you set your function generator/audio generator to LOG sweep. The Oscope has 8 boxes divisions. How do you set up the Oscope so each box division is a Decade so its 1,10,100,1000,10000 etc. Does the function generators sweep time setting have to be the SAME sweet time setting as the Oscope time base setting?
@@waynegram8907 Most oscilloscopes have 10 divisions horizontally. If you can get a log sweep from your function generator, then set your scope's horizontal sweep time to 1/10th of the generator's sweep time (so that the total sweep time is the same). Remember that the scope's sweep time is time/division, and with 10 divisions horizontally, you'll have the same total sweep time.
thanks for the help, can you please give an example of the generators sweep time setting the setting the Oscopes timebase sweep time to 1/10th? what formula calculation did you do to get the sweep times to work together for log sweeps? I enter in my calculate the generators sweep time and then "divide it by 10" to get that Oscopes timebase sweep time?
Any idea how to stabilize a low frequency (10Hz) square wave on an analog O'scope. Im using a Tek 2465 scope and trying to look at PWM waveforms for a stepper motor. Its in the 10Hz range and I can't seem to stabilize my waveform on the scope with such a low frequency. Any tips, tricks or suggestions?
Thanks for the reply. Yes, I tried those setting, but could not get a stable waveform. Is the sweep setting a parameter that I could check in a specs of a scope. i.e if I am getting a dig scope, is there some min value I should check in the spec to make sure the sweep speed is low enough to get a stable 10Hz waveform display?
Was it not stable, or just not a continuous picture. WIth an analog scope running at such a slow sweep speed, it is impossible to get a continuous waveform unless the scope has a persistence type display. Just about any digital scope will show you a good waveform.
It was definitely not continuos (so the rise and fall of the signal could not be seen) but the levels (H and L) were also flickering on the screen (not sure if this has anything to do with my HOLD OFF setting)?
Probably not. For a 10Hz signal, the period is 100ms, which means that the horizontal timebase setting needs to be set to 10ms/div or higher, in order to see one cycle. Slower settings (like 20ms/div) will show you more cycles. Trigger holdoff should be set to min. Trigger mode set to Normal (not Auto). Trigger coupling to DC, and level set midway between the high and low values. It WILL still flicker because the sweep speed is slow - totally normal, and as good as you can get, but you should be able to see both high and low levels on a single sweep. The rise and fall times might be too fast to "see" at this low sweep speed, so it will just look like horizontal line segments.
So I'm counting 5.4 Divs @ .2ms/Div from rising edge to rising edge. 5.4 x .2 = 1.08ms per cycle. 1.08/1000 = .00108 seconds per cycle 1/.00108 = 925 Hz? I've got my function generator set around 10K. What am I doing wrong?
Sounds like you have a 10x magnifier turned on on the horizontal. My earlier comments about 1x/10x was referring to probes, since many scopes don't have the Horizontal zoom. Turn the 10x zoom off, or calculate using 0.2ms/div divided by 10.
I looked around ebay for a scope, I think the Tektronix is too expensive, even for a used one. I found an old Hitachi for $12.00. they are very good quality.
If one probes a signal of 300 MHz on an Oscilloscope (analog) with 50 MHz bandwidth, we might still see the waveform, isn't it ? It's just that it would be highly dim.
+analogy ? The "dimness" will be a function of the sweep speed. The 300MHz signal will be greatly attenuated, and probably not stable (because the trigger circuit will probably be unable to trigger on it).
You would have to measure a signal of a known amplitude and known frequency to check the calibration. They are often very close anyway, they don't drift much. Also, many times you're just checking to see if a waveform has the right shape (not distorted, etc.), so a perfect calibration is often not really required for hobby or repair work.
Stayed up way later than I expected dinking around with my Tek 465b I just bought and testing different frequency measurements from my old elenco mx-9300 and my little PTL-1 from CIE. Your videos have been a great aid in learning and I know I have a long way to go but I'll get there eventually. Thanks for sharing so graciously with us, not only your knowledge but your time. I can't thank you enough. Be blessed.
How is the 465B working out for you and is it not too difficult to understand/learn?there is one for sale in my area and I might buy it. I could use it to trouble shoot some stereos that I have.Cheers/Rob
+Rob Hernandez The 465B has been working out just fine. Still works good and haven't had any problems with it. Not too difficult to work with I don't think. Everything has been pretty straight forward and they're built like tanks so you can't really go wrong with one. I would recommend it in a heartbeat.
Thank you very much Redemptus I think I am going to go for it. I have heard that the Tektronix brand is a good one. And I believe this model comes with a DMM built in?
What can you use the DMM for?
Rob Hernandez The DM44 is an option for the scope so you'll find that not all of them have it. It allows you to measure DC voltage, resistance, temperature (with the temp probe, mine didn't come with the probe and it appears that Option 1 specifically excludes the probe to save on price,) as well as differential delay time (the time between any two points on the oscilloscope trace.) Honestly, I haven't used mine as it didn't have any probes though I think it can use standard 4mm banana plugs but don't quote me on that. Update: Couldn't leave well enough alone so I got some probes and sure enough it will take the standard unshrouded banana plugs. I'd have to read up on how to measure the delay between two points on the trace though as I'm not sure how that works yet. Guess I have to schedule some experimentation time soon. :)
Well that is good to know, I think one that is for sale in my area does not come with the DMM.
I am sure that you eventually will figure it out,
Good luck. Ah and good to know that you can use the banana plugs.
Cheers
absolutely awesome educational video. Love the paper work - suddenly it seems to be so clear, when someone is able to teach me sophisticated things the easy way. I`m stunned :) Thank you.
I hope you like the rest of my videos just as much!
Sir...you sure do explain your videos very well. You explain what's on your screen and even show what button or dial controls the function and why. The best videos on oscilloscope uses are done on this channel
Just got my first scope, to learn how to fix old arcade boards. This was a superb video, was able to check my crystal and clock to 12,400Mhz. Its known to be 12,000Mhz. Thank you, cant wait to watch the rest of your channel.!
good video - for educational purposes, some people might be wondering how the math works in the frequency hand calculation. it's important to use the raw units in the calculations. 1 / 12.5 is not 80 :)
1 / 0.0000125 seconds = 80,000 hz
Great little video. I figured it on my own, but I'm glad to know I didn't miss anything important!
Funny how I knew how to do this already, but just watched because I enjoy how you explain things.
I’m taking DCAC and watching this helps so much with the AC part!
brilliant, thanks for this. I am an audio (synthesizer) guy and I found this very helpful for calibrating my modules.
Thank You very much!
Something that I forgot how to do over the decades.
Now I'll try doing the same on my TAS 465.
73s
Tom
More back to basics videos please.Great video very informative and interesting.Cheers
Love your videos. Becoming oscilloscope guru one w2aew video at a time :)
Clear and precise instruction. I'm just learning how to use a scope. Your help is is invaluable. Thanks.pauld
That was a nice video. You delineated quite well ! 73's Gary Grove
Just what I needed at the moment I needed it. Thanks so much. Happy Holidays, I recommend your channel to many.
One can read the very nice TEK manual and figure it out or one can watch these video's. I prefer the latter. Thank you for this outstanding presentation.
A brilliant tutorial by the way I love your scope take care Rob
First, always measure to the center of the scope trace. Second, the oscillation divides 1 s of time into 'f' pieces (cycles) so that 'f' T=1 s. But we give the frequency units cycles/s=Hertz so that fT=1 instead. Period has units s/cycle so the units cancel. Usually, we write one of the equivalent expressions f=1/T or T=1/f. Third, the 1% scope calibration reflects our ability to locate the trace to about 0.1 divisions; 0.1 div / 10 div = 1% is the best measurement we can make anyway so it is pointless to spend more money on more precise components. Fourth, it is also valid to measure several periods and this strategy will always allow you to use more of the display for more precision; however, don't forget to divide your time measurement (or multiply your measured frequency) by the number of periods and be sure you count the number of cycles correctly.
I see you have the same rig as me! TS-830. I'll NEVER sell it.
Fantastic radio and one that I can actually fix!
Thank you for this great tutorial. Very informative and easy to understand. It has helped me immensely.
Another great instructional video well presented, will try this to see how bad my cheap frequency counter is, bet the scope is more accurate, still working my way through.
Phil
Thank you very much Sir for this easy to understand and very helpful tutorial.
Very thankful for your sharing! Question: How would you measure the percent of modulation in a signal for radio alignment? Project requires 455kHz 400 kHz, modulation 80%. Can a circuit be built that will enable you to introduce the required percent of modulation into a signal? Thank You!
I used to have a Sencore autotracker but now I have an old Hitachi that I need to learn on....anyway great video I was able to follow along and understand everything you did.
thank you so much. I was so confused now I'll Ace my oscilloscope performance test
Great video, can you show why you would need a freq gen and how to use in combination with a scope for trouble shooting or building an electronics project?
Another great video, even my wife who was in the room whilst I watched it at breakfast this morning commented how well you put the concepts across, and she has zero interest in such things :) Having just started in amateur radio here in the UK and passed the first two of three three stages to a full licence, I would love to see any applications of using the oscilloscope as an addendum to the hobby. I seem to recall you yourself have an interest? Thanks again, great presentation.
Thank you... Glad I could push this from 999 to 1K likes! A buddy loaned me his Tektronix 2235 Oscilloscope to use with my channel, and this quick demo was helpful.
Wow, immediate reply, thanks very much. I'll do the maths re using 1/4 watt resistors in parallel, as I don't have any 1/2 watt ones. Thanks very much.indeed. My newly acquired, but elderly Marconi Wattmeter has a function that may be similar, but I am unfamiliar. An insert probe knob, a small secondary "diode detector" meter, and a "mod out" jack socket. I suspect it may do part of what your circuit offers, but I'd rather have a standalone interface. Thanks again!
I wish I could find a 485 as clean as yours. WOW!
Maths Q : What figure calculation did you do to get the 80Khz ....I understand the formula...but, my maths is useless. :) Love all these videos btw.
1 divided by 12.5us = 80,000, or 80kHz.
Nice lab setup you have
Thanks for the video. Quite enjoyed. Would you kindly make a video about frequency counters, please. I have a basic/digital counter but don't know where to plug in a transmitter to see broadcasting frequency live, or, in a receiver to see what frequency I am on. Thanks a bunch.
Most transmitters and receivers use a superheterodyne architecture. Thus, the operating frequency is controlled by a Local Oscillator (LO). It is most common to attach the Frequency Counter to the LO output, and then apply a frequency offset in the counter to correct for the IF frequency.
@@w2aew Much appreciated the comment.
Thanks, this has been helpful. I had an intro to the use of scopes in high school. That was roughly 45 years ago and I did not learn it well. Louis/w0it
Excellent video. Thanks
Nicely done! Thank you for posting this.
Thanks!! Another Enjoyable and Easy to understand.Video,,,,,,,.Great for Beginner and Expert Alike!!! Thank you from MR.OHM!!!
Really liked the video helped a lot-,as I am self taught and a friend of mine was nice enough to give me a older scope that I have no idea how to use until now that is(at least its a place to start) more " Back to basics" as in what are the rest of the switches and knobs are for? do? on the oscilloscope would defiantly be to my liking : ) Thanks I will keep looking to see what other good videos you may have on the scope set up
There are a lot - some on the vertical controls, some on the triggering controls, and a lot on just basic usage...
Learned a lot. Thank you and now subscribed.
Thanks for the simple instructions, getting rusty about it...
Awesome video, keep up the good work!
better than expected.
I've got two 30+ year old analogues and a digital - thank god for cursors for reducing the curses.
do 30 year old Digital Scopes Exist ?
i wouldn't have thought so
if they do , then it must have been right at the beginning of their introduction
I have 2 C.R.O.'s
1 is from the the early 60's i think the brand was BCD
and the other is a KIKUSUI CRO from the 80's, 84 i think
then i have a Rigol Digital Scope as well DS2000A Series
i do prefer my old CRO's though
Great video a easy to understand even for a novice. Keep them coming.
When an audio amplifier has an oscillation problem that is causing oscillation in the amplifier circuit somewhere. I have seen repair technicians set the Oscope to a very slow sweep on the timebase so that you the trace as a moving dot. The moving dot will move up and down at random from the oscillation issue in the amplifier circuit. What I'm confused about is why are the repair techs setting the Oscope to a very slow sweep time base which is ment to measure and display very low frequencies and the oscillation frequency is audible. Since the oscillation is audible I would think of setting the Oscope timebase to a fast sweep setting but then you won't see the oscillation because the Oscope is just display a straight flat line even when the oscillation is not a low frequency and it Audible hearing the oscillation coming out of the speaker.
Very interesting video. I have a 475 and this helped me a lot. Thanks
Excellent Tutorial! As a novice, I Thank You
!
Great video!
Thank you for sharing...
:-)
no surprise im subscribed already.. 😁👍 thanks yet again
W2aew, I connect a +9vdc to the oscillscope channel#1 and connected a lab test function set at 1Khz sinewaveform frequency to the "External trigger" input and set the Oscope trigger Mode to external. Why isn't the Oscope displaying and drawing a 1Khz sinewaveform frequency on the Screen?
That's not how an oscilloscope works. The scope displays what is connected to the vertical channel input(s). So, in your case, it is displaying a flat line that represents the 9Vdc that you connected to it. Instead, connect your 1kHz signal to channel 1 and change the trigger source to channel 1, and you'll see your signal generator's output.
I wish you had covered how to trigger on the delayed sweep. I'm looking at a 50Hz square wave (generated from 50Hz mains), which looks really clean - until I expand the transitions, which show HF ringing. Half way across the screen, however, there's a bit of jitter, so simply expanding the waveform isn't enough to see the ringing. I need to stabilise it. I have a 2465, but this is the first time in 20 years that I've had it out, and I can't remember how to use it properly. It had taken up smoking in the interim, so I had to replace all its PSU capacitors first.
I've got a couple of videos on using the delayed sweep, and the triggering on that:
ruclips.net/video/J-7MycqHPOs/видео.html
ruclips.net/video/vvqVTD-VEow/видео.html
ruclips.net/video/0enuruGWYk8/видео.html
Thanks so much for sharing the info with us, it was very helpful; Jesus Christ Bless you! :)
Thank you, and He already has!
Good stuff !
So forgive me if this is a stupid question New to scopes but this seems like you could check to see if your scope was out of calibration or not?... of course depending on your sig generator and frequency counter is in calibration.Jim
Sure, if you have a "known" frequency source, you can use that to check the horizontal calibration of your scope.
Thank you, very helpful!
Excellent video and channel. Thank you sir :)
There is one at the price range you mentioned but it is a 465 Tektronix and not 465B. What do you think of that?
Thx again
Is it possible to setup an old analog scope to display/plot the RMS of an AC signal? Like what happens when you zoom out of a DC signal and see it plot over a long period of time. It would be similar to how these newer bench DMMs are graphing the fluctuation of a DC signal or RMS of an AC signal. I have a old Tek 5540 scope and a digital Rigol scope where I'd love to figure this out instead of buying a new bench DMM.
Are you sure about that Tek scope number? I don't recognize that as an old Tek analog scope. I know there was a 5440 scope (analog scope with 3 plug-in slots). The digital scope will usually have an RMS measurement as part of their automatic measurement system. An analog scope can not show you the RMS value as a trace directly.
@@w2aew The Tek 5440 is aka (5403/D40). My digital scope with state the RMS figure but won't plot it. Does Tek's new digital scope plot the calculated RMS?
@@rpbale Newer scopes can plot measurement trends
Considering you guessed at 6.25, you came dang close.
Thanks for sharing!
HI great lesson..,whats the exact make of this particular oscillascope ? : ) i want to measure different frequency reactions of hydrogen dry cell performance for optimum efficiencies ,..cells are running at about 13.8 volts ..2 v's between each electrolytic plate ,do you think this would be a good tool for this..? many thanks : )
Great information. Thank you.
great video!
Hi Alan
What is your opinion of this scope. I have an opportunity to pick one up for about $300 on ebay. Nothing much in description other than comes from a work environment and works. No probes included.
Thx
thank you for this video, it's very explicit!
Hello, I own a Leader LBO-526 scope. It also has Delay time , A and B TIME/DIV and DELAY TIME.
The coupling has: AC, HF-REJ, TV-V AND TV-H. The source has: ALT, CH-1, CH-2, LINE AND EXT.
Can you explain what these are and would I ever use these functions.
Thank you.....
I have videos on these topics. They show the features on a Tektronix scope, but the operation would likely be similar on your scope. The Delay Time, A and B Time/Div settings all refer to a dual, delaying timebase. This is how you "zoom" on a portion of a waveform with an analog scope. Here are 4 videos on the topic:
ruclips.net/video/54roz8IUoVI/видео.html
ruclips.net/video/J-7MycqHPOs/видео.html
ruclips.net/video/0enuruGWYk8/видео.html
ruclips.net/video/vvqVTD-VEow/видео.html
The coupling controls to listed (AC, HF-REJ, TV-V, TV-H) and the Source controls (ALT, CH1, CH2, Line, EXT) all refer to the Trigger operation. I have several videos on these. I don't cover TV-V or TV-H though. These two settings allow you to trigger on vertical sync or horizontal sync signal on TV composite video signal. If you never work on a TV, you'll never need these trigger settings. AC coupling means that the signal going to the trigger circuit will be AC coupled. HF-REJ will filter away any high frequency noise on the trigger signal. Here are some videos on Trigger controls:
ruclips.net/video/OFGm-Pel4Hg/видео.html
ruclips.net/video/BKjJK1rsZmM/видео.html
How is it that the face of your 465B Scope looks very brand new, isn't that an old brand of a scope? Did you Buy the scope re manufactured or refurbished from a used dealer?
hi.. i need to ask you something please..
how to measure the audio signal waveform? in addition to this signal. how to measure the audio frequency that is coming out from the power amp? the signal varies when playing music. how to capture the exact frequency on the scope? can you do a video on the scope
PLEASE.
An audio waveform, just a music, doesn't contain just one frequency - it contains an entire range of frequencies. In order to determine the frequency content you'd need a spectrum analyzer or use the FFT function of a modern digital oscilloscope.
Hello. Very Nice vídeo. Can you teste a situation of Hight Frequency Transient with one of your less espensive oscilloscope? Like a mini-motor conect to the eletricity home net.
I'm a geobiologiste and the so call "durty eletricity" it's an important matter of safety at home. I'm from Portugal and I'm already a fun. Thank you very much!!!
i have a question that came in my test. i am not able to solve it. please help. Q.the linear sweep for time base has deviation from its nominal waveform( triangular)NW:+ve slope ends at T, -ve slope ends at 1.15T
Actual waveform:+ve slope ends at 1.1T, -ve slope ends at 1.3T.
a 5V p-p sine wave with freq of 1KHZ will be measured on the oscilloscope as a sine wave with _______V and ______KHZ frequency. pls pls help.
I'd have to argue that you could get a more accurate estimation by counting multiple cycles, rather than just one.
George, using multiple cycles really won't buy you much. Consider that on an analog scope, you can probably estimate the x-axis crossing point to within about 5% of a division. When you slow the timebase down to put more cycles on the screen, that 5% of a division will larger (in absolute time) as well. This error gets divided by the number of cycles, but the end result is that the error is about the same as using the same number of divisions to measure one cycle. The best way to minimize errors is to use as many divisions as possible to make the measurement, regardless of how many cycles are included. Also keep in mind that typical analog scopes will have a timebase accuracy of 3-5%, and that sometime this spec excludes the far left and right divisions due to sweep non-linearities.
Thank you! That's a great answer.
Man, I love your videos. I want to learn everything from you. I can clean toilette for you or whatever, as long as you teach me :)
LOL....
What EXACTLY is it that you want to learn my friend ?
Perhaps i can put you on the right path.
but first i need to know where you're coming from
Do you just like Oscilloscopes
or do you actually want to learn Electrical and Electronics Engineering
or, Do you just prefer to be an Electronics Hobbyist
or... did you have something else in mind
Because when you say something like....
I WANT TO LEARN EVERYTHING
you first need to know what he knows before you can know that you want learn everything
then....
Even once you know what he knows
i'ts a long hard road to learning everything he knows
i mean.. you can't seriously expect him to put around 5 years of effort into you to teach him everything
so... to make the decision easier and more structures
WHAT EXACTLY ARE YOU EXCITED ABOUT
and i'll see if i can help you
Hello im a beginner at all this oscilloscope stupid question. Im tinkering around with car audio amplifiers do i need a function generator or can i use a pulse generator? And how do i hook them up to my oscilloscope ? When my uncle passed he left me his tekronix 5110 oscilloscope and he was starting to teach me but we didnt make it that far plz help
Generally you'd be better off with a function generator. It would be difficult to observe distortion in an amplifier if you used a pulse generator.
@@w2aew ty i really apperciate it i been looking for a answer for a month thanks alot...
how are you converting microseconds to hertz, pretty baffled about this part, 1/12.5=0.08 then is it times 1000 to get hz? i found converter so figured it eventually 😁👍🇬🇧
12.5us is equal to 0.0000125 seconds. 1/0.0000125 equals 80,000Hz, or 80kHz.
I see now, i was being daft and mixing hz with khz.. Thanks for helping with my 'new' old scope😁
It is grate, more videos Please
You could even go steeper on the amplitude even if the peaks go off screen
good afternoon .. and happy new year 2022 ... I have a tektronix 7L12 and it has a quadruple orational integrated IC is Tek 155 0035 00 it is in circuit as U820 vertical output .. if you can help me to repair this instrument ... there is a replacement for IC U820 ??? greetings from Argentin
This is a custom IC that was designed and fabricated at Tektronix, there is no commercial replacement for it. The design of the chip is quite simple, and might be able to be replicated discretely, or it's function could be duplicated with a modern quad op amp (provided the application doesn't also need to control the BIAS node (pin 12). Here is the basic design information for this chip: w140.com/tekwiki/images/0/0d/Tek_m053.pdf
Looks like someone on the TekScope group did make a descrete replacement: groups.io/g/TekScopes/album?id=28989
useful video .. how do i measure a frequently direct from radio with an oscilloscope ?
what power can they handle ?
ta
A scope isn't the best tool for measuring RF frequency - typically not very accurate, only good to a few percent. However, it can be done. Do NOT connect the transmitter directly to the scope! The scope input's 50 ohm termination (if it has one) is typically rated to a few hundred milliwatts at best. If you want to couple the transmitted signal to the scope, you're better off using an RF Sampler/Tap, or even an antenna in the proximity of the transmitted signal.
thanks mate, yeah kind of knew i couldn't connect directly but was unsure how, all my scopes inputs are 1Mohm 20 picofarrad .
what about looking at a 240v AC sine wave ? ( or rather 12v for safety) how would i so that ?
cheers :)
You're probably better off going with a spectrum analzyer.
signals directly from radio are not like a raw sine wave
First of all they will have modulation and that right there is opening a can of worms so to speak
simple answer...
Get a spectrum analzyer or an MSO
Can I measure the readings of the legs of TTL chips with an analog oscillisope?
WIth a decent 10x probe, sure you can.
@@w2aew i have a tenma 72-3055...i do not know how to use it..its my first scope..i want to use to work on vintage arcade games pcbs.
@@markherring3513 You may want to review many of the videos I have in this playlist to learn how to use your scope.
ruclips.net/p/PL746BF38BC2E068E0
Sorry, how dense of me, of course you are a "Ham", what I think I meant was I wondered if you were still active in that field, apologies :) Watched the vid, ordered the germanium diodes, and now wondering what value 1/2 Watt resistor to use for a max of 100 watts RF input? Can you suggest a value, or can i use a pot? Thanks!
Could you please write out the formula to get the results: 1/12.5ms = 80Khz, please!
how do you set an analog oscilloscope to display the input signal to view the frequency sweep in a logarithmic display so each graticules are to a logarithmic scale ? because I think analog oscilloscopes display the signal as a Linear scale not log?
You would have to have a log waveform that corresponds to the frequency sweep as use this as the X input.
yes you set your function generator/audio generator to LOG sweep. The Oscope has 8 boxes divisions. How do you set up the Oscope so each box division is a Decade so its 1,10,100,1000,10000 etc. Does the function generators sweep time setting have to be the SAME sweet time setting as the Oscope time base setting?
@@waynegram8907 Most oscilloscopes have 10 divisions horizontally. If you can get a log sweep from your function generator, then set your scope's horizontal sweep time to 1/10th of the generator's sweep time (so that the total sweep time is the same). Remember that the scope's sweep time is time/division, and with 10 divisions horizontally, you'll have the same total sweep time.
thanks for the help, can you please give an example of the generators sweep time setting the setting the Oscopes timebase sweep time to 1/10th? what formula calculation did you do to get the sweep times to work together for log sweeps? I enter in my calculate the generators sweep time and then "divide it by 10" to get that Oscopes timebase sweep time?
@@waynegram8907 If you set your function generator sweep time to 100ms, then set your scope to 10ms/div.
Any idea how to stabilize a low frequency (10Hz) square wave on an analog O'scope. Im using a Tek 2465 scope and trying to look at PWM waveforms for a stepper motor. Its in the 10Hz range and I can't seem to stabilize my waveform on the scope with such a low frequency. Any tips, tricks or suggestions?
Make sure your trigger setting it set to NORMAL, not AUTO. 10Hz is difficult on an analog scope due to the slow sweep speed needed.
Thanks for the reply. Yes, I tried those setting, but could not get a stable waveform. Is the sweep setting a parameter that I could check in a specs of a scope. i.e if I am getting a dig scope, is there some min value I should check in the spec to make sure the sweep speed is low enough to get a stable 10Hz waveform display?
Was it not stable, or just not a continuous picture. WIth an analog scope running at such a slow sweep speed, it is impossible to get a continuous waveform unless the scope has a persistence type display. Just about any digital scope will show you a good waveform.
It was definitely not continuos (so the rise and fall of the signal could not be seen) but the levels (H and L) were also flickering on the screen (not sure if this has anything to do with my HOLD OFF setting)?
Probably not. For a 10Hz signal, the period is 100ms, which means that the horizontal timebase setting needs to be set to 10ms/div or higher, in order to see one cycle. Slower settings (like 20ms/div) will show you more cycles. Trigger holdoff should be set to min. Trigger mode set to Normal (not Auto). Trigger coupling to DC, and level set midway between the high and low values. It WILL still flicker because the sweep speed is slow - totally normal, and as good as you can get, but you should be able to see both high and low levels on a single sweep. The rise and fall times might be too fast to "see" at this low sweep speed, so it will just look like horizontal line segments.
So I'm counting 5.4 Divs @ .2ms/Div from rising edge to rising edge.
5.4 x .2 = 1.08ms per cycle.
1.08/1000 = .00108 seconds per cycle
1/.00108 = 925 Hz?
I've got my function generator set around 10K.
What am I doing wrong?
Sounds like you have a 10x magnifier turned on on the horizontal. My earlier comments about 1x/10x was referring to probes, since many scopes don't have the Horizontal zoom. Turn the 10x zoom off, or calculate using 0.2ms/div divided by 10.
I looked around ebay for a scope, I think the Tektronix is too expensive, even for a used one. I found an old Hitachi for $12.00. they are very good quality.
Thanks for this nice video!!!!!
Now i finaly know, how to calculate frequency. :)
So do I need to be concerned if my probe is set on 1x or 10x on how I do the math?
No - the 1x or 10x probes only affect the vertical scaling, not the horizontal. You *should* be using 10x for anything over several kHz though...
Thanks this video helped me alot
Can i travel with oscilloscopes in flight? Please anyone answer
If one probes a signal of 300 MHz on an Oscilloscope (analog) with 50 MHz bandwidth, we might still see the waveform, isn't it ? It's just that it would be highly dim.
+analogy ? The "dimness" will be a function of the sweep speed. The 300MHz signal will be greatly attenuated, and probably not stable (because the trigger circuit will probably be unable to trigger on it).
So how does one know if a O'scope is calibrated?
So that what is being measured is an accurate measurement.Does it need to be taken somewhere to be calibrated? and by who?
You would have to measure a signal of a known amplitude and known frequency to check the calibration. They are often very close anyway, they don't drift much. Also, many times you're just checking to see if a waveform has the right shape (not distorted, etc.), so a perfect calibration is often not really required for hobby or repair work.
Thanks man!
Is the 80KHz equivalent to the cut off frequency???
No, it's simply the measurement of the frequency of the signal that is being measured.
very nice
thanks is a good scope
Thank you !!
THANKS VERY MUCH
Thank you ..........
Never mind...I just saw it on the screen... thanks
Real cool
thank you.
Thanks,