I need your help 12voltvids, i have a Yamaha rx v2095 it is shutting off within 2 seconds after turn on nothing is connected to it i was trying to get it back into service after not using for little over 1 year it turned on fine but the sound was cutting in and out constantly so i cleaned the speaker relays with 91% rubbing alcohol and cleaned the speaker switching buttons and then put things back together exactly how they were and now trying to turn it on it clicks right back off within 2 seconds i get no codes or anything on the display thinking there might be a short somewhere?
Great video as always - I'm doing this on a Sony SLV-715 (PAL market, not sure if it made it to America/America's hat) can get perfect picture but refuses to play HiFi tracks (just a very distorted LOUD buzzing on the right channel) - is there further adjustment or does this mean the HiFi heads have worn out? Annoying as I can get a perfect picture but no audio or a slightly wonky picture and good linear audio!
I was thinking you might use one of those small TV monitors to be able to include the scope, DUT, and monitor in frame at the same time a little better, especially to show changes/tweaks/adjustments on the fly. Didn't get rid of that Sansui/Orion TV/VCR RV set did ya? ;)
Good demonstration of a DSO, this is what I've heard, now we see. I've never had a digiscope, except for one on my old laptop, it sux. I got my Tektronix 2246 for under 200$ w/s&h. They average 300$+, but I gambled and got a good cheaper one. It was calibrated at the shop a few years before I got it, but it's fine. Some of the new digiscopes are multitasking, with spectrum analyzers, function generators, freq counters, and DMM's, seems to have it all in a small box for under 1k$, or even less than 500$. I guess with the digital flat TVs, one might need a D-scope. Sort of like a snapshot of pulses instead. Storage on an oldie was done with a Polaroid film camera back in the 70s, lol. Thanks scopemeister, Don
i have got an nordmende analog scope 50€ on ebay working great but looking forward to recap it cause cirtain thinks sometimes dont work and some potentiometers are also bad but overall a god one
I did this but I didn't have a scope, I just played a tape and turned the tape guide adjustments until those noise lines on the TV were gone. You should try to get this scope to run Doom.
I have 2 analog oscilloscopes. A Tek 2465B and a Tek 2467B. Working with video signals with them is an easy task! Another detail I do not like in DSO is the amount of functions inside menus, in the analog scopes just turn the potentiometers and that's it!
That spikey stuff only seems to show more on a digital scope because a CRT cannot write such high frequencies with any brightness. Since the DSO is displaying the stored waveform it doesn't suffer from this problem. I still prefer analog scopes for analog work. They just present analog waveforms better.
So, did you dump this and get something else or was there a way to make it work with analog video signals to your liking? Looking at getting a scope (analog or digital) but cannot justify blowing $500 - $1,000 USD for something I'll use sporadically. Even in town here guys want as much as they paid for old Tek scopes from the 1980s like I used in school. That's a total rip...
Thank you for talking me OUT of thinking I needed a DSO. Junk. I do all analog work, a traditional CRT scope with Frequency, volts (math functions) for instance a late 80's early 90's Tektronix 4 channel 200 mhz scope for tuners radios and such. I've been hobbling along for 25 years with a Tek 465 from RCA service center when they finally closed (essentially like new) and an outboard Automobile repair based scope with most of the math. I'd like to have more space on my bench though, thus the though of a DSO to consolidate. Thanks again for setting me straight Dave. Everyone is so busy hawking these things as fanboys, no one give us the real-world straight dope! I wonder how many who viewed this feel the same way?
DSO has its place and very high end units are good but they are well beyond anything I am ever going to work on. I am scaling back what i look at. I say no to probably 60% of what i an asked to repair. I don't work on computers, laptops, tablets. Phones, digital cameras ect.
In peak mode the RF Envelope is very acceptable. But is a real challenge, to troubleshooting a Video Chain of a VTR. Especially to check the Y/C Signal.
You need a scope that features intensity gradient display makes a world of a differance when looking at analog, or complex signal's and you need to set trigger mode to video line/feild sync, so it locks in correctly. It would normally be in trigger menu and You will see option's like 525/NTSC to 1080p and Polarty mode and feild sync option's. I also would cut memory deph down to get rid of some of the noise it's picking up. If your scope's don't have these option's, then I would sell it and look for a Rigol, even the Micsig tablet oscilloscope have it and 4 channel's and even intensity gradient for under $500 and yes they added serial decode now for free that people were complaining about. I use it all the time now as much as my meter, as portable and quick in responding, the best bang for the buck currentlly. Digital scopes are better, just a learning curve, but once you get one that suits your need's and get use to it, you won't need a analog scope anymore. www.ebay.com/itm/Micsig-Tablet-Oscilloscope-100MHz-4CH-1GSa-s-tBook-TO1104-Free-Serial-Decode-1/253429779283?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
This one does not have video trigger mode. Nothing in the menu, and the manual, well that is in Chinese, but I can tell you after playing with this piece of garbage for the past year that it doesn't have a video option of a intensity gradient display. I have the Tektronix analog scope now for those jobs. This digital one has it's place for looking at digital signals, frequency display ect.
I'd be leery about condemning all DSOs based on the experience of one inexpensive model. I made that mistake with DVMs. This was back when DVMs were coming out. I was used to analog. The first digital one I got my hands on was a Sencore. It soured me on the whole idea. Years later, I got a Fluke 73. It changed my mind. I'll take it over my transistorized VTVM any day.
Russell Hltn not condemning all dso, just this one will not handle video signals very good at all. it works fine with audio signals and I am using it now working on an FM stereo decoder board. according to the manual there is supposed to be a video mode but not on this specific model. something I wish the salesman had told me before I bought it because knowing it wouldn't display video signals would have been a deal breaker.
I think a better digital scope is better an analog scope, analog scopes are not less noisy the noise is there but it is invisible because noise signals are very weak so the electron gun will not produce enough electrons to excite the phosphor on some scopes you can see it if you crank up the brightness control.
Many of these scopes take a repeating waveform and sample it at a low rate and "acquire" a wave from many repeated "sweeps" so a waveform that is not repeated in phase for multiple sweeps to "acquire" a waveform is a common issue on many of the scopes. Read your manual on the sample rate and the Acquire samples needed. The RF envelope from mechanical playback on tape is not phase aligned from sample to sample so the Acquired wave looks crazy. Better scopes can turn this function off for a lower bandwidth higher noise trace. This averaging function may result in a 10V P-P wave average to 1/8th the normal value.
Could you do one where you show how to use the scope on a stereo receiver and where to make the connections to the scope?. In general, how you would use it for stereo repair. I learned a lot from you showing how to go through the paces. Knowing where to make the connections to the unit for the different test functions is where I need to learn. Thanks, Dave. I appreciate the time you take to share your knowledge with us. If I could give you two thumbs up I would : )
Was a good choice with using peak mode for adjusting the guides and yeah LOL there is a very long learning curve on the cheap DSOs ;). Was the same when I bought mine (DSO1062D) some years back to substitute my old Teks. Yours is definitely not suited to use on complex waveforms. It has only 25k points memory deph (with 512k to 1M you should get better results) and the Uni-Ts are not known to be great. If I would be you, I would give it back and look for a Siglent SDS1000x (I would try this out) or 2000x or Rigol 1000z series, in the long run you will not be happy with yours for the type of work you need it for. DSOs are much better than you think, you just need to find a better model ;).
redcatimaging I completely agree with this. There is a massive jump in quality features and usability between scopes like this and scopes like a 1054z. I don't think you'll ever have anything but frustration from this scope.
I have already contacted the store where I bought it, but of course they point out the "no refunds or exchanges" printed on the receipt, so I am stuck with this dog, which I am not very happy with so far. To that is 600.00 I will never see again. All I wanted was something that was good enough to trouble shoot AV gear, and the salesman at the shop said this was the one to get over the less expensive model.
Yes that is what it was. Was tagged at 750.00 on sale for 569 and the sales guy at the shop said it would blow away my old analog scope. I believe he lied to me
You're using the wrong trigger type. The UNI-T UTD2000/3000 range has a video trigger mode. In the trigger menu, set the trigger mode to "video", and set the standard to NTSC or PAL. (EDIT: For clarification, your trigger mode is currently "edge". It's this you need to change.) Failing that, set the trigger type to "pulse width", set the pulse conditions to "more than", set the pulse width to something longer than a horizontal sync but shorter than a vertical sync, and set the trigger polarity to "negative pulse". Look on page 36 of the manual: drive.google.com/file/d/0B4Jyby-tjH5oTF9hRy1qbzMtOVU/view
That's a good info :), reading the manual it really looks like it has a video trigger. I hope Dave does see this in case he doesn't get the scope changed. The scope is still not worth the money, but this might really help him out.
Different manuals and websites say different things, which is very confusing. Some say it has and some say it has not. I guess as Dave hasn't found it, his model really doesn't have this function :(. The german handbook pdf also says no.
Confusing, to say the least. I'm inclined to agree. If there are different versions for the same model, then I have to think that Dave's particular model doesn't have it, or he would have found it by now. I mean, the setting is very similar to the one on a CRO. (Edit: Different versions for the same model, not different models for the same version.)
What a shame, i really feel sorry for you dave, i thought this dso would have been ideal :-(. Looks like only the 2025 version has video line/feild synk trigger mode :-(. I have an old tandy display scope for fm peaking, it has no calibrated vertical, but it works for basic viewing.
Thanks zx8401ztv *Priceless info (if true),* "2025 version has video line/field sync trigger mode" Too late for Dave, but his new DSO is still a useful tool, it just does not replace the Analog Scope.
You're welcome :-D I got that info from the pdf on uni-t's website, but it was for several versions so i looked at the trigger specs and it said the video trigger mode was only for the 2025. But the trigger mode on daves did not have the video trigger option. Dam uni-t with there crap manuals :-(
Yes, it looks that way according to the manual. Don't know why they don't include the NTSC/PAL trigger option on the other models, that would be useful.
Pete, it's a mess of a manual, they could have made things much clearer, the first page should be the models and features, but that would make choice/understanding far too easy lol.
I would say maybe turn down the memory depth (to 20kb or so if possible) and turn on the bandwidth limit. This cuts down on a lot of noise and makes it a bit more similar to an analog trace. Also the screen updating will be faster. I don't know if these options are available on your scope as I'm not familiar with that one, and I'm not that familiar with analog video signals either. Just trying to think of ideas.
I haven't dug deep into the menus yet. There are a lot of features I haven't gotten to yet as far as displaying a complex waveform. I am use to the simplicity of analog scopes, which are totally useless for looking at digital waveforms.
Yeah, it took me a while to learn my DSO after I bought it, I was so used to my old Tek. And getting digital scopes to trigger on some complex waveforms occasionally make me pull my hair out.
yeah that's a real pissoff with modern stuff, laptops, sat navs, etc, you get no instruction manual. I've never used one before but I have access to an old scope probably 1950s has a small 3 inch screen, might fire it up one day, hopefully I'll learn something from your vids which I enjoy a great deal and appreciate.
Maybe have a word with Dave Jones in Sydney Australia and ask him what settings he uses for viewing Video signals as he has been using these DSO for some time now, Threshold trigger voltage is maybe the one to set to trigger the sweep, should have got an Agilent scopes Dave Jones swears by them.
It's useful, but *imagine a beginner looking at a video signal for the 1st time or troubleshooting... = LOST.* IMO, DSO = Not a good feeling for basic analog electronics and some repairs; too easy to just get lost (and YOU know exactly what you are looking for on a WORKING device!). Vertical serration pulses (and A/B) would be very easy to detect/decode and sync to with just a little software added to the DSO _These DSOs just need a few Video Sync Menu Options:_ H. Line, Porch/Burst, Field, V. Sync, A/B Frame and options to filter/pass 3.579545, etc. How about a Software Vectorscope Option, lol
Believe me had I know how bad it was I would have kept the 700.00 Lee's Electronics took from me. I tried to return it about an hour after I got it because it was useless and they told me to go fu*k myself. The salesman assured me it was more than enough to look at video signals, and well it isn't..
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I need your help 12voltvids, i have a Yamaha rx v2095 it is shutting off within 2 seconds after turn on nothing is connected to it i was trying to get it back into service after not using for little over 1 year it turned on fine but the sound was cutting in and out constantly so i cleaned the speaker relays with 91% rubbing alcohol and cleaned the speaker switching buttons and then put things back together exactly how they were and now trying to turn it on it clicks right back off within 2 seconds i get no codes or anything on the display thinking there might be a short somewhere?
Great video as always - I'm doing this on a Sony SLV-715 (PAL market, not sure if it made it to America/America's hat) can get perfect picture but refuses to play HiFi tracks (just a very distorted LOUD buzzing on the right channel) - is there further adjustment or does this mean the HiFi heads have worn out?
Annoying as I can get a perfect picture but no audio or a slightly wonky picture and good linear audio!
Thanks again for sharing this video. I am heading to learn how to us the cope to adjust the tape path.
Could you explain how did you set up the scope?
I was thinking you might use one of those small TV monitors to be able to include the scope, DUT, and monitor in frame at the same time a little better, especially to show changes/tweaks/adjustments on the fly. Didn't get rid of that Sansui/Orion TV/VCR RV set did ya? ;)
Kink in my neck from trying to watch that scope :)
Good info Dave
Just RF with casset PAL LP or HiFFi?
Good demonstration of a DSO, this is what I've heard, now we see. I've never had a digiscope, except for one on my old laptop, it sux. I got my Tektronix 2246 for under 200$ w/s&h. They average 300$+, but I gambled and got a good cheaper one. It was calibrated at the shop a few years before I got it, but it's fine.
Some of the new digiscopes are multitasking, with spectrum analyzers, function generators, freq counters, and DMM's, seems to have it all in a small box for under 1k$, or even less than 500$.
I guess with the digital flat TVs, one might need a D-scope. Sort of like a snapshot of pulses instead. Storage on an oldie was done with a Polaroid film camera back in the 70s, lol.
Thanks scopemeister,
Don
i have got an nordmende analog scope 50€ on ebay working great but looking forward to recap it cause cirtain thinks sometimes dont work and some potentiometers are also bad but overall a god one
Do you need to use a color bar tape for alignment, or is any tape from an aligned machine good enough?
I came to the comment section to look for this question and hopefully the answer...
Enjoy your new DSO ;-) we learning every day something ;-)
I did this but I didn't have a scope, I just played a tape and turned the tape guide adjustments until those noise lines on the TV were gone.
You should try to get this scope to run Doom.
Hi there, it very good demonstration. I do not have so much space for a big heavy analogue scope. I think I will get a digital one. Thanks
I have 2 analog oscilloscopes. A Tek 2465B and a Tek 2467B. Working with video signals with them is an easy task! Another detail I do not like in DSO is the amount of functions inside menus, in the analog scopes just turn the potentiometers and that's it!
What item are you using to adjust the alignment, it's not a screwdriver your using what's it called and what size, thnx
That spikey stuff only seems to show more on a digital scope because a CRT cannot write such high frequencies with any brightness. Since the DSO is displaying the stored waveform it doesn't suffer from this problem. I still prefer analog scopes for analog work. They just present analog waveforms better.
So, did you dump this and get something else or was there a way to make it work with analog video signals to your liking? Looking at getting a scope (analog or digital) but cannot justify blowing $500 - $1,000 USD for something I'll use sporadically. Even in town here guys want as much as they paid for old Tek scopes from the 1980s like I used in school. That's a total rip...
Could you use 1 channel oscilloscope for this job?
Sure it just won't lock on the switch point.
Can you make a video of Betamax path alignment? These machines were more complicated to align than vhs
When purchasing a scope you do pay for what you get. In practical terms the analog scope is less noisy and does give a crisp waveform to work with.
Thank you for talking me OUT of thinking I needed a DSO. Junk. I do all analog work, a traditional CRT scope with Frequency, volts (math functions) for instance a late 80's early 90's Tektronix 4 channel 200 mhz scope for tuners radios and such. I've been hobbling along for 25 years with a Tek 465 from RCA service center when they finally closed (essentially like new) and an outboard Automobile repair based scope with most of the math. I'd like to have more space on my bench though, thus the though of a DSO to consolidate.
Thanks again for setting me straight Dave. Everyone is so busy hawking these things as fanboys, no one give us the real-world straight dope! I wonder how many who viewed this feel the same way?
DSO has its place and very high end units are good but they are well beyond anything I am ever going to work on. I am scaling back what i look at. I say no to probably 60% of what i an asked to repair. I don't work on computers, laptops, tablets. Phones, digital cameras ect.
How to conect DSO at location vcr test point showing at vcr location
In peak mode the RF Envelope is very acceptable.
But is a real challenge, to troubleshooting a Video Chain of a VTR.
Especially to check the Y/C Signal.
You need a scope that features intensity gradient display makes a world of a differance when looking at analog, or complex signal's and you need to set trigger mode to video line/feild sync, so it locks in correctly. It would normally be in trigger menu and You will see option's like 525/NTSC to 1080p and Polarty mode and feild sync option's. I also would cut memory deph down to get rid of some of the noise it's picking up. If your scope's don't have these option's, then I would sell it and look for a Rigol, even the Micsig tablet oscilloscope have it and 4 channel's and even intensity gradient for under $500 and yes they added serial decode now for free that people were complaining about. I use it all the time now as much as my meter, as portable and quick in responding, the best bang for the buck currentlly.
Digital scopes are better, just a learning curve, but once you get one that suits your need's and get use to it, you won't need a analog scope anymore.
www.ebay.com/itm/Micsig-Tablet-Oscilloscope-100MHz-4CH-1GSa-s-tBook-TO1104-Free-Serial-Decode-1/253429779283?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
This one does not have video trigger mode. Nothing in the menu, and the manual, well that is in Chinese, but I can tell you after playing with this piece of garbage for the past year that it doesn't have a video option of a intensity gradient display. I have the Tektronix analog scope now for those jobs.
This digital one has it's place for looking at digital signals, frequency display ect.
I'd be leery about condemning all DSOs based on the experience of one inexpensive model. I made that mistake with DVMs. This was back when DVMs were coming out. I was used to analog. The first digital one I got my hands on was a Sencore. It soured me on the whole idea. Years later, I got a Fluke 73. It changed my mind. I'll take it over my transistorized VTVM any day.
Russell Hltn
not condemning all dso, just this one will not handle video signals very good at all. it works fine with audio signals and I am using it now working on an FM stereo decoder board. according to the manual there is supposed to be a video mode but not on this specific model. something I wish the salesman had told me before I bought it because knowing it wouldn't display video signals would have been a deal breaker.
I still keep my analog scope. I have both analog and digital, but sometimes its easier to use the analog version.
I think a better digital scope is better an analog scope, analog scopes are not less noisy the noise is there but it is invisible because noise signals are very weak so the electron gun will not produce enough electrons to excite the phosphor on some scopes you can see it if you crank up the brightness control.
Sorry your new scope isn't working out. Can't wait till you try it on tv & audio.
Many of these scopes take a repeating waveform and sample it at a low rate and "acquire" a wave from many repeated "sweeps" so a waveform that is not repeated in phase for multiple sweeps to "acquire" a waveform is a common issue on many of the scopes. Read your manual on the sample rate and the Acquire samples needed. The RF envelope from mechanical playback on tape is not phase aligned from sample to sample so the Acquired wave looks crazy. Better scopes can turn this function off for a lower bandwidth higher noise trace. This averaging function may result in a 10V P-P wave average to 1/8th the normal value.
Could you do one where you show how to use the scope on a stereo receiver and where to make the connections to the scope?. In general, how you would use it for stereo repair. I learned a lot from you showing how to go through the paces. Knowing where to make the connections to the unit for the different test functions is where I need to learn. Thanks, Dave. I appreciate the time you take to share your knowledge with us. If I could give you two thumbs up I would : )
Was a good choice with using peak mode for adjusting the guides and yeah LOL there is a very long learning curve on the cheap DSOs ;). Was the same when I bought mine (DSO1062D) some years back to substitute my old Teks. Yours is definitely not suited to use on complex waveforms. It has only 25k points memory deph (with 512k to 1M you should get better results) and the Uni-Ts are not known to be great. If I would be you, I would give it back and look for a Siglent SDS1000x (I would try this out) or 2000x or Rigol 1000z series, in the long run you will not be happy with yours for the type of work you need it for. DSOs are much better than you think, you just need to find a better model ;).
redcatimaging I completely agree with this. There is a massive jump in quality features and usability between scopes like this and scopes like a 1054z. I don't think you'll ever have anything but frustration from this scope.
I have already contacted the store where I bought it, but of course they point out the "no refunds or exchanges" printed on the receipt, so I am stuck with this dog, which I am not very happy with so far. To that is 600.00 I will never see again. All I wanted was something that was good enough to trouble shoot AV gear, and the salesman at the shop said this was the one to get over the less expensive model.
If I could return it, it would already be back at the store. They are playing hardball.
12voltvids wait. you paid $600 for that?!?
Yes that is what it was. Was tagged at 750.00 on sale for 569 and the sales guy at the shop said it would blow away my old analog scope.
I believe he lied to me
You're using the wrong trigger type. The UNI-T UTD2000/3000 range has a video trigger mode. In the trigger menu, set the trigger mode to "video", and set the standard to NTSC or PAL.
(EDIT: For clarification, your trigger mode is currently "edge". It's this you need to change.)
Failing that, set the trigger type to "pulse width", set the pulse conditions to "more than", set the pulse width to something longer than a horizontal sync but shorter than a vertical sync, and set the trigger polarity to "negative pulse".
Look on page 36 of the manual: drive.google.com/file/d/0B4Jyby-tjH5oTF9hRy1qbzMtOVU/view
That's a good info :), reading the manual it really looks like it has a video trigger. I hope Dave does see this in case he doesn't get the scope changed. The scope is still not worth the money, but this might really help him out.
I believe that option is only available on the UNI-T model UTD2025CL (noted on page 36 of the manual), apparently not the model that Dave has.
Different manuals and websites say different things, which is very confusing. Some say it has and some say it has not. I guess as Dave hasn't found it, his model really doesn't have this function :(. The german handbook pdf also says no.
Confusing, to say the least. I'm inclined to agree. If there are different versions for the same model, then I have to think that Dave's particular model doesn't have it, or he would have found it by now. I mean, the setting is very similar to the one on a CRO.
(Edit: Different versions for the same model, not different models for the same version.)
Aaah, good catch Pete. I skimmed straight over that one little detail. Thanks!
Yikes! I see what you mean. Looks like i'll use an HP54645D......to hell with that DSO.....for video application at any rate.
What a shame, i really feel sorry for you dave, i thought this dso would have been ideal :-(.
Looks like only the 2025 version has video line/feild synk trigger mode :-(.
I have an old tandy display scope for fm peaking, it has no calibrated vertical, but it works for basic viewing.
Thanks zx8401ztv *Priceless info (if true),* "2025 version has video line/field sync trigger mode" Too late for Dave, but his new DSO is still a useful tool, it just does not replace the Analog Scope.
You're welcome :-D
I got that info from the pdf on uni-t's website, but it was for several versions so i looked at the trigger specs and it said the video trigger mode was only for the 2025.
But the trigger mode on daves did not have the video trigger option.
Dam uni-t with there crap manuals :-(
Well at least everyone knows what NOT to buy!
Yes, it looks that way according to the manual. Don't know why they don't include the NTSC/PAL trigger option on the other models, that would be useful.
Pete, it's a mess of a manual, they could have made things much clearer, the first page should be the models and features, but that would make choice/understanding far too easy lol.
Not all DSOs are equal. You get what you pay for and $269us is very cheap so not surprisingly it's missing many triggers and features.
Digital, Smigital.
I would say maybe turn down the memory depth (to 20kb or so if possible) and turn on the bandwidth limit. This cuts down on a lot of noise and makes it a bit more similar to an analog trace. Also the screen updating will be faster. I don't know if these options are available on your scope as I'm not familiar with that one, and I'm not that familiar with analog video signals either. Just trying to think of ideas.
I haven't dug deep into the menus yet. There are a lot of features I haven't gotten to yet as far as displaying a complex waveform.
I am use to the simplicity of analog scopes, which are totally useless for looking at digital waveforms.
Yeah, it took me a while to learn my DSO after I bought it, I was so used to my old Tek. And getting digital scopes to trigger on some complex waveforms occasionally make me pull my hair out.
yeah that's a real pissoff with modern stuff,
laptops, sat navs, etc, you get no instruction
manual. I've never used one before but I
have access to an old scope
probably 1950s has a small 3 inch screen,
might fire it up one day, hopefully I'll
learn something from your vids which
I enjoy a great deal and appreciate.
Maybe have a word with Dave Jones in Sydney Australia and ask him what settings he uses for viewing Video signals as he has been using these DSO for some time now, Threshold trigger voltage is maybe the one to set to trigger the sweep, should have got an Agilent scopes Dave Jones swears by them.
I would just use a bandwith limit to get rid of the noise.
It's useful, but *imagine a beginner looking at a video signal for the 1st time or troubleshooting... = LOST.* IMO, DSO = Not a good feeling for basic analog electronics and some repairs; too easy to just get lost (and YOU know exactly what you are looking for on a WORKING device!). Vertical serration pulses (and A/B) would be very easy to detect/decode and sync to with just a little software added to the DSO _These DSOs just need a few Video Sync Menu Options:_ H. Line, Porch/Burst, Field, V. Sync, A/B Frame and options to filter/pass 3.579545, etc. How about a Software Vectorscope Option, lol
uni-t rubbish, buy a proper DSO
Believe me had I know how bad it was I would have kept the 700.00 Lee's Electronics took from me. I tried to return it about an hour after I got it because it was useless and they told me to go fu*k myself. The salesman assured me it was more than enough to look at video signals, and well it isn't..