How to BREAK Your New Signal Generator - UNI-T Model UTG2025A Signal Generator DEMO TEST
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- Опубликовано: 19 окт 2024
- In this video, we'll unbox a new UNI-T (Uni-trend) UTG2025A Function/Arbitrary Waveform Generator bit.ly/UNISigGen , promptly break it, then fix it again. This unit was provided to me by the manufacturer for review and demo. Although the website offers a downloadable manual, we'll barely reference it, and instead we'll just bumble our way through. This model appears to be a nice budget alternative to other waveform generators from companies such as RIGOL and Tektronix.
FEATURES:
UTG2025A has 25MHz maximum output rate, 125 MS/s sampling rate, and 14-bit vertical resolution. It has equivalent dual channel independent output, modulation, sweep frequency, Burst, and other complex waveform generation functions.
1. 1μHz full-band resolution
2. 5MHz~30MHz pulse waveform, adjustable rise/fall time
3. 14-bit/16-bit vertical resolution
4. Two equivalent-performance channels
5. Max arbitrary waveform length of 8k/16M points; 48/161
6. non-volatile waveforms storage
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Educational and practical. I now know my ears still hear well even after all these years of rock. Thanks for the free hearing test.
I was thinking the same thing, Mike! Those really high freq.s I thought I might not hear? Well, I can still detect them. Thanks Brad.
You know you've made it when companies are sending you free test gear to demo
In case you haven't figured it out - when you were tweaking the upper limit, you set it to 0 for a moment. That changed the output level to a really low level. Your output was set to 3mv instead of 100mv. If you'd gone back and looked at the sine wave parameters side by side with the channel 2 parameters, you probably would have seen it.
Simple issue, the amp limit you set changed the amplitude to match your 0V limit, after you returned you had 3mV output on upper and 2mV on lower since you messed with the offset earlier.
You would have been proud of me today Brad, I was looking at used electronics and out came the trusty screwdriver and I disassembled an amp in the middle of a busy isle, turns out it wasn't old, tube driven or working but I did come home with a copy of The Beatles White album complete with real 70's hippy stains on the sleeve for just a few dollars. It happened, I had a Brad moment, :)
My cats are going crazy over the noise thanks for the hearing and sanity test!
By messing with the settings you changed the square wave to have a low level of 1mV and a high level of 3mV. And a signal with just 2mV of amplitude is just really quiet.
I was shouting this at the screen when he was messing around.
Nice tool to send my labrador to her bed! Thanks brad for the peace and quiet!
"It happened when I was messin' around with that".
There has to be some words of wisdom that would apply to this situation.
Swankdaddy if only.
Words of Wisdom: "Well, don't do dat!"
I just use Billy Corgan's Tone Generator. I paint my guitar red or blue accordingly. But never use the pink ones. Those aren't done yet.
lol, your bulling the bald guy
It’s a nice unit. Tonnes of options, and the learning curve doesn’t seem to difficult. Seems like overkill for guitar amp applications, but hey .. it was free :)
Nice to see you do a video again related to an electronic technician role. Long overdue.
This is my dogs favorite video you have made so far.
brb...gotta sculpt the devil's tower outta mashed potatoes real quick
🤣
You need to oscillate the ventral tactical power coupling dude. Check the fraculator.
Playing with these things in class was like sitting in a restaurant by a guy going through his ringtones on his new phone.
It is so funny watching you play with that generator. As you run through stuff I take for granted it is obvious that it does far more than you will ever need. It does look like a great bit of kit in general though. What is its highest frequency that one runs up to? You touched on sweep but it is great to show the response in an amp in your case. Shove it on sweep on the input, put an oscilloscope on the output and you will see how well the amp responds to bass or treble. Great video anyway Brad!
This is why I use vintage (old and cheap) equipment......Stuff that's "too fancy" just impedes progress.
Dead Koby, I give you a 100 thumbs up for that comment. I'll take vintage test equipment any day. At the stereo repair shop I work for, every piece of test equipment on my bench Is around 30 to 35 years old, except for a Rigol digital oscillo scope, which I don't really like, but when I added other equipment to the bench I needed a very small two channel scope that would fit in a very small area. (Though we have a Textronix scope on a rolling cart that I can bring over to the bench if I need a proper analog scope with high resolution). The heart of my test bench is a Nakamichi T-100 audio analyzer and tone generator which, in conjunction with a patch panel and switchable dummy loads, can test power output, distortion and frequency response, voltage gain, , extraneous noise and intermittent operation, and so on. Every now and then I have to clean the switches on it, but otherwise ir has been pretty much trouble free, knock on wood! Someday I know I will have to recap it; not looking forward to that, and recalibrating it would be a nightmare.....
@Paul J Pachasa JR , no it's somewhat more modern, a tektronix model 2235. The older scopes are so common, and cheap at hamfests, and repairing and calibrating them is so daunting, that they often sell for 20 bucks to guys who cannibalize them for parts and tubes.
This is cool. What are your thoughts on using this vs. an app on your phone or whatever software? Basically software vs. hardware for this type of thing. And do you have a similar video on oscilloscope? I'm asking because i might need something like this at some point, and thinking if it is worth it vs. conventional software, since this stuff is quite expensive.
Thanks.
Probably depends on the accuracy you want and frequency response. For audio the sound card solutions are quite good. You can program square waves out of an Arduino with reasonable accuracy. I guess this is used to load an amp with a known signal to look for distortion etc. If you were doing professional repairs I figure you need a calibrated source. If you are hobby then hacked solutions work well a lot of the time.
I made a video about an editor i wrote for Akai Miniak and I show usage of a software scope (including links) ruclips.net/video/IXIfTyuafro/видео.html
Around 4:44 I start using the scope showing it in time and frequency domain. Watching this back i can see the software scope was quite slow. Modern PCs might be a lot quicker. But it is usable. I got a real 20MHz scope later and much faster monitoring etc. These modern digital scopes are cool for around £200. There again I would probably rather put that money towards and instrument and cheap out on sound card scope - your milage may vary.
Looks like a nice Sig-Gen Brad.
All you need now is a dummy load and a cheap scope and you'll be able to see everything 😊
Holy Cow you beat my function generators ! My big old 4003A BK Precision, works fine not complected. My tiny Koolertron is great and less filling, size of a car stereo. All you need is 1K at 100mA with NO DC .
Like a real Man's Man... treat instructions as packing material, just start pressing buttons and going to town :}
Peter Southern Boy a real manual would have been nice. They won’t give you those anymore. They’d have to print it in a dozen languages.
@@TheGuitologist , My suspicion is that electronics manufacturers are in collusion with the people who make printer cartridges, so that when you buy a piece of electronics such as test equipment or an audio video receiver for your TV system, the manual is well over a 100 pages and if you print them all out at home you will use up a $40 print cartridge and have to go buy another one!
Its a nice generator with a lot of features at a reasonable price. I was looking at a Rigol. Thanks for the video.
reminds me of Ultrasonic Testing equipment i used on field welded joints of buildings and bridges . calibrate before use .
Yeah, I'd love to see a demonstration of that testing some time.
@@TheGuitologist retired now .. transducer degree to be used is calibrated to 1 in steel block with 1/16 hole , properly calibrated noting highest peak on display . reads air gap as the speed is different in steel vs air , air being the flaw in weld . or climb a building and enjoy .
Cool Beans!! You're giving my dog fits..............
Your knowledge is always awesome to absorb. Thanks!
Did you you run dotNetFx40_Client_x86-x64 program to install the USB drivers ?
Stop playing with your unit Brad, you'll go blind :)
Moderate Extremist .... he already wears glasses..
That's funny 😂
@@wrenchhead4378 Oh No!!! My warning was to late!!!
Moderate Extremist took me a while to find the reply button.
@@TheGuitologist hehe :D Jokes aside, the UTG2025A is really cool, my bench is jealous!
Nice to have a good peace of test gear.
I was using a looper pedal as a signal generator until I accidentally touched +9v on the line and popped a diode in it (oops). it was an EHX 720! I was able to fix it, but lesson learned.. Now I just throw a 555 timer on a breadboard with a pot; add an inductor if I want a smooth wave.. works fine for what I do.
DEAR THANK YOU VERY MUCH FOR A VIDEO , I WANT TO ASK WHAT IS THE MINIMUM PULSE WIDTH FOR THAT UTG-2025A?
4:29 "You also have 10 MHz in and out......"😂😂😂 Love the fact we can hear you had no idea what it's for.....😂
Thanks Brad! I was hoping that you would scope it and see how clean and accurate the waveforms are.
I have an older scope, but I'm hoping they send me one of those as well and we'll test both.
Maybe they will send you a Siglent SDS1204X-E like mine??
I have one of these feeding my flux capacitor, awesome dude!
10:20 this sound reminds me of my last moments with my dead grandpa.
You wanted your upper limit, you got your upper limit.
edit: OK - You got that fixed. That's what I usually use manuals for - undoing the stuff I break by mashing buttons in an indiscriminate manner, lol.
Nice to see you back messing around with some type of hardware. Do you still fix amps? Not trying to be obnoxious. Like to see an old fashioned amp vid.
Don't know if you have a Scope if not there are Shareware to use your sound card as a Scope. I use the Scope to see what the wave is doing like clipping or just tracking.
And some VSTs will do spectrum analysis too - for free. I bought an old Oscilloscope from a dude on eBay. He sold it cheap because it didn't make the right noises ... Still wondering if he was muddling it with an oscillator :-)
Awesome unit !!! Thanks for the demo, Brad !
Looks like a really nice quality little waveform generator. And, yes, 'restore factory settings' can be an invaluable tool! Cheers P[>
It does, laboratory grade, and i bet it can be sent out for calibration certification if the situation requires as well. The price is good, real good when compared to the equivalent Tektronix, Siglent, RIGOL. My bench is jealous with it's old stuff, lol.
"Did you try turning it off and back on?"
@8:10 How high is the test amp rated to go? I couldn't hear anything past 12kHz unless I went full volume and even then background noise was drowning out the sine wave almost completely. Good video anyway!
You could make an EDM album with that little device 😂.
Brad, Don't feel too bad about having screwed up the menu on your new toy and having to do a factory reset to get it working again. My boss, a ham radio operator who has electrical and electronics engineering degrees up the wazoo, managed to screw up the digital scope on my bench to the point where we had to do a reset on it! Which is why I generally prefer analog equipment.....and although I have several Fluke DMM's to work with, there are some things for which an analog meter is definitely preferable.
You could always use the waveforms as an oscillator for a little modular synthesiser if you wanted to get more functionality from the device!
You can set up a sweep of a certain frequency range, rate of change and duration. It comes in handy for test tremolo on amps.
Also, the inversion comes in handy for doing anything that requires a balanced input signal, like a PA or Mixer.
Nice one Brad. It's not something I would use but interesting vid, cheers, have a good weekend!
Was watching this next to my dog, the high pitch noises made him freak out.
That thing farts 'n toots like a mini-moog.
p m except for an EMS
Does this generator still work? I would buy one if it's any good. Till now looks like a no-go one for me.
It's not broken. Go to 23:00 and read the screen on the sig-gen. 3mV high, 1mV low signal. Lowering the max output squished the signal.
also @28:34 Dumb question, but did you install the dotnetFX? If you didn't it prolly the UI for importing the arb files won't open.
I spent the extra and got a Rigol, no regrets.
Any thoughts on Siglent vs Rigol?
I have a Rigol dsa815tg Spectrum Analyzer w/tracking generator (up to 1.5GHz) and their 1102e scope.
I have been satisfied with the spectrum analyzer, but haven’t used the scope for much of anything yet.
I mostly use the spec analyzer for tuning RF duplexers for public safety
and amateur (“ham”) 2-way radio applications.
The Rigol 815 cost a fraction of what I paid for my Agilent n9340b unit.
(handheld spectrum analyzer with pre-amp and tracking generator options / 3GHz)
The Rigol was $1950 with TG option when I purchased it and is currently under $1500.
The Agilent was slightly over $9800 and is now discontinued, but probably still available on eBay or other sources.
Though the Agilent is much better designed & constructed and more precise, the Rigol display is significantly better.
Unless I am doing work in the field, I generally pick the Rigol to use just for the larger and brighter screen.
I have the horrible habit of buying test gear on Amazon. I always seem to get fooled by the photos that make
everything seem nicer and larger than the CHINESIUM crap I get when I open the box. I bought a Kooler tron
signal generator (small & portable silver metallic chassis unit) for around $140 but it turned out to be a p.o.s,
I kept it because I (as always LOL) missed the return cut-off date. So, I went back and bought the “bench top”
Kooler tron model. Absolute crap. It weighed all of 5oz and was constructed of flimsy yellowing plastic.
I don’t know what, if anything, I really need a function generator for. I have a ton of more specialized RF
/ 2-way radio servicing gear already. Everything from paging tone generators
(QC1 and QuickCall2 / POCSAG / DTMF / 5-tone / etc...) and RF frequency signal generators, etc.
But... it’s definitely something I should have on the bench as I get more into the electronics part
of the field and with the whole permanent PlanDemic lockdown situation, I suddenly have much more free time
/ “learning time” on my hands. 😷🦠😳
AND... To the guitar video channel owner =Thanks for the video !
Ooh, one more thing (as Columbo says) a word from the wise, use a 1:1 audio transformer between the unit and the equipment you are testing in the unit doesn't have one built in. It will remove the risk of blowing it up if you're stabbing around injecting signals in a crusty old amp.
At 21:30 you turned the upper voltage to 0. Not sure if the lower voltage mirrored so that you say output 0v. I gotta believe that is very quiet. After that when you were looking at the frequency it looks to be 1M kHz. I am pretty sure no one can easily hear 1GHz :-). But since I am viewing via phone maybe I am misreading the display. I was looking for eeVolt explosion :-).
16:08 Sounds like a homing signal for E.T. Look out Brad!
Good afternoon . please tell me where to get the firmware for the device? only from the manufacturer? is it not freely available?
Will it pick up a Cubs game? If not that should be optional.
If it could, it would just end up being another disappointment.
I hate menu driven controls when troubleshooting. I want dedicated controls for frequency, amplitude, DC offset, sweep width, sweep rate, etc., like my '80s vintage B&K 3020 signal generator has. I find a triangle wave very useful for determining the clipping point. The sweep function is valuable for testing tone control circuits, crossover networks, and setting up Zobel networks.
I agree. Dedicated buttons for the types of waveforms would be nice, and maybe a "set it and forget it" default sweep button. Good call.
13:30 from the other room "fuck what are you doing? Sorry dear 3am here
Bit of a Beavis and Butt-head moment there at 29:08 ! 😀👍😲
Lol brad tripping out at the sounds of frequency modulation. That’s most of what my videos are, my sitting in front of synthesizers doing that LOL
I’ve got a UNI-T benchtop DMM that is awesome
The signal generator has a usb slot on the front of it. You may have to save the file onto a flash drive and upload it to the generator that way. Plus you can save screenshots of the screen onto flash drives as well. Having a screenshot helps because if something happens you have all the parameters saved on the screen.
Also pretty nice to capture waveforms from a scope and replay them with the generator.
Maybe. It's supposed to interface with your computer, and that functionality wasn't working when I tried it. I'm sure if I spent time chasing down drivers and stuff I could eventually get it working, but eh. I don't foresee ever needing to create and use arbitrary waveforms at all. Maybe one day I'll need to skip school like Ferris Bueller, I'll figure it out then. :D
Who wants to read a manual when I’m perfectly capable of screwing anything like that with no help whatsoever...!!
When you're wondering what went wrong, it says right there on the screen that the output of Ch1 is set to 1mV low and 3mV high, so it should indeed be very low volume. =)
What oscilloscope do you use?
nice....you set the output voltage down on channel 1......but a zillion times more than an AUDIO FQ guy like me needs.
Hey brad can you turn down the natives sons ad 3 or 4 db? I always have to turn it down alittle. Im listening on a pair of beherenger monitors. No big deal. Thanks man love the podcast!
Guitar amplifiers manufacturers are starting to use DSP processing rather than desecrate components and PWM output stage rather than analogue amplifier circuits e.g. Blackstar Silver-line.
Fast forward to @22:00 when Brad breaks it lmao
Guitar amp - look at schematic before releasing video, this new & useful piece of tech - nada
"When you don't know what the fuck yer doin', ask an amp-tech!!" :-) (Yep, I'm a wise ass....)
I've since stopped using signal generators since I blew my nice Instek one up probing blindly around a synthesizer. They really need to drop a fuse on the outputs.
Ideally you'd use an 1:1 audio transformer to isolate the thing and avoid damage.
@@DrWatts-bi1jv , or at least a coupling capacitor in series with the probe to prevent voltage going into the test equipment...
If it's not broken don't fix it...wait...
Interesting piece of gear but typical of modern stuff..sooooo many features that most techs will never use...if you need all that stuff you will probably need a higher quality unit....dunno..at this point in my life I just want to avoid having to Wade through tech manuals learning about all the time saving 'features'...life is too short. However sometimes you must surrender and RTFM. Personaly,for what you do, I would just stick with the simpler tone generator for most stuff..you would just be doing simple signal tracing, Yes? Just a beep you can hear, sine wave you can see on a scope,if you use one, that's all you need for most troubleshooting amps. Thanks for another interesting vid, Cheers!
i don't see a humbucker ,singlepole or a solid state or tube amp selector for tone. wait didn't you have a room full of old tone generators you were showing on a previous vid?
lets take it apart!
Looked like me when I bought a Kemper.
Look like me when I broke a Kemper....,
Get something blown is never a good thing. Well, most of the time... You know...
You wouldn't believe this chick I know..... I'm not even going into detail she just loves it.
I have been looking at their DMM's, the one bad thing I have heard about them is that the input is not well protected.
Does it go to 11? :)
You have it in High Z mode which is high impedance mode. High Z mode cant drive the amp input. You need to set it to 50 ohm mode again! :-)
@The Guitarlogist
The output impedance of the generator must be lower than the input impedance of the amp
This is incorrect.
Yes i saw he turned the amplitude down after messing with the settings after i commented. And that is most likely his problem. But impedance matching is very important! If you are not doing this you can damage your equitment :-)
Please be more specific in your answer??
the sweep feature can be useful too !
I felt compelled to make a "Jon Pertwee/Doctor Who/Third Doctor/U-N-I-T" mention; sorry!
YO BRAD! @24:56 Well there's your problem, you've got your period set WAY too short, which in case effectively changes the pitch of the tone to one that's out of hearing range. ;)
The lower limit is higher than your upper limit. Of course, I'm just being a smart arse. I bet if I looked at the comments I'd be the one-millionth smart arse to suggest this so I should get a prize, Shirly.
I realize I did that momentarily, but I turned the limit back to where it was and the sound was not restored.
@@TheGuitologist I'm still a smart arse though, right?
its' funny, i hit the youtube icon in the upper left hand corner now, and i get NOTHING from the Guitologist
I have a cheap one just to break in new speakers. You can set it really slow, like 1 pulse per second, then increase it up. I will break in a new speaker starting a 40 Hz then increasing up through the guitars range. I built an isobox to place the speaker into so it doesn't cause a divorce. lol hearing a monotone pulse for 12 hours is a dangerous wife irritant.
You can get great tone generator apps for you mobile phone.
There's probably an app that will do this. If not, you should get on that.
Brad, I bet your dog hates you! Until you beg for forgiveness with lots of treats. :D
"UNI-T" Isn't that what Charlie "Yo-My-Forehead-is-Bumpin'" Murphy had imbedded in his forehead after "I'm" Rick JAMES BEOTCH punched him?
Indeed! Darkness brothers!
The biggest thing you have to do with a signal generator, is to match your load impedance. You will eventually take out the channel output if you don't.
I was actually going to do a video on this very thing, back when I was doing my Tech Talk Tuesdays, but there are much better videos of this out there than I could do. After I ran across this one ruclips.net/video/kOy0afN6lTs/видео.html I didn't see the point in making one. It pretty much sums it up. Check it out.
самое главное что нужно сделать с этим генератором , это сохранить прошивку . потому как в случае аварии , производитель её не высылает
I tried to listen to this and now my dog is pissed at me
Sorry bout that, doggie. I know it was rough.
440Hz is the best for guitar amp!
wish my UT equip. had a siren that went off loud enough for the welders to hear when it found a failed weld .
neighborhood dogs and cats must love you.....lololol
Manual? We don't need no stinkin' manual...PS I turned your unit down remotely because it hurt the old bats, i mean my wife's, ears. Ha! Free draw? Its a 5,000.00 etch a sketch
I’ll bet dogs around your shop are lousing there minds!
23:46 3mV upper?
I hope your Ears go Past 14K ! Probably the Speaker and amp. My ears check out at 17K, but I wore Ear Plugs, for playing and roadie work.
I have an old tube powered audio generator :)
And this concludes today's hearing test.