Low Cost Signal Generator 80MHz 2 Channel by Junctek JDS8080 ARB review
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- Опубліковано 3 вер 2022
- In this video 'Low Cost Signal Generator 80MHz 2 Channel by Junctek JDS8080 review', I'll look at a new generator by Junctek. It is the JDS8080 and it is an 80MHz signal generator, it is actually an ARB generator with 2 channels. There is a discount code at the link below. #ARB, #generator
First 20 people get 40% discount! See discount here; "At present, our products are still in the promotion stage, so there will be a discount code of $40 (only 20 places)
CG6JEBQN49VN"
New discount code (not sure if it replaces the one above or how many can use it): 9EIAQI1R1ANT
Link to Junctek Signal Generator: www.aliexpress.com/item/10050...
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Hi Eddy, that Junktec generator has a lot of functionality but 0,6% THD is a bit on the high side, specially if you want to measure a Shiit pre-amp. Jokes aside, I am impressed by the low cost and extensive features but for now, I am sticking to my vintage Philips function generator. Only one channel and only 30MHz but a much cleaner square wave and all silky smooth analog dials. No app is beating that. I can not measure THD. I have only an analog scope. But I am thinking of buying a 16 bit 5MHz Picoscope. That should be able to measure THD to 96 dB and I believe has its own function generator build in. I am mainly interested in audio, so 80 MHz is not a priority for me.
HI Eddie, cool video. Thanks for the info. 😁👍
Thank you so much!
It's an unfortunate name, but it looks good for the price. Wish I had access to such low-cost gear when I was starting out.
Thanks John - I agree!
--flick-- "everyone has a little bit of Australian in them, right?"
I will admit, chuckles were had...
LOL - thanks;)
Helpful jenrater and useful too liked and thanks
Thanks so much!
Hello Eddy. You have nice videos. But sometimes I get the feeling you are not prepared. Your explanations are jumping all over the place. I would suggest to read the manual first and write down a kind of script before you start recording. I will keep on folowing your channel, so keep up the good work.
Thanks so much! Sorry - I'm always trying to improve, but honestly I have a tough time scripting things;) Even when I taught at the community college, I couldn't follow a script, but I had students keep coming back;) It is tough to spend so much time doing these videos and holding down a day job - and trying to spend time with family. If I could do this full time such as other channels that are bigger - that would be fantastic! But, it takes so much more work now to make it on youtube. I appreciate you sticking it out;)
At least one heat sink will be for the dds. I'm afraid it is digital at heart. What I really love to know is what the inputs and sinks do.? If this can be sync with low jitter, it is much more useful.
Ilike thw name"Junctek" ... look like synonim of quality:) I bot one of the first vertion of this waveform generators whey it had non polarized power. I generat it wok pretty good.Had some issue with trigeting from external source. Got some artifac
LOL This looks pretty good for the price point and what it does. I'll take a look to see if I can do an upgrade in a simple way.
Wait, did they really call it "junk tech"?
LOL - the name should have been different I think;)
Seems like Chinese are knocking off their own Junctek VS Juntek (makers of psg9080). Lol.
Thanks for a fair honest review. I always enjoy your experienced take on electronics stuff.
Thanks for your feedback! I appreciate you!
Same company. Different branding?
Dear friends, we are Hangzhou Junce Instrument Co., Ltd. Our trademark is currently in the transition stage from JUNTEK to JUNCTEK, which means "even, stable," in Chinese;
@@junctek1802 Maybe you are not aware but JUNCTEK is pronounced junk tek in English. Junk means "useless, trash, garbage". I would suggest something like JUNCETEK instead, which would be pronounced Junce Tek.
These low cost signal generators are sold under different names like Joy-IT, with almost exact the same specs. With the previous 60Mhz versions (JSD6600), there was a OK button, if you hold that button for a few seconds untill you hear the beep, the settings at that time are saved when you restart the device.
I guess with this version, it is the OUT button that save the settings on reboot.
These low cost signal generators do the job and are ideal for DIY and starting electronics, but they all suffer from the same problem, and that is the noisy switching powersupply and the low power output stage. The previous 60Mhz models like the Joy-IT JDS6600 used a external 5V switching powersupply, i use that model of signal generator and power it up with my linear bench power supply to have a cleaner signal.
Thanks Bjorn for the tip! I'll try that;) Yes, they are a Chinese company.
Thank you for your comments
The video is wonderful, thank you!
Thanks so much! I appreciate you!!
ahh i just bought that uni-t 30mghz generator from ali a couple of days ago. Should have waited so i could use this coupon haha great video
I bought one of those too, a while back. Oh well.
I need to compare it to my Uni-T to see which has the better waveforms;)
Cheap BNC conector might have problem with graunding as the metal is too soft so when you ploog them you in they squize and get loose. I usualy in that situation take twezzer and spred the shilding so it fit tighter.
Thanks for your feedback! I'll look into what I can do for an upgrade. Maybe some filtering, maybe BNC connector replacement? I'll take a closer look;)
The metal BNC used in JDS8000 is very solid
Do you know of a frequency generator with.2uv amplitude
Could that crosstalk be a grounding issue? Are the grounds on the BNC actually...grounded? I ask because I know that's a little detail that gets overlooked with a lot of the signal generators at this price point....
Great insight! I will do a video that looks deeply into this.
Check out the PSG9080 and it will be like night and day for you! Hell, even the cheapo KKMoon/Junktek/FeelTech/TZT/Cleqee etc. etc. rebadged generators at the lower end (20-60mHz) do better than what you have (which may be a rebadged nurffed model rather than a knock off).
I know, I have a KKMoon FY6900 (60MHz) which does better, not hugely, and is only us$100, but still better square wave and no crosstalk.
One of the things that varies a LOT from all these different brands is the output amp. the FY6900 is one of the better ones. Wish I had the PSG9080, at at twice the price of what I have, cannot spend the money, unless Elon wants to throw some my way! :)
Thanks for the great feedback Steven! I'll have to do a comparison to the UNI-T that I have. What tests would you recommend? BTW, I did ask for the PSG9080 - and I think they are sending me one;)
@@KissAnalog Great, hope you get it! :)
BTW the Uni-T you have has a good user interface (saw a review).
As for tests, an FFT on it's various waveforms for purity might be good. P-P voltages at various offsets also - most are severely limited, and many also go down a LOT at higher frequencies due to output op-amp limits. In fact one of the things that varies a LOT is the output op-amp; i.e. rise/fall time and voltage limits (you saw the crappy rise/fall of that review unit). Some units have ground loop issues, and others have leakage current at high voltage at the output (from suppression cap in PSU). Some, including me, have replaced the PSU. Here is a couple of redesigns from SDG, good channel, but hate his shilling for products so often, which takes away review trust! :(
ua-cam.com/video/ML-lmuHoh-0/v-deo.html
ua-cam.com/video/tpcHh09nb1Q/v-deo.html
for the money its an spectacular product ,,, considering a Areoflex space systems unit leaflet costs more than this unit ( i speak from experience)
LOL You are exactly right!
Junctek? lol, my wife is Chinese and I’ve spent some time there visiting her family. You wouldn’t believe the stuff in English they put on t-shirts and clothes. It’s hilarious.
LOL It would be great for you to send us a pix of one of the T-Shirts;) We can all use a laugh! You gotta give the Chinese credit for trying;) BTW, do they have a sense of humor for their mistakes?
@@KissAnalog I’ll see I can find one I made. They’ll laugh if you tell them what it really says or means.
Is this Better than uni-t
I'll have to do a side by side comparison to answer that;) Thanks for asking!
Have them send you a PSG9080
Thanks for the suggestion! I asked and it is on the way;) Can't wait!!
Hope it's better than the UNI-T UTG962E. The Uni-T was a nice piece of hardware but the software is garbage and not usable on Win-11. I sent mine back the next day.
The host computer software can run normally on win11.
Hey Eddy, when you do things like this could you please set the camera to a fixed point to focus on so that not half your video is out of focus and really annoying to watch.
Thanks for your feedback!
Quiet sure it's China company ... Sounds really fun, have a laugh.
Yes you are right - thank you!!
LOL Junctek. They should at least call themselves, Usablrek.
LOL ;)
Sweet for free. I suspect something is wrong with it
Free is great - if its worthwhile;) Why do you suspect something is wrong with it?
@@KissAnalog yeah. Mine is almost identical but a different brand and without the cheesy decals. That aside, my bnc connectors don't bend like that. I checked the other day. Mine cost alot more too.
I forgot to add I bought mine a year ago and can't find a review for it.
You got a package…. Without opening it… you know it’s a generator?!
LOL It had to be. I didn’t order anything and the last email I received from the people sending it to me said it was on its way.
Learn how to use the equipment before making a review.
Sorry you didn't like the video.