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#325 Reply
Posted by
tttonyyy
on 10 Jun, 2021 22:23
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Check the attached pic. All the steps are exactly at the same Y position. I counted a total 40 vertical steps for the 8 vertical divs.
It would be ok-ish if at least, when zooming out the voltage, you could see the whole signal.
But saturating the signal in 2mV mode and going back to 5mV, you get a square signal of 4 divs. That means the signal was clipped to 200mV.
200mV would be 10 vertical divs in 2mV mode, which would make a total of 50steps and just 5.6 bits resolution.
I think I'll return this crap!
When I try that I don't see the same jagged stepped output (see attached) - what do you get in dots rather than vector mode? What s/w f/w versions are you using?
I do see the same clipping on saturation, though.
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#326 Reply
Posted by
DavidAlfa
on 10 Jun, 2021 22:39
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Wtf, yours is a lot better! Will look into this. Mine is FW3000, running 20210416 SW.
Edit: It seems it was a calibration issue. Ran calibration again and it got much better! Not so angry now haha
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#327 Reply
Posted by
tautech
on 11 Jun, 2021 00:04
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Check the attached pic. All the steps are exactly at the same Y position. I counted a total 40 vertical steps for the 8 vertical divs.
It would be ok-ish if at least, when zooming out the voltage, you could see the whole signal.
But saturating the signal in 2mV mode and going back to 5mV, you get a square signal of 4 divs. That means the signal was clipped to 200mV.
200mV would be 10 vertical divs in 2mV mode, which would make a total of 50steps and just 5.6 bits resolution.
I think I'll return this crap!
When I try that I don't see the same jagged stepped output (see attached) - what do you get in dots rather than vector mode? What s/w f/w versions are you using?
I do see the same clipping on saturation, though.
I'd be far more worried about the triggering as the trigger points in that image ^ don't line up with the waveform.
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#328 Reply
Posted by
QuitButton
on 11 Jun, 2021 10:05
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I tried the same thing.
No, you tried with 4k capture buffer. Try with 4M and a signal on both channels. That's where it showed for me.
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#329 Reply
Posted by
imk
on 11 Jun, 2021 11:01
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My final words for a while re my DSO2D10 issues.
I just sent letter to David Hoo Sales Manager Hantek, China 266114
With copy to BangGood who i am very happy with, but they need to know about these Hantek problems.
As hopefully BangGood will stop selling Hantek products, along with all other Hantek distributers and it two years Hantek will be little more than a bad memory!
Imk
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#330 Reply
Posted by
Piton
on 11 Jun, 2021 11:43
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After overclocking, it became worse for me - it freezes constantly, and the amplitude of the generator increased by 25%. After removing the overclocking and flashing the platform, the amplitude did not change. How do I calibrate it now? But at what point it increased - I can't say for sure, perhaps before overclocking, but after the hack it was normal.
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#331 Reply
Posted by
tttonyyy
on 11 Jun, 2021 12:26
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Try with 4M and a signal on both channels. That's where it showed for me.
Just tried with 2 channels, 4Mpt @ 125MSa/s and that also looks fine. Did crash the scope a few times getting there though.
Firmware 3200 s/w 20210416.00
I'd be far more worried about the triggering as the trigger points in that image ^ don't line up with the waveform.
The triggering on these scopes is pretty abysmal for anything other than a sharp rising or falling edge.
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#332 Reply
Posted by
SimonM
on 11 Jun, 2021 14:15
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My final words for a while re my DSO2D10 issues.
I just sent a letter to David Hoo Sales Manager Hantek, China 266114
With a copy to BangGood who I am very happy with, but they need to know about these Hantek problems.
As hopefully BangGood will stop selling Hantek products, along with all other Hantek distributers and in two years Hantek will be little more than a bad memory!
Imk
Good for you.I have been enthusiastic about the DSO2D15 for seven days but I have absolutely lost my patience with it and it is going back to Amazon. They ask what is wrong in just a few words, my summary (did I miss anything?): "Scope issues: often loses sync between AWG, scope & Hantek's probes. Input is very noisy. The calibrated channel has DC offset. Scope hangs using knobs e.g. turn off/on [again]. Protocol decoding unreliable".
Simon
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#333 Reply
Posted by
QuitButton
on 11 Jun, 2021 14:50
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So this thread now becomes...
sds1202x-e OR ds1202z-e OR...
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#334 Reply
Posted by
Algoma
on 11 Jun, 2021 14:58
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With the price of these DSO2X1X Series rising, Hantek best fix their software right. Considering OWON and FNIRSI have already put out their competing scopes on a similar platform / market.
Although more basic build quality (and matching price advantage), OWON and FNIRSI's software appears to actually work well enough for the entry level functions, Compared to the basic things that Hantek seems to struggle with maintaining in their software. I still feel Hantek has the most potential hardware wise (especially reading the datasheets for the chips they used), they really need push harder to fix their software.
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#335 Reply
Posted by
dmulligan
on 11 Jun, 2021 15:03
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It's too bad Hantek isn't willing to open source the software for this DSO. Imagine what the development community could do with it.
I know it's not as easy as my statement makes it sound but it would probably be easier than the way they are going at it now.
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#336 Reply
Posted by
imk
on 11 Jun, 2021 15:26
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My final words for a while re my DSO2D10 issues.
I just sent a letter to David Hoo Sales Manager Hantek, China 266114
With a copy to BangGood who I am very happy with, but they need to know about these Hantek problems.
As hopefully BangGood will stop selling Hantek products, along with all other Hantek distributers and in two years Hantek will be little more than a bad memory!
Imk
Good for you.
I have been enthusiastic about the DSO2D15 for seven days but I have absolutely lost my patience with it and it is going back to Amazon. They ask what is wrong in just a few words, my summary (did I miss anything?): "Scope issues: often loses sync between AWG, scope & Hantek's probes. Input is very noisy. The calibrated channel has DC offset. Scope hangs using knobs e.g. turn off/on [again]. Protocol decoding unreliable".
That about sums it up for me, unreliable, software full of bugs, unresponsive Hantek support.
Interesting is when i initially complained they had a fix in two days, makes me think they new about the problem and had a bodge ready for those that reported the issue!
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#337 Reply
Posted by
imk
on 11 Jun, 2021 17:39
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#338 Reply
Posted by
SimonM
on 11 Jun, 2021 18:10
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Simon,
I asked same question Siglent or Rigol https://www.eevblog.com/forum/testgear/siglent-sds1202x-e-or-rigol-ds1202z-e/new/?topicseen#new
I think my money is on the https://siglent.co.uk/product/siglent-sds1104x-u-4ch-100mhz-1gsa-s-14mpts-super-phosphor-oscilloscope/
Plus chk out eevblog reviews and you'll find a video on it that it not too damming
But i am going to wait a week to see what Hantek does, as i think my returning it door has closed due to waiting for Hantek support.
Hi Ian
Good luck with extending the returns window. My eyes are open to buying through the company you bought the scope through. So I'm following your story with interest. How you get on may determine how I shop in the future.
I think you could argue that you started the process of determining what was wrong with Hantek early and you did it politely too. Getting a resolution from the company also helps the company you bought it from because sending it back ultimately costs them money and they work on small enough margins. They should not be penalized for something they have limited control over.
You are giving Hantek an opportunity to fix things before you invoke a returns clause. It is not your fault if they dither or throw up a smokescreen in the hope that you will quietly accept the product ASIS.
I'm going to sign off on this topic/thread and move across to your thread. I have some links you may find interesting. With hindsight, I could have observed that issues with Hantek have been known for six months and the old Hantek 5000 series of products has not been successfully replaced with the 2000 series for home/hobbyist/enthusiasts who want good quality at a reasonable price. The price may be reasonable but there are two sides to this...
Hantek was a bit mean in only providing one probe. I bought a second Hantek probe to complement their scope - no surprises etc. I actually quite like the probe but I also think it is responsible for some noise issues and I will request a return to Amazon. I'm not clever enough to be able to distinguish issues between AWG, Hantek scope, and Hantek probes.
The promised replacement for the duff probe didn't materialize. The cynic in me makes me think that this is a ploy to delay returning the product until it is outside of a returns window. With good customer service I could forgive some minor issues but alas the walk and the talk don't coincide.
I can return a product that is obviously broken e.g. damaged. It is much harder to admit that one's own judgment was swayed by the promise of something that appeared to be "too good to be true". Of course, I didn't have any knowledge or experience of the products before buying, I should have been more diligent. Lesson learned.
Simon
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#339 Reply
Posted by
DavidAlfa
on 11 Jun, 2021 18:30
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I also opened a claim in Aliexpress. Conditions were clear, 15 days free return.
Since the products is unreliable, that's more like a warranty than a "I don't like it".
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#340 Reply
Posted by
Piton
on 11 Jun, 2021 18:54
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If the problems are minor, or you don't like something about the oscilloscope, it is easier to sell it than to return it back. In case of serious problems, there is only one way out - return. I had a sad experience of returning, I no longer want to repeat. In general, it works fine for me, hangs are only in the automatic measurement mode when the signal amplitude drops to zero, or when the cable is pulled out and then connected.
I returned my native memory, updated the hack and the amplitude of the generator was restored. I suspect that the reason was still overclocking.
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#341 Reply
Posted by
tttonyyy
on 11 Jun, 2021 20:44
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I'd be far more worried about the triggering as the trigger points in that image ^ don't line up with the waveform.
I've emailed Hantek to ask about triggering and sent them the attached "single seq" trigger as an example of how bad it can be. Will see what they say.
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#342 Reply
Posted by
imk
on 11 Jun, 2021 21:28
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#343 Reply
Posted by
tautech
on 11 Jun, 2021 21:33
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So this thread now becomes...
sds1202x-e OR ds1202z-e OR...
OR SDS1104X-U !
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#344 Reply
Posted by
imk
on 11 Jun, 2021 21:55
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Hello tautech, I see NZ is awake, Saturday morning lay in over and breakfast on the table :-)
Ya i think the SDS1104X-U looks about best bang for buck up here, what is scope shopping like in NZ
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#345 Reply
Posted by
tautech
on 11 Jun, 2021 22:20
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Hello tautech, I see NZ is awake, Saturday morning lay in over and breakfast on the table :-)
Ya i think the SDS1104X-U looks about best bang for buck up here, what is scope shopping like in NZ
PM returned and my advice is to get one locally.
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#346 Reply
Posted by
DavidAlfa
on 11 Jun, 2021 22:29
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And don't ever make single shot, and then slighly zoom the voltage in.
I got confused, wasn't sure about what I was seeing, bathroom tiles or a waveform!
A slow cpu, not the best ADC frontend, laggy response... all that is completely acceptable for the price.
It's their software what sucks. I was trying to figure out the noise in an audio signal. No way, the waveforms are thick as car battery wires!
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#347 Reply
Posted by
tttonyyy
on 12 Jun, 2021 03:04
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I was trying to figure out the noise in an audio signal. No way, the waveforms are thick as car battery wires!
Did you try HF reject or any of the other acquire options?
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#348 Reply
Posted by
DavidAlfa
on 12 Jun, 2021 09:14
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Yes. Not a big difference.
Doing the average of 128 did a little better, but that will filter the signal, removing the real noise.
If you make a single shot, them zoom in 2-3 timesteps, you stretch the timebase with the same samples, so you get a clean, sharp waveform, although lacking precision.
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#349 Reply
Posted by
Gerasim
on 12 Jun, 2021 12:30
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