New Zoyi multimeter+oscilloscopes - ZT-70xS, up to 50MHz/250MSps (nov 2022)

[tol]

It does give a couple years of more software support so there is a small chance they get their sh*t together eventually and fix the bugs 

Or they just took the Fnirsi production policy: when users start to say that some device is buggy, the producers just abandon it and release a new device, basically as buggy as the previous one, but as it's new, the users can hope that it will be better than the previous one. It's a never ending story of rapid good sales of bad products I think it works because these products are cheap. A user can buy one trusted device made by a respected company or 10 devices like this and "enjoy" something that kind of works (but  it may be enough though for some simple applications). To say the truth, I would be satisfied with 703 if the trigger could work every time it should, but for some reason they cannot fix it. I don't think that this is a hardware problem, it is surely software problem, so if they cannot fix it now and start to sell a new device, I wouldn't expect any stable and predictable work from it... Or there is a little chance that they finally found good programmers who said something like "we will not fix this 703 cr@ppy firmware, let's start a completely new firmware for a new device". But I said that the chance of it is very little because a screenshot posted a few pages above shows 706 with exactly the same UI as 703 has, so maybe they slightly changed the hardware, but it looks like the firmware remains the same, just slightly adapted for the new hardware stuff.

[Skander]

Yeah I will wait for reviews and see if problems are fixed before buying any of their products again. Otherwise I'll filter them out going forwards like Fnirsi.

An update on the AliExpress return process as promised; the moment the return package was scanned in transit, AliExpress processed an "advance refund" without the stated inspection and other nonsense.

[tol]

AliExpress processed an "advance refund" without the stated inspection and other nonsense.

The inspection is needed because some unfair users return a bag with sand inside, so they keep the device and get the refund at once, and the seller looses both the device and the money. According to your screenshot, you could also do the same, but only once

[dn1983]

Strange version of firmware is appeared on official web site:
ZOYI-703S-FW-V1612.ZTK.ztk_tmp

V164 Version Upgrade details::

Fixed the issue of automatic restart of waveform saving in V1.6.3

V1612 Version Upgrade details::

Improve cursor triggering issues

[dn1983]

I've noticed, that beginning from version 1.6XX, line of signal is above zero.

[Skander]

I've noticed, that beginning from version 1.6XX, line of signal is above zero.
(Attachment Link)

I noticed this on my unit as well as it shipped with 1.64.
I tried the calibrate option but the outcome was the same, above zero.

I don't have the unit anymore to test the just released firmware.

[dn1983]

I don't have the unit anymore to test the just released firmware.

You can downgrade your firmware to the version 1.57 for example, and signal level will be OK.

[xfint34]

Running a calibration on mine reset the voltage back to zero. I ran it on 1.6.12.

I had both channels enabled when starting the calibration. I remember someone mentioned to do this.

[Skander]

Running a calibration on mine reset the voltage back to zero. I ran it on 1.6.12.

I had both channels enabled when starting the calibration. I remember someone mentioned to do this.

Yeah I enabled channel 2 as well for the calibration on mine, didn't fix it for me on 1.6.4; so this is probably a bugfix in 1.6.12! 

[Payne]

Talking about the multimeter part of the ZT-703s, there is a warning about which terminals to use when you are going to measure current - actually the warning should be when you press the button to measure voltage, because, you know, measuring voltage when the probes are inserted in "mA" or "A" terminals is not good

I have version v.1.4.2

[Skander]

Talking about the multimeter part of the ZT-703s, there is a warning about which terminals to use when you are going to measure current - actually the warning should be when you press the button to measure voltage, because, you know, measuring voltage when the probes are inserted in "mA" or "A" terminals is not good

I have version v.1.4.2

I think they actually added that due to the issue of erroneous readings when mA is selected and leads are in A and vice-versa.

[Payne]

Tried out the ZOYI-703S-FW-V1612.ZTK.ztk_tmp FW version for a couple of hours - until now I find it the best version, hope when it is not TMP any longer, it will be even better.

Trigger seems working, also below 500nsec, but still at times some general strange behavior, which is difficult to relate to something

Just noticed, it is not .tmp any longer!

Still some hiccups when in rolling mode (with an exact frequency of 0.65Hz = one hiccup per. 1.54sec --- very strange)

Sometimes, the trigger does not catch a pulse (NORMAL mode), even the repeat rate is 1Hz or slower. I guess the controller is doing something else the moment the pulse edge occurs, but still the most important thing must be to be armed for triggering. I just wonder, what it is doing - nothing is going on, it just should be focusing on the trigger! Maybe it is that 1kHz signal running in the background that needs attention, the moment the pulse edge occurs, so the controller does not see it

[tol]

Tried out the ZOYI-703S-FW-V1612.ZTK.ztk_tmp FW version for a couple of hours - until now I find it the best version

Yeah, there are still some bugs remained, but the trigger became more predictable than in previous versions. It may still skip signals, but at least if it catches a signal, it is shown in the correct position. I think I'll keep this version. The strange waving to the bottom of the screen in 2 last zoom levels is still there sometimes (not all the time). I did not test it completely, but I think it's not as bad as the previous versions were.

[atarian]

I've noticed, that beginning from version 1.6XX, line of signal is above zero.
(Attachment Link)

I have same issue. Moreover, I have now realized I can not perform auto calibration, it always fails with "Check failed" message.

[mebel]

Try to reset to default.

[4lfre1re]

I have same issue. Moreover, I have now realized I can not perform auto calibration, it always fails with "Check failed" message.

Try to enable both chanels before calibrate...

Regards... ;-)

[Payne]

I have same issue. Moreover, I have now realized I can not perform auto calibration, it always fails with "Check failed" message.

Try to enable both chanels before calibrate...

Regards... ;-)

Exactly, it is just strange that Zoyi does not enable both channels automatically when you make the calibration - Zoyi had 10 or more firmware updates to make this small improvement, which bother so many people - but still same problem. Somehow they must be aware of the issue - if they ever read eevblog.com. But why not just do it? - When selecting "default setup" it is no problem to enable both channels

[Svet Nezrim]

Hello. I accidentally discovered a custom firmware for the Zoyi ZT-703S on GitHub.
https://github.com/kmikl/open-zt703

[maxmatteo]

Hello. I accidentally discovered a custom firmware for the Zoyi ZT-703S on GitHub.
https://github.com/kmikl/open-zt703

its already known (check this thread), but unfortunately the guy did not continue to work on it. i am also not getting any response from him anymore via pm.

would love to support this somehow. cheap opensource scopemeter would be a dream.

max

[indman]

Hello. I accidentally discovered a custom firmware for the Zoyi ZT-703S on GitHub.
https://github.com/kmikl/open-zt703

Yes, there was a very high hope that the device would get a new life with custom firmware and the results were impressive. But, alas, the author disappeared. :'(

[Svet Nezrim]

Hello. I accidentally discovered a custom firmware for the Zoyi ZT-703S on GitHub.
https://github.com/kmikl/open-zt703

its already known (check this thread), but unfortunately the guy did not continue to work on it. i am also not getting any response from him anymore via pm.

would love to support this somehow. cheap opensource scopemeter would be a dream.

max

Sorry, I didn't know that. It's a shame the project wasn't continued.

[GnatGoSplat]

Sorry, I didn't know that. It's a shame the project wasn't continued.

I'm not seeing any concrete evidence it was even started.  There's no source there at all.

[Atlan]

He didn't publish it.

[igoreksas]

The ZEEWEII DSO154Pro has a very convenient feature: when you press and hold the AUTO button for a couple of seconds, continuous auto-synchronization mode is activated, which means that you can measure in places with different signal shapes, frequencies, amplitude, and it automatically adjusts itself all the time, or, for example, the source changes the signal shape, frequency, amplitude, etc. on the fly, and the oscilloscope constantly adjusts itself without user intervention. This function is called RTAuto.

Does the 703s have this function, and if so, how do you enable it?

[xKertx]

Does the 703s have this function?

No.