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

[apollo11fan]

OK, this is extremely helpful. I hadn't tried a single scan w/trigger. I like it. Thank you.

So, one thing that would be helpful is a display top/left? of the actual time post-trigger that is being displayed as the trace is scrolled back and forth.

When it is scrolled back and forth, it would be great if:
           There was a cursor marking the delta time since the trigger or perhaps the beginning of capture (configurable), and
           Wrapping around the trace as it is scrolled? I think there should be a feature setting to turn that on/off.

[csuhi17]

Normally, the manufacturer should set a limit, Owon does not allow you to scroll any further, if you set the time base higher, you only see the signal in the memory, and next to it an empty field on two sides.
This is not a user error, but a Zoyi bug.

[apollo11fan]

FWIW - if there is someone looking to get some basic background information on Oscilloscopes, this Tektronix guide is free for downloading
https://download.tek.com/document/03W_8605_7_HR_Letter.pdf

[xfint34]

The currently selected cursor line disappears when time division is >= 200ms. It makes the cursor useless since I can't see where I'm trying to position it. The bug exists back to at least firmware 1.3.2.

[xKertx]

I wanted to use the Rigol PVP3150 150MHz probe with this scope because it has 20MHz bandwidth in 1X mode and i thought it would be good for low voltages.
And while it seems to have much less noise, for some reason in 10X mode it shows annoying overshoot at the edges and the compensation adjustment wont help much.
The compensation kind of works, but the spike at the beginning remains no matter whitch position i turn the compensation screw.
Any ideas what could cause this?
I would have thought that a probe, that costs almost as much as this oscilloscope, would perform flawlessly. But atleast in this case the cheap probe that came with the scope works better.
Or, does it have something to do with the fact that the more expensive Rigol probe probably has lower capacitance and the cheap probe is somehow matched with the scopes input capacitance?
On the screenshot the CH1 is the probe that came with the ZT-703s and CH2 is the Rigol PVP3150.

[nikbry]

FWIW I just tested with the only other probes I have that came with my Owon VDS1022i USB scope and they work just like the Zotek one. The Owon has a similar bandwidth spec, so I assume the probes are similarly specd.

[csuhi17]

Or, does it have something to do with the fact that the more expensive Rigol probe probably has lower capacitance and the cheap probe is somehow matched with the scopes input capacitance?
On the screenshot the CH1 is the probe that came with the ZT-703s and CH2 is the Rigol PVP3150.

Yes, there are some that cannot be compensated with it, I did this with the Fnirsi scope, I could not compensate with the factory one, and I had to sacrifice one of the Owons.

I tried a few that were at hand, and the Owon 350MHz undercompensates, the Rigol PVP2350 is good for me and other noname too.

He also writes the compensation value on his data sheet. for PVP2350 is from 6pF to 24pF.

[Wintel]

ZT-703S Firmware v1.42

Added FFT function.

http://download.s21i.faiusr.com/8164272/0/0/ABUIABAAGAAgw8y4twYo5syA0wE?f=ZOYI-703S-9-19%E6%9C%80%E6%96%B0%E5%9B%BA%E4%BB%B6FW-V142.ZTK&v=1726883395

[bebopdk]

Link is dead.

[jellytot]

copy and pasted link in new window worked for me! Initial thoughts are it seems to be improved, triggering, stability, etc..

[bebopdk]

 :-+Thanks, that did the trick...

[csuhi17]

The generator function is stuck for me.
Same with the previous firmware.

OutPut is set to square wave, the three parameters for each ---
When I go to MoreAPPs->GEN, it is active.
I can't turn it off, if I change one of the parameters, it always goes back to sine after i exiting and entering again.
Version V1.0.1.
Has anyone had a similar problem, did you manage to fix it?

[nikbry]

The generator function is stuck for me.
Same with the previous firmware.

OutPut is set to square wave, the three parameters for each ---
When I go to MoreAPPs->GEN, it is active.
I can't turn it off, if I change one of the parameters, it always goes back to sine after i exiting and entering again.
Version V1.0.1.
Has anyone had a similar problem, did you manage to fix it?

Not sure I understand....here's how it works for me:

When I press Menu I have two ways of generating a signal: 1) Output Setting 2) More Apps Enter/GEN. I think they are completely separate. Option 1) let's you use the scope simultaneously, option 2 doesn't.

When I use More apps/GEN, with the up down cursor I choose the waveform, pressing Menu switches the output ON/OFF, and F1 through F4 and left right cursor change the parameters. To exit the GEN mode I need to press the MODE button and the signal generation stops.

I'm on FW 1.32 GEN V 1.0.1

Not sure if this answers your question!?

[csuhi17]

Yes, thank you.
I didn't even dare to think that the signal generator part only works separately, I've watched videos and reviews of many cheap scopes, but so far this is the first one where you can't check the signal of the signal generator with its own scope.
Apart from the OutPut setting on the scope part, which in turn limits the properties of the scope.

I don't remember that this thing was mentioned in the comments, that is, that the scope and the GEN app do not work at the same time.
Then I'm happy, it's not that my device is defective.

[lchao]

Hi, I've recently put my hand on an XEAST XE703S, which is just another rebranded version of the ZOYI dual channel scopemeter.
Specs, description and EN manual: https://www.xeastek.com/xeast-thermal-imager-for-hunting-xe-c18-c19-day-night-aiming-lens-outdoor-adjustable-focus-clarity-lens-infrared-thermal-camera-1709356654564356.html

It came with the v1.3.8 firmware (APP) and v1.0.16 BOOT.

It was a real bargain for ~50 USD (with 2 probes, incl shipping) as a special offer on TEMU, thanks to Electronics Repair School YT channel .

V1.4.2 FW is also available from here: http://www.szzotek.com/h-col-159.html (stay on the China version and use translator). But I couldn't find release notes.

[RAPo]

Thanks. The update went smoothly.
Only when problem when no signal on channel 1, pressing auto set the trigger to channel 2 even when that channel is off.

copy and pasted link in new window worked for me! Initial thoughts are it seems to be improved, triggering, stability, etc..

[jellytot]

Thanks. The update went smoothly.
Only when problem when no signal on channel 1, pressing auto set the trigger to channel 2 even when that channel is off.

copy and pasted link in new window worked for me! Initial thoughts are it seems to be improved, triggering, stability, etc..

Have you set "Trig Source" from the menu ?

[RAPo]

yes.

Have you set "Trig Source" from the menu ?

[jellytot]

yes.

Have you set "Trig Source" from the menu ?

Ok. It's Working fine for me. Maybe a factory reset would help?

[csuhi17]

It's the same for me.
With active CH1 and inactive CH2, the source of the trigger is CH1.
There is no signal on either input and I press AUTO, then the trigger source switches to CH2.
If I press the MENU button and use the arrow to navigate to where I can set the trigger source, it switches back to CH1 automatically.
a little interesting, but not a big deal.
If I noticed correctly, AUTO now places it in the middle like the two channels, and you can finally see the signal in normal size, you don't need to adjust it.

[nikbry]

It's the same for me.
With active CH1 and inactive CH2, the source of the trigger is CH1.
There is no signal on either input and I press AUTO, then the trigger source switches to CH2.
If I press the MENU button and use the arrow to navigate to where I can set the trigger source, it switches back to CH1 automatically.
a little interesting, but not a big deal.
If I noticed correctly, AUTO now places it in the middle like the two channels, and you can finally see the signal in normal size, you don't need to adjust it.

Are you saying Auto Range works well now?

[RAPo]

No auto doesn't work well. See the image. And it is slow. You can see on the screen that it is running over the V/div settings very slowly.

[indman]

No auto doesn't work well. See the image. And it is slow.

Slow and clumsy - these are the definitions of oscilloscope operation, which are the most suitable for ZT-703S.
The space of the large display is not utilized at all efficiently. The windows with measurement results only interfere with the normal perception of the signal. In general, after a long enough use of this device as an oscilloscope my opinion - slow, inconvenient, unpleasant. Unlike a multimeter, which is really convenient to use.

[nikbry]

No auto doesn't work well. See the image. And it is slow. You can see on the screen that it is running over the V/div settings very slowly.

Is this with FW 1.42?

[nikbry]

No auto doesn't work well. See the image. And it is slow.

Slow and clumsy - these are the definitions of oscilloscope operation, which are the most suitable for ZT-703S.
The space of the large display is not utilized at all efficiently. The windows with measurement results only interfere with the normal perception of the signal. In general, after a long enough use of this device as an oscilloscope my opinion - slow, inconvenient, unpleasant. Unlike a multimeter, which is really convenient to use.

What are you comparing it to, to have such a negative opinion?