Another DSO+DMM - Zeeweii DSO3D12, claimed 120MHz/250MSps (june 2023)

[Fungus]

Did previous firmwares prevent it?

Well, the previous two did.

I think it needs the serial channel to communicate with the ADC.  They should be able to allow the 5V through.  Maybe add a small socket to it.

I'm powering it off a phone charger so there's no data right now.

[BillyO]

I'm powering it off a phone charger so there's no data right now.

I tried that too.  I think it just senses the power source and keys off that.

[Fungus]

I just did a basic battery life test.

It arrived with 50% charge (nice) so I gave it a full charge.

When the charge light went green I powered it on and left it displaying a sine wave from its own signal generator.

The battery indicator started flashing after ~7 hours and it powered off ~30 minutes later.

Not bad!

[BillyO]

Yup.  You can basically get a full day's work out of it.  More than you can say for a lot of people.

[Fungus]

Yup.  You can basically get a full day's work out of it.

The battery's easy to replace, too, if it starts to lose capacity.

You could probably get a bigger one in there, maybe a 3200mAh 506090 and go for ten hours run time...?

[Fungus]

The voice control cracks me up! 

[BillyO]

The voice control cracks me up! 

Yeah, I had it on one day when my son dropped by and it got real involved in the conversation! 

[motoge]

Voice control is good.　I'm looking at the waveforms on the bike.　I want to see the pulse width.　The pulse period is displayed instead of the pulse width.　I checked with the retailer and they told me it was the pulse cycle.

[BillyO]

It looks like you have your trigger set for rising edge.  You need to set it to falling edge.

Tip: When you take a picture of the screen make sure .. 1) the center of the camera lens is directly in front of the center of the screen, and .. 2) you include the ALL the information on the screen like in the 4th picture.

[motoge]

Thanks for the advice, I appreciate it

There is no photo, but the pulse period is displayed even when the trigger is set to the falling edge.
The fourth photo is the cursor measurement.

I want to measure the pulse width in automatic measurement mode.　

This photo shows the waveform on a different oscilloscope, but the pulse width is displayed using automatic measurement.　　

I checked with the dealer and they said that DSO3D12 displays the HALS cycle.

[BillyO]

I don't know who is telling you what, nor do I know what a KMOON is, but look at the picture below.

A negative going pulse, measuring T-, with trigger set to falling edge.

[Aldo22]

I don't know who is telling you what, nor do I know what a KMOON is, but look at the picture below.

I know what a KKMOON DS0120M is, but...

I checked with the dealer and they said that DSO3D12 displays the HALS cycle.

... what is a HALS cycle?

[motoge]

 この画面はカーソル測定で表示されました。　
トリガーが下降エッジに設定された、T- を測定する負方向のパルスです。
ここはパルス幅で測定されている

[motoge]

HALS サイクルはタイプミス。
ごめんなさい

正しくはパルス周期

パルス周期がDSO3D12で表示される
また、一画面に一パルスでは自動測定モード
では表示されない

[motoge]

I was told that the pulse width cannot be measured.

[BillyO]

この画面はカーソル測定で表示されました。　
トリガーが下降エッジに設定された、T- を測定する負方向のパルスです。
ここはパルス幅で測定されている

Translation:

This screen was displayed with cursor measurement.　
It is a negative going pulse that measures T- with the trigger set on the falling edge.
This is measured by pulse width

My Japanese might be a bit rusty, but if you take a better look at the screen I presented you will see both the auto and the cursor agree.  In you measurement the trigger voltage was not set low enough and was set in an area where there could be confusion caused by noise and ringing.  The scope is quite capable of doing what you want.

Please post in english.  If you have problems expressing yourself in English use Google translate.  The Japanese to English translation is quite good.

[BillyO]

I was told that the pulse width cannot be measured.

Well, it can.  I showed it can.  Not sure what that correspondence is about.

It can even measure duty cycle (+ or -).

[motoge]

　thank you so much
"The trigger voltage is not set low enough." Thanks for this tip。

Try lowering the trigger voltage.

tnks

[Fungus]

I was told that the pulse width cannot be measured.

Not true.

Here's mine showing duty cycle and high/low time on a pulse wave:

[motoge]

Thanks for any advice
T-352ms is understandable　．　It's the width of the lower recess.　

In my settings, it will be the width of the red arrow.
The display shows T-80.0ms. It should be around 18 ms?

Furthermore, data is not displayed in one waveform per screen mode.

I'm a beginner, thanks for any advice

アドバイスをありがとう
T-352msは理解できます。下側凹部分の幅ですよね
私の設定では赤矢印の幅になってしまいます
T-80.0msの表示です　本来は18msぐらい?

さらに１画面１波形ではデータが表示されません
　私は初心者です、アドバイスをありがとう

[motoge]

The waveform I want is something like this:
T-21．6ms display is good
The second photo is also T-22.0ms, very good

I would like to check the waveforms of motorcycle injection and ISCV.





私が希望する波形はこんな感じです
T-21．6ms表示は良いです

２枚目の写真もT-22.0ms とても良いです
バイクのインジェクションゃ゜ISCVの波形を診たいです

[Fungus]

Looks like the 'scope is seeing this:



Which is reasonable.

So you can't measure that signal (which isn't a pulse wave) without using cursors.

[motoge]

Thanks for the advice
We have now requested ZEEWEII to ensure that the pulse width measurement and screenshot numbers do not overlap with the cursor geodetic.






アドバイスありがとう
現在ZEEWEIIにパルス幅の測定とスクリーンショットの
番号がカーソル測地に重複しないよう要請しました。

[BillyO]

Thanks for any advice
T-352ms is understandable　．　It's the width of the lower recess.　

In my settings, it will be the width of the red arrow.
The display shows T-80.0ms. It should be around 18 ms?

Furthermore, data is not displayed in one waveform per screen mode.

I'm a beginner, thanks for any advice

アドバイスをありがとう
T-352msは理解できます。下側凹部分の幅ですよね
私の設定では赤矢印の幅になってしまいます
T-80.0msの表示です　本来は18msぐらい?

さらに１画面１波形ではデータが表示されません
　私は初心者です、アドバイスをありがとう

I see what you are saying.  That's a 3 level signal so it may be confusing the software, but you are right.  The T- should be ~18ms instead of the entire signal period.

[motoge]

 
Thank you for your understanding．　
I have now asked Zeeweii to fix DSO3D12.
I look forward to the next firmware update.
I would be happy if it turned out like this picture


色々理解していただいてありがとう
現在Zeeweii にDSO3D12の修正?を依頼しました
次回のファームUPに期待します
この写真の様になると嬉しいです
　「T-: 21.6ms」