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?