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

[BillyO]

The SMA connector is designed for at least 12GHz and  50 Ω impedance, so should be OK for this application.

Did you verify that the generator output is 50 ohms?

[Dave_g8]

Hi Bill,
I don’t have a DSO3D12, but the AWG output circuit is probably similar to that on the other models.

The DSO154Pro output circuit appears to be as shown below. The nominal output impedance will be closer to 150Ω, this may have been chosen to provide some level of short circuit protection for the driver.

[Dave_g8]

Interesting, there is a recent firmware upgrade for the DSO3D12 which adds a frequency meter and pulse counter.

This appears to be a similar specification to the feature found on the DSO154Pro (HW V1.4). The DSO3D12 seems to have a higher upper frequency limit.

It may be that the feature on the DSO154Pro is also HW/FW dependant, since this seems to be the case for the DSO3D12.



A thread describing the DSO154Pro frequency meter and counter is shown below.
https://www.eevblog.com/forum/testgear/new-toy()-scope-dso154pro-1ch-claimed-40mss/msg5418215/#msg5418215

[jarpo]

Interesting, there is a recent firmware upgrade for the DSO3D12 which adds a frequency meter and pulse counter.

This appears to be a similar specification to the feature found on the DSO154Pro (HW V1.4). The DSO3D12 seems to have a higher upper frequency limit.

It may be that the feature on the DSO154Pro is also HW/FW dependant, since this seems to be the case for the DSO3D12.

(Attachment Link)

A thread describing the DSO154Pro frequency meter and counter is shown below.
https://www.eevblog.com/forum/testgear/new-toy()-scope-dso154pro-1ch-claimed-40mss/msg5418215/#msg5418215

Do you know if this new firmware is also available for hardware version V1.1 and firmware version v1.1.2? ZEEWEII appears to say that it has recently upgraded the DSO3D12 hardware, but does not provide any further information on its website.

[Dave_g8]

Hi,
Sorry, I don’t have any further information. The screenshot in the previous message is from one of the files in the firmware download when you click the icon on the website.
Perhaps ask the question via the “contact us” page.

[BillyO]

Do you know if this new firmware is also available for hardware version V1.1 and firmware version v1.1.2? ZEEWEII appears to say that it has recently upgraded the DSO3D12 hardware, but does not provide any further information on its website.

If your current FW version is 3.0.0_III or 3.0.1_III then you have the correct HW version for the new FW.