Products > Test Equipment

Rigol DHO804 Test and Compare Thread

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core:
Hardware it's the same as HDO4000.
I think it's a matter of hacking.

ebastler:

--- Quote from: core on November 17, 2023, 12:56:15 pm ---Hardware it's the same as HDO4000.

--- End quote ---

I don't think so. The DHO4000 has dual ADCs twice the sample rate too, and active probe interfaces.

core:

--- Quote from: ebastler on November 17, 2023, 01:00:09 pm ---
--- Quote from: core on November 17, 2023, 12:56:15 pm ---Hardware it's the same as HDO4000.

--- End quote ---

I don't think so. The DHO4000 has dual ADCs too, and active probe interfaces.

--- End quote ---


There is a teardown on Dave's Youtube channel, the input stage is the same. Even the 50 ohm path is there.

Antonio90:

--- Quote from: ebastler on November 17, 2023, 12:51:39 pm ---
--- Quote from: Antonio90 on November 17, 2023, 12:33:57 pm ---You also get internal 50 Ohm termination.

--- End quote ---

Are you sure? I don't think the DHO1000 has that; the DHO4000 might.

--- End quote ---

Well, not really, as I haven't read the datasheet or manuals, but the images on Rigol.eu say so.

ebastler:

--- Quote from: Antonio90 on November 17, 2023, 01:02:34 pm ---
--- Quote from: ebastler on November 17, 2023, 12:51:39 pm ---
--- Quote from: Antonio90 on November 17, 2023, 12:33:57 pm ---You also get internal 50 Ohm termination.

--- End quote ---

Are you sure? I don't think the DHO1000 has that; the DHO4000 might.

--- End quote ---

Well, not really, as I haven't read the datasheet or manuals, but the images on Rigol.eu say so.

--- End quote ---

It looks like they have dropped this feature late in the game. There's no mention of 50 Ohm inputs in the datasheet. And while the manual has a section on "Selecting the input impedance", all that section says is that there's a fixed 1 MOhm impedance only. (But then there is a leftover sentence in the section on AC/DC setting stating that 50 Ohm impedance always forces DC coupling...)

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