Products > Test Equipment
Rigol HDO1000 and HDO4000 12bit oscilloscopes launched in China
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core:

--- Quote from: ebastler on December 06, 2023, 06:09:53 pm ---
--- Quote from: core on December 06, 2023, 05:49:40 pm ---Also, some pictures for StairUp signal, 6mVpp, 1MHz. Acquisition normal, HiRes 14 bit (50MHz BW), HiRes 16 bit (BW 25MHz).
Generator SDG2042X.

--- End quote ---

So the reduced bandwidth in 14 and 16 bit mode is independent of the sampling rate? The 50 and 25 MHz you state for your data, taken at 2 GSa/s, are the same as what ZhuraYuk quoted, for measurements taken at only 50 MSa/s.

I would have thought that they need to reduce the bandwidth if the base sampling rate is already low, to account for the averaging/interpolation/whatever needed to get the extra bits. But if you start with 2 GSa/s, shouldn't there be enough headroom to get higher resolution without sacrificing bandwidth right away?

--- End quote ---

For the moment I can't find an advantage for 14 or 16 bit, and where I can use them. I loose significant BW and details in low level signal.
The normal acquisition mode seems to be just fine.
ZhuraYuk:

--- Quote from: core on December 06, 2023, 07:13:41 pm ---Strage, we have to see an DHO1072 inside and compare with 1074 regarding the input stages.
If are the same, it can be a matter of luck regarding the cips installed.

Both channels have the same level of 23uV noise ?

--- End quote ---

Ch1 23uV Ch2 21uV.  I see in your screenshot the channels have some slight dc offset where mine do not have that. I wonder if this is because of the firmware version or bad self calibration, I have 2.12.
core:

--- Quote from: ZhuraYuk on December 06, 2023, 07:21:46 pm ---
--- Quote from: core on December 06, 2023, 07:13:41 pm ---Strage, we have to see an DHO1072 inside and compare with 1074 regarding the input stages.
If are the same, it can be a matter of luck regarding the cips installed.

Both channels have the same level of 23uV noise ?

--- End quote ---

Ch1 23uV Ch2 21uV.  I see in your screenshot the channels have some slight dc offset where mine do not have that. I wonder if this is because of the firmware version or bad self calibration, I have 2.12.

--- End quote ---

I'm still testing it with the old version because I'll try to have a reference when I will update.

Where did you found the v2.12 ?
On line I see only 2.11

Anyway, you must calibrate after each update. The dc offset will be improved, but regarding the noise level I don't know.
And it's not a such big difference, even 23uV it's better than almost any scope on the market.

There are other things that are not very good (at all ...) on Rigol scopes, like FFT. And I have some questions regarding the trigger stability and serial decoders.
ZhuraYuk:
2.12 firmware is here in firmware section https://int.rigol.com/products/detail/DHO1000

Did anyone had protective film on the display of their DHO1000/4000 ? Mine come without it.
egonotto:

--- Quote from: core on December 06, 2023, 05:49:40 pm ---Indeed, noise level is very low.

1mV/div, 2 channels, 50 Ohm terminators on inputs, BW 20MHz / 200MHz, memory auto / max.
For me ch 1 have the highest bias, and ch 4 the lowest.


--- End quote ---

Hello,

Can you please make the measurements with 1 V/div instead of 1 mV/div?

Best regards
egonotto
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