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

--- Quote from: Njk on August 01, 2024, 11:09:01 am ---What's terribly wrong with that scopes at the time?

--- End quote ---

A very slow "recording" mode with abysmal waveform (trigger) rates comes to mind, which Rigol have apparently tried to gloss over with the "UltraAcquire" mode for better numbers in the spec sheet. Also, a rather limited FFT implementation (no averaging or max hold) with a buggy Flattop window function -- I don't think the recent firmware upgrade has changed that?

More fundamentally, I find it very odd that Rigol offers a product family in this price range (up to the DHO4000!) which does not provide any options for digital inputs, built-in function generator or control of an external generator. I would have expected to see enhanced models with these capabilities before Rigol launch a scaled-back -U version. Especially given the fact that these options are available in the low-end DHO900 series, which is based on the same software platform.
thm_w:
DHO900S is a $770 scope. You've added $330 to the price of a DHO800 just to get a wimpy built in LA and Sig gen. Not worth it.
I'd rather put that money towards a good external gen, which yes you are right should really be supported via network or USB control.
rpro:

--- Quote from: ebastler on August 01, 2024, 11:54:47 am ---
--- Quote from: Njk on August 01, 2024, 11:09:01 am ---What's terribly wrong with that scopes at the time?

--- End quote ---

A very slow "recording" mode with abysmal waveform (trigger) rates comes to mind


--- End quote ---
Fast enough (on DHO800 at least)  for some use cases....e.g., see attached.
ebastler:

--- Quote from: rpro on August 02, 2024, 01:38:39 am ---Fast enough (on DHO800 at least)  for some use cases....e.g., see attached.

--- End quote ---

Thanks for sharing the video. It shows 270 waveform captures in 3 seconds or so, around 10 ms per capture. But each actual sweep only takes 500 µs. So what is the scope doing in the meantime?
ebastler:

--- Quote from: thm_w on August 01, 2024, 09:38:32 pm ---DHO900S is a $770 scope. You've added $330 to the price of a DHO800 just to get a wimpy built in LA and Sig gen. Not worth it.
I'd rather put that money towards a good external gen, which yes you are right should really be supported via network or USB control.

--- End quote ---

I am not advocating the DHO900 in particular. Rigol's design choice to divide the available sampling rate between the analog and digital inputs is very unusual and quite disappointing, so I agree that the built-in LA is compromised. But I would expect to have proper LA inputs in the DHO1000 and 4000 series which don't hamper the analog performance, as offered in the MSO5000 or even the DS1000Z Plus.

Regarding the signal generator, personally I also prefer an external one without too many compromises. If Rigol could implement the option to drive an external Rigol generator for automated Bode plots, that would be ideal in my opinion. But for whatever reason they have never offered this in any of their scopes.
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