Products > Test Equipment
Rigol HDO1000 and HDO4000 12bit oscilloscopes launched in China
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ebastler:
I think I have seen enough. My DHO1074 is now a 70 MHz version with basic memory again, with fans running at full speed and no Key.data file just like I received it. Wiped the fingerprints off the screen, put it back into its box, and triggered the return process at Amazon.

There is a lot I liked about the scope. The 12-bit front end is "real", with low noise and usable 14- and 16-bit modes. The screen is brilliant, although a bit too reflective for my taste; the UI, while maybe a bit playful, works quite nicely indeed. And the decoding and measurement functions do work from full memory; I had them count 153000 pulses in a region defined by the on-screen cursors for example.

But there are just too many rough edges and cut corners: Measurements can't be changed after being set up (or at least not all parameters?); the Flex-knobs change parameters on awkward scales and get confused as to what they are controlling; FFT resolution and window functions remain dubious; recording mode is lame to an extent I can't understand...

Using the scope always felt like I was tip-toeing, weary of the next little stumbling block. Since this series has been in the market for more than a year, I don't have very high hopes regarding firmware improvements. And Rigol Europe, who took four weeks and three reminders to finally send me an upgrade code -- which then did not work at all -- did not instill a lot of confidence in the customer support I could expect.

Kudos to Amazon for their generous return policy. Their 2-month return window allowed me to be a good boy and wait until Christmas, then evaluate the scope in some detail. I keenly await Siglent's price for the SDS1000X HD, and will probably shell out the extra money for that scope when it eventually becomes available. In the meantime it's back to the DS1054Z, to re-calibrate my expectations.  ;)
Martin72:

--- Quote ---And Rigol Europe, who took four weeks and three reminders to finally send me an upgrade code -- which then did not work at all -- did not instill a lot of confidence in the customer support I could expect.
--- End quote ---

At least they answered you, so you're ahead of me. :P
egonotto:

--- Quote from: ebastler on January 09, 2024, 07:36:02 pm --- and measurement functions do work from full memory

--- End quote ---

Hello,

respect for your decision.

I doubt if the whole memory is used for the measurements. In the noise measurements, I got different results in stop mode, when I changed the part visible on the screen. This does not change the memory content.

Best regards
egonotto
ebastler:

--- Quote from: egonotto on January 10, 2024, 01:49:56 am ---I doubt if the whole memory is used for the measurements. In the noise measurements, I got different results in stop mode, when I changed the part visible on the screen. This does not change the memory content.

--- End quote ---

Right, when I said "work from full memory", that was not the best way to phrase it. The measurement functions seem to use the full time resolution provided by the memory. (In contrast to the old DS1054Z, for example, which only works with the down-sampled display data.) That makes a huge difference, of course, enabling meaningful measurements and decoding in many situations where using the display data does not give any meaningful results.

I am not sure what actual time range is processed under which circumstances. In my experiments a few days ago I deliberately limited the measurements to a range selected by the cursors -- a functionality my old scope does not offer at all, and which I found most useful, by the way.
Njk:
Not everything is in the spec. For trigger output, basically only its existence is documented. In DS1000Z, the trigger output (and Pass/Fail) signaling is implemented in the lazy logic way, the scope asserts the signal and forgets about it till the moment it's about to start the next acquisition cycle. So the pulse width may vary, depending on time base setting, memory depth, etc.


--- Quote from: thm_w on December 28, 2023, 09:43:15 pm ---AUX out works - 60ns pulse of 1.5V into 50R

--- End quote ---

That makes me confusing. Does it mean that in the Android series, Rigol changed the implementation such that the trigger output signal is now a pulse of fixed duration, a sort of marker? 60 ns is a short time.
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