| Products > Test Equipment |
| Rigol HDO1000 and HDO4000 12bit oscilloscopes launched in China |
| << < (206/258) > >> |
| gburdzin:
Yes I have already and as I mentioned there, the BW upgrade is not working for my DHO1104. That is why I am asking. |
| Martin72:
Then I would put the question in the hacking thread, because that's what it's there for. Here it goes under. |
| thm_w:
The DHO1000 I received has been sitting around for almost a year, cal print date of 11/2022. Definitely not a top seller. Could even be some of the first NA production batch. edit: 46W power consumption on, 1.2W when off. |
| TurboTom:
The math functions IMO are actually quite decent -- admitted, a free math formula entry mode would be preferrable but since there are four possible math windows available, one can do pretty decent stuff with them. Moreover, they are also reasonably fast. As an example for the accuracy, I added screenshots of a PRBS signal first integrated and then differentiated again and then vice versa. As a peculiar sidenote, it's obvious that Rigol calculates the math in the Zoom window independently of the main trace, easily to be seen in the last screenshot where the trace has been shifted slightly so the first derivative peak goes negative and thus shifts the whole integration trace down vs. the main window. But the accuracy of the reproduction of the original trace is quite satisfying. No way this kind of precision could have been reached with Rigol's legacy scope's math engines... |
| TurboTom:
The detented optical encoders (used for input sensitivity and timebase) that Rigol "hyped" so much for longevity in their ads are crap! Either this or Rigol's engineers still didn't learn how to program such an encoder interface properly (which may very well be possible but is equally embarrassing for them): While the timebase adjustments work more or less correctly on my black-friday DHO1000, the input sensitivity encoder works okay when turning clockwise, in the counterclockwise direction it frequently skips an increment between two detents and changes the value by two increments upon the next detent. These encoders have either two or four phase changes between two detents, and at least one phase change happens close to the detent positions (but may slightly be offset to either side) while the other happens approx. half-way in between the detents. And obviously the latter phase change is the one that the increment/decrement of the adjustable value should be synchronized on. I found this annoying behaviour already on my (almost a decade old) DG4000 AWG. Seems like Rigol hasn't learned anything since! :-- :palm: |O :rant: And the worst thing about this is that it (most likely) cannot be corrected by firmware update since the front panel PCB contains its own Microcontroller / PLD that manages all the LEDs, pushbuttons and encoders and converts their status into a serial data stream. Apparently, this device needs to be programmed via its own ICSP connector! |
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