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| Rigol DS1000Z series buglist continued (latest: 00.04.04.04.03, 2019-05-30) |
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| metrologist:
I'm not sure what to make of it. The example has a 20Vp-p signal with the graticule set to show 16V, 2V/div, but DSRemote has the graticule set to show 20Vp-p. Perhaps the bug is DSRemote not using the same display range as the scope? Of course, then you could argue that it would be using 1.6V/div, which also does not match the scope. What would DSRemote display with the 4000 series? What happens at the 16V graticule line? Does it clip there as it would on the scope display? I guess since the data is there and can be moved into view, that is considered display data and is used for the measurements, and is therefore still 8 bits. You just don't get to see them all at once. That introduces some uncertainty since I generally try to maximize my signal for best accuracy, so do I now need to maximize it beyond the display region go get the highest accuracy? |
| Karel:
--- Quote from: metrologist on October 27, 2017, 07:02:37 pm ---Perhaps the bug is DSRemote not using the same display range as the scope? --- End quote --- There's a setting in DSRemote where you can change this behaviour. You can select to let DSRemote show exactly the same as the scopes display with the same number of vertical divisions. With DSRemote you simply have the option to show more divisions and the complete waveform. --- Quote from: metrologist on October 27, 2017, 07:02:37 pm ---What would DSRemote display with the 4000 series? What happens at the 16V graticule line? Does it clip there as it would on the scope display? --- End quote --- The 4000 and 6000 series show the complete waveform. At least they specify 32 steps per vertical division. So, with eight vertical divisions, there are 256 steps on the scopes display. Exactly what fits in one byte and what should come out of the adc. For obvious reasons, DSRemote shows exactly the same with the 4000 and 6000 series. There's no option to extend the vertical range. |
| metrologist:
So DSRemote only shows 8 divisions with the 4/6000 series? The complete waveform would be clipped on the display, if you set it the same way as the 1054. |
| bitseeker:
Correct. The 4000/6000 series scale the 256 values to fit into 8 divisions. The 1054Z, on the other hand, clips values above and below the 200 that will appear on the screen. In other words, it's as if the screen had 10 vertical divisions, but the top and bottom division are simply not visible on the device. As Fungus said, it's as if the 1054Z was permanently zoomed in. So, you can pan the view port up and down by one division to see the data that is out of view. |
| Karel:
--- Quote from: bitseeker on October 27, 2017, 10:04:52 pm ---Correct. The 4000/6000 series scale the 256 values to fit into 8 divisions. The 1054Z, on the other hand, clips values above and below the 200 that will appear on the screen. In other words, it's as if the screen had 10 vertical divisions, but the top and bottom division are simply not visible on the device. As Fungus said, it's as if the 1054Z was permanently zoomed in. So, you can pan the view port up and down by one division to see the data that is out of view. --- End quote --- Correct. Ofcourse there can be debate whether or not this is a bug. It could be very well that, like Fungus wrote before, it's a hardware limitation i.e Rigol cut some corners to keep the price acceptable and this is all done by purpose. I just wanted to bring it up here and will let it up to others if it should be added to the buglist or not. |
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