| Products > Test Equipment |
| Rigol DS1000Z series buglist continued (latest: 00.04.04.04.03, 2019-05-30) |
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| Karel:
--- Quote from: metrologist on October 27, 2017, 04:17:08 pm ---So then, how did DSRemote get the info for the extra divisions? In normal mode, it would only receive the display data. --- End quote --- When requesting the display data in normal mode, the scope will send 1200 samples (200 for every horizontal division). Every sample is transmitted as one byte (when format is set to byte). So every sample contains 2^8=256 vertical steps which is the full dynamic range of the adc. |
| metrologist:
So then I don't understand the point of having a mode setting, at least not the RAW setting. Seems you could set the format to WORD and get the same information (range). Anyway, that's off topic now. |
| Fungus:
--- Quote from: frozenfrogz on October 27, 2017, 12:43:51 pm ---Since I was quite busy the last couple of days I added the ADC gain <-> display mismatch bug to the OP just today. --- End quote --- Is it definitely a bug then? A "bug" implies it's something unintentional that needs fixing with a firmware update. If it's due to a hardware limitation then it's not really a bug (in my book). Even if it's done deliberately due to a marketing decision, then ... it's still not really a bug as such. --- Quote from: RoGeorge on October 27, 2017, 02:58:58 pm ---The vertical resolution is 8 bits. It doesn't says all 256 values must fit on one screen. --- End quote --- What happens if you freeze the display and move it up/down. Does the extra signal scroll into view? If it does then it's not a bug, it's a feature. :popcorn: |
| Karel:
--- Quote from: Fungus on October 27, 2017, 06:17:04 pm ---What happens if you freeze the display and move it up/down. Does the extra signal scroll into view? --- End quote --- Good question, I just tried. You can scroll into view. But still, it makes no sense. Why not showing the whole waveform when it's running? The 4000 series has the same display resolution and they do it correctly i.e. they show the whole waveform when running. |
| Fungus:
--- Quote from: Karel on October 27, 2017, 06:38:40 pm --- --- Quote from: Fungus on October 27, 2017, 06:17:04 pm ---What happens if you freeze the display and move it up/down. Does the extra signal scroll into view? --- End quote --- Good question, I just tried. You can scroll into view. --- End quote --- It's a feature! R&S charge extra for their "virtual screen" function (which basically does the same thing). --- Quote from: Karel on October 27, 2017, 06:38:40 pm ---But still, it makes no sense. Why not showing the whole waveform when it's running? The 4000 series has the same display resolution and they do it correctly i.e. they show the whole waveform when running. --- End quote --- Must be a hardware limitation. If 200 pixels are visible then they're obviously just dividing by two in the display logic instead of fully scaling the values. Maybe they ran out of gates in the FPGA or it would be much slower or something. Only Rigol knows for sure. The 4000 series will have a more powerful chipset. |
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