| Products > Test Equipment |
| Rigol DS1000Z series buglist continued (latest: 00.04.04.04.03, 2019-05-30) |
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| frozenfrogz:
With 1x magnification it is showing the described behavior on my scope. When using 1x and moving the trace you can only shift it +/- 2.0V in the 200mV range. I guess the ADC would be out of bounds otherwise or something...something. While you can not shift the trace more than 2V naturally in the 200mV magnification, jumping from 500mV to 200mV breaks that. I could not think of a real world application where the proposed settings are needed though. |
| RoGeorge:
At the beginning, the trace is in the middle of the screen. When setting the trace to -5V, the trace is displayed one division lower than the middle of the screen. When scale is set to 2V, the trace is 2.4 divisions lower than the middle of the screen. When scale is set to 1V, the trace is at the bottom of the screen. When scale is set to 500mV, the trace is still displayed at the bottom of the screen. Is this "the bug"? This is expected, because when the trace is supposed to be out of screen, the oscilloscope still displays the trace as a line at the most upper or lower side of the display area. For example, if you signal is "out of the screen" only some areas, you will not see an interrupted trace. The displaying of a trace is always bounded by the upper or by the lower screen area. Other said, if a trace should be represented "1 meter under the display", the oscilloscope will still draw a continuous line at the most lower pixels of the display. It is not like on an analogue display where the trace completly dissapear when it is too high or too low. This is not a bug, it was always like that, it was debated before and many people prefer to see a line at the extremes of the display rather than seeing the trace completely disappearing. To be sure a waveform is correct, never let the trace to touch the most upper or the most lower pixels. |
| Payne:
RoGeorge, you get the problem when you set to 200mV, the trace will suddenly appear again. Yeah, I know the problem maybe is a bit academically, but still it is strange and confusing Actually, you can go out of the borders, and still have a nice trace, because the DS1054z works internally with 10 vertical divisions but only show/zoom into 8 divisions |
| JohnPen:
I am not able to reproduce the problem on my scope. (No probe connected and X1 setting). As mentioned by Fungus there is a relay click when changing sensitivity to the 200 mV range and the trace stays glued to the bottom of the graticule. Whilst typing this comment and having let the scope warm up fully I now get a different effect! On switching to the 200 mV range the trace now reappears in the middle of the screen and then progresses positively towards the top of the graticule. Increasing the sensitivity to 20 mV the trace glues to the top of graticule and remains there for further increases of sensitivity. Strange that it was different from initial startup but behaviour not unreasonable for for offsets hitting the stops of the ADCs. Presumably the F/W could have covered these extremes by covering <=200 mV ranges in the same way as 500 mV. If it is off the screen usually you turn the sensitivity down until you see the trace again but I suppose one could be confused under some circumstances. |
| Fungus:
--- Quote from: frozenfrogz on April 09, 2018, 07:42:06 am ---I can not reproduce that on my scope.settings. --- End quote --- Nor me. |
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