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New Rigol DS1054Z oscilloscope

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RoGeorge:
This is what I'm seeing.  I don't recall it to be like that before update.  Not that it is brighter/thicker, but also the intensity flickers randomly.

There are huge sinx/x artifacts when the signal is very fast.
Sync is on the magenta (Ch3).
All trace intensity is flickering randomly, like in the animated gif attached.  Display and acquaire are set to normal.
There seems to be always more than one trace on the screen, even when persistence is set to minimum, as seen in the capture.  I guess that's why I perceived the traces as brighter, IDK.

- Yellow is from the generator output, probe 10x, no terminators, 20 MHz, square wave, 50%, 0 to 3V
- Magenta is the high speed sync output from the signal generator (also 20 MHz, but TTL output with a 50 ohms cable and 50 ohms pass-through terminator near the oscilloscope input)
- Blue dark and light (Ch2 and Ch4) inputs have no probes/cables attached



Questions:
0.  Is anybody else seeing the same, or is it something wrong with my hardware?

1.  How can I downgrade to the previous firmware, please?  Is there any way without unpacking, fake an old version as being newer than 00.04.05.01, then repacking all back.  If not, is there any step by step example of how to do the modification

2.  Why, and where from is this fashion of blocking a downgrade?  What's the technical reason of not letting one to use whatever version one wants?

ebastler:
Sorry, I only get a static .GIF displayed. Is it really animated?

Looking at the static screenshots, this looks normal to me -- provided that your signal generator actually exhibits the jitter which the scope displays. Having more than one trace even at minimum persistence time is normal, I think. My DS1054Z does that too, with the 00.04.04 SP4 firmware.

RoGeorge:
Seems like EEVblog turns animated GIFs into static GIF.  This one is saved externally, I hope it will show animated (and it is animated in my Firefox browser).  Here the animation is constant lighter/darker alternations, but in reality it is flickering between the two intensity levels like a candle.



Also note how the jitter of the magenta signal is much larger than the jitter of the yellow edges.  Since the two signals are synchronous, I'll say the jitter is in fact caused by numerical artifacts of sinx/x, maybe bad sync detection, too.

Adrian_Arg.:
Try this:

--- Quote ---To downgrade do the following:
-Copy the .GEL file with the firmware version you want to a USB stick that you know is compatible with the DS1000Z series.
-With the scope powered OFF plug the USB stick into the scope.
-Power the scope on.
-When the splash screen with “Rigol” appears you should hear a quick beep which indicates it sees a USB device.
-As soon as you hear the beep press the “Help” button 3 times quickly.
-In a few seconds you should see the channel 1 LED blinking - this indicates it is flashing the firmware.
-Once done flashing the scope will boot as normal and tell you it found a firmware update with the same version it just flashed, you can press cancel.
-You can then verify the new detailed version info by pressing “menu menu force menu” quickly, then pressing “utility”,“system”, “system info”.
-I'd reboot at this point before using the scope just for good measure.

--- End quote ---
[/quote]

After trying 1000 times I do not know what happened, today the first attempt it worked, I tried with almost all the firmware versions and it did not work, until a revision that corrects the problem of the 24 Mbit of depth and the measurement does not come out, I do not return to install . :scared: :scared:



in spanish
Despues de intentarlo 1000 veces no se que paso, hoy al primer intento funciono, probe con casi todas las versiones de firmware y no funcionaba, hasta que no salga un revision que corrija el problema de los 24 Mbit de profundidad y la medicion, no vuelvo una instalación

ebastler:
Yes, now the animated GIF works for me too. Thanks for fixing that.

Hmm, that flicker looks disconcerting indeed. Any chance that some unusual trigger condition or trigger delay is active? Although I am not quite sure how that would cause this effect.

Regarding the jitter: Since the yellow trace is phase-shifted vs. the magenta one by approx. 90°, I would expect the yellow trace to show half the jitter amplitude of the magenta one, when comparing the yellow rising & falling edges directly to the left and right from the trigger time with the jitter on the magenta falling edge which follows the trigger. That seems to be the case. For the edges further away from the trigger time, the yellow jitter should be reduced accordingly. To the far left of the screen, that relationship does indeed not seem to hold up, but otherwise it might be OK?  So I am not sure whether this is indeed an artefact of the scope.

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