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| Rigol MSO 5000 hardware/software revisions |
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| Gandalf_Sr:
So are there some ideas as to why this is happening? Like the MSO5000 is picking up some kind of RF transmission and that is messing up the self-calibration? |
| NoisyBoy:
skander36, it is great to hear that the WiFi tip works for you as well and was able to fix your problem. Gandalf_Sr, the Rigol is definitely not great at shielding the frontend from RF interference. I would not call this a failure or classify it as inadequate yet, but I have not seen similar issue at any other test gear in the same test location. In my case, the noise it picked up is between 1-2 mV on channel 2, which is almost 6-7X the normal noise floor, so it definitely would mess with self cal. So if you own or plan to buy a MSO5000, putting it in an area with strong WiFi signal can potentially really mess with your noise floor and cause ghost channel issue. If you have them, try turn off your WiFi while doing the self cal, or while doing low level measurement. Again, this interference was only across one channel in my case, so check all your channels and don't base your finding on channel 1. |
| skander36:
--- Quote from: Gandalf_Sr on March 27, 2020, 11:05:09 am ---So are there some ideas as to why this is happening? Like the MSO5000 is picking up some kind of RF transmission and that is messing up the self-calibration? --- End quote --- And why ch3 is activated by signal from ch1 ? They should not be separated (isolated) ? At what level this influence is done ? |
| Sighound36:
That possibly explains why I have never had this issue with the 8000 or 5000 we have here. The wifi is not meshed but far enough away from the router. When I dismantled the 8000 to rebuild the very average power supply there were RF fingers everywhere, even on the Lan/USB/Aux BNC inputs on the back really nice design as well. All of the ASIC cans use decent finger arrays to the case, this is maybe because of the higher bandwidth potential of the 8000 but they are in all of the places you would expect them to be placed for a half decent scope. |
| NoisyBoy:
Hey Sighound36, thanks for the great input. Do you happen to know whether it is the same with the MSO5000? In my case, I did all the tests with nothing attached, so it was not probe related and the interference was picked up internally. |
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