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Rigol MSO 5000 hardware/software revisions
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TK:
One difference Dave noticed during the MSO5000 teardown was the difference in the input stage shielding.  The 5000 has the shields open with aluminum heatsinks sticking out.  I am not an expert but I suspect it cannot be as good shield as one completely closed.
Martin72:

--- Quote ---I am not an expert but I suspect it cannot be as good shield as one completely closed.
--- End quote ---

I´m not an expert in this too, but I would agree to this.

typoknig:

--- Quote from: TK on March 27, 2020, 08:30:28 pm ---One difference Dave noticed during the MSO5000 teardown was the difference in the input stage shielding.  The 5000 has the shields open with aluminum heatsinks sticking out.  I am not an expert but I suspect it cannot be as good shield as one completely closed.

--- End quote ---

Here is a link to that point in the teardown. Note that the 7000 does have some holes in the cans, just smaller.

https://youtu.be/P5faiEUXbGg?t=772
skander36:
I think the problem is rather in software .
Don't forget that the problem is not present in fw. 04.08 and still in 02.02 .
Only in 02.03 can be corrected.
NoisyBoy:
I would say the ghost channel is caused by the firmware upgrade, but the 1+ mV noise I picked up is definitely RF interference.

The larger opening above the ASIC heat sink may very well be the cause of the RF interference.  It is something that we should be aware of while placing the scope.  It seems like Rigol might have focused more on cooling and less on interference while coming out with the design. 

Comparing this to the Siglent 2000X+, https://www.eevblog.com/forum/testgear/siglent-sds2000x-plus-coming/msg2976282/#msg2976282, the Siglent seem to do a better job in providing more comprehensive shielding for the front end from the look of it.
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