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| Spikes and noise on Rigol DHO814 |
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| jim_griff:
~17µs / ~58kHz switching frequency. The same frequency, but much higher in amplitude, when putting the probe next to the power brick. It's definitely the culprit. |
| jim_griff:
--- Quote from: jim_griff on March 14, 2024, 04:11:21 pm ---~17µs / ~58kHz switching frequency. The same frequency, but much higher in amplitude, when putting the probe next to the power brick. It's definitely the culprit. --- End quote --- Here are measurements with two probes. One sitting on the desk (yellow trace), the other by the Rigol PSU brick (blue trace). Yellow is 500µV/div; Blue is 100mV/div EDIT:(20MHZ B/W limit.) |
| Fungus:
--- Quote from: jim_griff on March 14, 2024, 03:32:19 pm ---The noise is definitely coming from the Rigol PSU brick. --- End quote --- ...or through it from a dirty mains supply. |
| eTobey:
--- Quote from: Fungus on March 14, 2024, 09:38:26 pm --- --- Quote from: jim_griff on March 14, 2024, 03:32:19 pm ---The noise is definitely coming from the Rigol PSU brick. --- End quote --- ...or through it from a dirty mains supply. --- End quote --- So then where in the world can this signal come from? It must be somewhere between germany and UK? Maybe its the wind turbines in the sea?? :palm: |
| shapirus:
--- Quote from: eTobey on March 14, 2024, 10:09:43 pm ---So then where in the world can this signal come from? It must be somewhere between germany and UK? Maybe its the wind turbines in the sea?? :palm: --- End quote --- Nah it must be coming from the outer space, as I'm seeing it too: This was captured with the probe in the 10:1 switch position and the ground attachment shorted to the tip, creating a loop, lying right on top of the PSU. |
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