That's not so bad, but not very clean (well... working in telecom could be too pretentious).
Are you measuring with Pico connected ?
Actually those spikes are probably generated by Pico and they have much higher frequency than 1.3MHz, at 200ns per division it should be 4 divisions (4cm) wide. And they are not soaked, but leaking (through crosstalk, parasitic capacitance/inductance), that's why you see them.
To have a better picture, should do a zoomed in measurement in DC, not AC, with a passive/resistive load (can use AUTO button on oscilloscope).
And please don't take it as an offense, I don't trust UK electrical trade either after seeing bad enough things related.
It's up to you to check/filter or not.
Are you measuring with Pico connected ?
Actually those spikes are probably generated by Pico and they have much higher frequency than 1.3MHz, at 200ns per division it should be 4 divisions (4cm) wide. And they are not soaked, but leaking (through crosstalk, parasitic capacitance/inductance), that's why you see them.
To have a better picture, should do a zoomed in measurement in DC, not AC, with a passive/resistive load (can use AUTO button on oscilloscope).
Sorry missed the question, I was talking about cheap Chinese modules in general (usually the most cramped, the worst).Were those traces from a wall-plate power supply or a wall wart?
And please don't take it as an offense, I don't trust UK electrical trade either after seeing bad enough things related.
It's up to you to check/filter or not.
Statistics: Posted by gmx — Thu Apr 24, 2025 11:55 pm