I currently have a quad channel 100 MHz HP 54501A digitising oscilloscope, which I bought about 2 years ago. But I am finding its 10 M/S limit a pain, as well as other limitations from a nearly 18 year old digital oscilloscope.
Recently I started looking at power supplies. You just can't get the same feel as an analog scope as there is really no true persistence mode, except on the higher-end DPO models, which cost a lot of money.
Here, I wanted to see what the output ripple of a small buck power supply was. This image (scale 50mV/div) seems to suggest that the ripple extends as much as 100mVp-p; but it is only ~60mVp-p on average as not all parts of the waveform occur with the same "probability". My question is, would an analog scope be more suited to this than with the persistence mode of my digital scope? I can buy a low-end 20 MHz oscilloscope for around £40-50, and am wondering if it would suit my needs well.
Recently I started looking at power supplies. You just can't get the same feel as an analog scope as there is really no true persistence mode, except on the higher-end DPO models, which cost a lot of money.
Here, I wanted to see what the output ripple of a small buck power supply was. This image (scale 50mV/div) seems to suggest that the ripple extends as much as 100mVp-p; but it is only ~60mVp-p on average as not all parts of the waveform occur with the same "probability". My question is, would an analog scope be more suited to this than with the persistence mode of my digital scope? I can buy a low-end 20 MHz oscilloscope for around £40-50, and am wondering if it would suit my needs well.
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