I've been looking into a scope that I'd use in part to debug DC-DC converter circuits. The DS1054Z seems great in terms of features and cost, and is well-liked on this forum, but I was wondering if 50MHz would be sufficient.
Many new DC-DC chips switch at 1MHz, and some of the compact ones switch at 1.5MHz. Some of the integrated-inductor chips go up to 3MHz, but that seems rare.
When the switching frequency is around 1MHz, I've seen waveforms being inspected at 400ns/div, and then zoomed in further. Articles about what's "sufficient" for different applications differ, but I've seen suggestions anywhere between 50MHz and 400MHz when working on SMPS.
The Siglent SDS1202X-E is 200MHz and reasonably priced, but for debugging DC-DC converter circuits I've read that 4 channels are recommended if I don't want to be constantly detaching/attaching probes (is this true?).
Anything above 200MHz seems to spike the price significantly. I'd rather not spend over $500, but I can go up to maybe $750.
Any suggestions welcome.