comical or not, professional or not, sds800x cannot see 400-500MHz even on one channel active, prove me wrong.
🤣🤣🤣 I don't need to. The FACT of REALITY is that if you're trying to measure outside of the scopes designed bandwidth, then the results simply won't be accepted by any professional. The results shapirus showed of his DHO800 measuring 500MHz were TERRIBLE. If you think that's something to be proud about, I don't know what to tell you.
Do you need to measure a 500MHz signal? Your scope better be CERTIFIED to do so, or you could be subject to legal action when the product you're trying to sell doesn't meet specs, or the device you certified as functional isn't. Standards and reality matter, unless you're talking about a toy.
Are you looking for a toy or a tool?
Your scope will not be "certified" whatever that means when out of cal either, and I bet most, if not all of your equipment is not calibrated regularly.
Certainly mine isn't, and I intend that to stay that way.
You're right about me personally not needing cal certs (though most of my gear is still within cal, and yes, I will send stuff to be calibrated when I deem it needed).
I couldn't care less about 500MHz signals right now, which doesn't mean being able to visualize that signal is completely useless for everybody. Very few people buy either of the scopes discussed in this thread for certification and measurements in which legal liability is involved, and nobody without periodic calibration.
I do sometimes care, and I have a 500MHz scope, so that's pretty easy to visualize ACCURATELY. 😉 Look at shapirus' 500MHz example above. That's absolutely not an accurate visualization of the waveform. If you want to see an accurate visualization of the waveform, see my video that follows the sweep on a 500MHz scope. Pretending they're the same thing doesn't make it so.
Let's keep the discussion where it belongs. I do agree that the SDS800X-HD is a better oscilloscope overall. I can also see why, for basic use, the DHO800 can be more than enough and in that case in particular it might be a better purchase due to some usability and convenience advantages.
Keeping the discussion where it belongs means actually discussing the limits and proper use of both scopes. Yes, that means the reality of what the scopes are capable of. As I said in my summary, accurately, they both have their pros and cons. As you said, the SDS is a better scope overall. I agree. I'm not arguing that the DHO isn't a good scope for what it is. If the SDS didn't exist, and somebody needed a 12-bit scope under $500, I'd tell them to get the DHO, despite me hating Rigol in general. But the fact is, if you don't need HDMI out, there's a better scope available for the same price. 🤷