No more switchable oscilloscope probes!

[g1]

If that’s the case, wouldn’t the cap block the DC voltage then?

Yes, but it can only block it's rated voltage. Here is the thread where I got schooled on it. Bottom line is not to exceed the voltage rating of your scope's input cap when on AC coupling. And that you have to account for combined DC + AC as pointed out by Tom Phillips in one of the posts.
https://music-electronics-forum.com/...n-oscilloscope

[Helmholtz]

Things became clear to me when I realized/verified that a x10 probe only has a series resistor and not a voltage divider.
While a x100 probe contains a full voltage divider.

Now someone might ask why a x100 probe which divides ACV as well as DCV by a factor of 100 like a Tek P6009 is only rated for 1.5kV and not something like 40kV (100 times the scope's limit).
I think the reason is the voltage limits of the components and the dielectric strength of the insulation system (including creepage and clearance distances).
In our lab we had a few of those real high voltage (x1000) Tek probes. Man, those were huge and heavy (probably oil filled).
https://uk.rs-online.com/web/p/oscil...probes/7966702

[Helmholtz]

https://music-electronics-forum.com/...n-oscilloscope

Another one of those great early threads I missed.

BTW, I'm with Chuck regarding the x misnomer.

[Tom Phillips]

The 10X was originally adopted because you needed to multiply the amplitude reading on old scopes by ten to know the correct signal amplitude. The scopes of the olden days did not have auto switching indicators on the front panel controls nor did they have numeric readouts on the CRT.

[Tom Phillips]

...In our lab we had a few of those real high voltage (x1000) Tek probes. Man, those were huge and heavy (probably oil filled)...

They were filled with freon.

[SoulFetish]

The 10X was originally adopted because you needed to multiply the amplitude reading on old scopes by ten to know the correct signal amplitude. The scopes of the olden days did not have auto switching indicators on the front panel controls nor did they have numeric readouts on the CRT.

Yeah, Chuck. What he said

[Helmholtz]

The 10X was originally adopted because you needed to multiply the amplitude reading on old scopes by ten to know the correct signal amplitude..

Yes, that's the official justification.
Still feels like inverse logic to me after having been using scope probes for over 50 years.
But it's a convention and I don't intend to revive the old discussion.

[Tom Phillips]

...Still feels like inverse logic to me...

Agreed. It's one of many things that started long ago and became "official" terminology.