Hello,
I am a beginner in electronics, but I have a background in physics and basic knowledge in electricity. For many years I have had some electrical measuring instruments, e.g. multimeters and also a 40 year old Oszilloscope. (to be honest I have a lot of multimeters, which Dave Jones is not completely innocent of...

) But now I have decided to do more in the field of electronics and since half a year I'm doing more information. The first Arduino projects I have already worked on. Here in the eevblog I can read so much that I am busy for years...
Now I bought a DSO (Siglent sds1202x-e) three weeks ago. It's a lot of fun to try everything I can with it and I constantly get new ideas here in the forum and on the linked Youtube tutorials.
Now I was visiting a friend of mine who is a professional electronics engineer. At work he probably works exclusively with Tektronix Oscilloscopes. For his small private laboratory he also bought a Tektronix, namely a Tektronix TBS1154.
Now finally to the actual question.
I could have a look at this device and my friend showed me some details of it. As a beginner I wasn't able to recognize the differences between Tektronix and my beginner device so fast, but of course it's clear to me that Tektronix belongs to the professional league and is therefore much more expensive than my Chinese beginner device. He paid 1800€ for it. I do not want to compare the two DSO's at all and price comparisons always limp. But what I didn't understand at all is that the device has a record length of 2,5kpt. When I asked him, that this seems to me in the comparison with other current DSO's extremely little, he said that one cannot compare this. Tektronix have a completely different technical approach and therefore the 2,5kpt are more than sufficient. But he didn't say more about that.
But googling hasn't helped me figure out what this other approach at Tektronix is in terms of record lenght. Therefore my question here, what do the 2.5kpt of the Tektronix TBS11154 mean and what is the difference to the 14Mpt of my DSO?
Thanks, Jürgen