I hope they do that sooner rather than later...
Just had a look, even the MSO8000A does not offer more than what the DHO800 offers in terms of FFT.
But at least the unit is given with RBW, although I know this from the MSO5000 as well.
Apart from that, if you can't set the number of points, it would be great if the rigol could at least show how many points are currently available.
"Max. 1Mpt" (from the manual)doesn't say anything at first.
Apropos, It's been a long week, it's evening, you can have a bit of a mental block...
Like me right now, operating the rigol from the living room.
Span= half of the current samplerate
RBW= 1/capturetime
If the timebase ist set to say 50µs/Div, capturetime should be 500µs, so RBW should be 1/500µs = 2000Hz.
With the Rigol, I have an RBW of 5000(Hz) precisely under these parameters.
What else does the RBW depend on?
And:
Span is currently 625Mhz, which makes sense if the sample rate is 1.25GSa/s.
I know from siglentscopes that the FFT sample rate is equal to the sample rate of the time domain if the number of FFT points is greater than the number of points of the current memory points.
Since the FFT sample rate is the same, I assume that rigol "has" more than 625kpts for the FFT (unfortunately it is not displayed).
If I now set the memory from auto to manual and let's say 10Mpts, the FFT sample rate should go down.
But it doesn't, Instead, the RBW is now reduced to 2000Hz - i.e. to the value actually to be expected at 50µs/div.
And that's where my mental block is, I must be missing something.
Edit: Forget it, the rigol drives me crazy...
While typing this post, the rigol shows 5K RBW until I´ve set the memory 10 Mpt as mentioned above.
So I make a pic from it, then I want to make a pic from the state before, switch back to Automemory and 625kpts - RBW remains 2K...
And it´s getting better:
OK, let´s change the timebase and go back to 50µs/Div.
Now I have 1K RBW....