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Functional comparison of R&S RTB2000, Siglent SDS2000X and Keysight DSOX1000

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RBBVNL9:

--- Quote ---The RTB has 10 divisions while Siglent has 8 as far as i know.
--- End quote ---

Ah yes, you are right in that.
RTB2000: 12 horizontal, 10 vertical divisions
SDS2000X+: 10 horizontal, 8 vertical divisions

Had that correct in the overview document but misquoted myself  :-[

2N3055:

--- Quote from: RBBVNL9 on January 11, 2022, 07:26:32 pm ---
--- Quote ---The Rigol MSO5000 is hardly missed in there.
--- End quote ---

The honest answer is: I don’t own an MSO5000. If I had one, I would certainly be happy to include it. But I want to base my comparison on first-hand observations... If someone owns both the SDS2k+ and MSO5000, do compare, and be my guest to use the structure of the document prepared for this comparison.

(And there are a couple of other scopes I’d love to lay my hand on, too ;-)

About including the Keysight DSOX: I thought it would be worth including this one because Keysight, with this oscilloscope, competes squarely with the R&S RTB oscilloscope in the educational market. While the DSOX1204G was only introduced in March 2019, it has a design/UI concept without a touch screen, and I thought it would be interesting to see how that compares. Is the touch screen design/UI concept overvalued, do other things matter more? Or is it really a no-go to buy a non-touchscreen device today? (Note that also the current Keysight InfiniiVision 2000 X-Series has no touch screen…)

I also recall EVVBlog’s Dave even recently writing that the DSOX is his go-to scope in the lab. Made me curious too, what qualities make him turn to this instrument, while he (arguable) has choices in his lab?

Finally, I found that the DSOX has some nice tricks up its sleeves too that the other scopes I reviewed could learn from. Some examples: (1) when a channel is set to AC coupling, it disables the DC mode of the DVM. The RTB, for instance, does not do this and hence present wrong measurement results. (2) It can do XY imaging with blanking coming in on a “Z” channel. (3) It can link the trigger system to modulation of the internal AWG, thus exploiting the fact the AWG is built into the same device. (4) When in web access mode, the device itself (!) delivers an extensive HTML guide of SCPI commands to the connected computer. Do such points alone make it a more attractive scope than others? I don’t think so. But we do learn from it.

--- End quote ---

There are many people that use digital scopes old way, like a CRT scope with memory and measurements and storage.
They twiddle buttons until what's on screen looks familiar. They don't think about digital scope as an dedicated analytic computer with a signal acquisition front end. They want for scope to emulate CRT scope, as much as possible. That is the way they think, the way they know how to use it, the familiar way.
They are the ones that love Keysight InfiniiVision scopes. They are good scopes for service, for instance, where you need to simply check if there is signal, that signal roughly looks like it should and have basic tools for that.

In a perfect world, one would have an advanced analytical scope that does advanced analysis, and one Keysight Infiniivision scope for service type of work. Preferably 3000T/A series, DSOX1000 series are too basic to justify purchase.

If I had only one scope, no way I would get DSOX1204 before RTB2000 or SDS2000X+.

If you just have a hobby, want a modern replacement for your old CRT scope and you only want to do basic things, DSOX1204 will do that job well.
For same money you can get more value if you look elsewhere.

RBBVNL9:
@ PeDre


--- Quote ---With the RTB2004 you can activate the Z channel with SCPI commands.

--- End quote ---

Awesome! Played a bit with it, it works. Noted you you first need to set the waveform brightness first to 50%, otherwise there is no blanking. And it takes a bit of experimenting to determine the input level/settings and the actual degree of blanking. 

This trick is not anywhere in the RTB manual, however. (Searching for it, I did find it in RTM20xx manual..) 

Are you (or others) aware of other functionalities of the RTB not documented in the manual?

If so, please share!!!

Thanks again.

RBBVNL9:
@ Pope:


--- Quote ---It would be great if there were timestamps on the video.

--- End quote ---

Done.

@2N3055:


--- Quote ---Keysight OTOH is much simpler platform and has much less features, releases were mostly bug fixes and paid features unlocks
--- End quote ---

I was surprised myself to see how many actual new features were added by Keysight via firmware updates. Examples (just looking since at FW2.x versions, after Keysight moved to Linux OS):
- Measurement statistics (FW2.12)
- USB Keyboard entry for labels, annotations, file names, etc. (FW2.10)
- Table (lister) of serial decode messages (FW2.10)
- DEMO function with training signals etc. (FW2.10)
- LXI compliance and VXI-11 protocol support (FW2.10)
- Save and upload waveforms and other files via web interface (FW2.10)
- SCPI Device Control online manual via web interface (FW2.10)
- USB or LAN attached printer support (FW2.10)

Granted, some of these just brought the instrument in line with what was already there in competing scopes, but still, it's nice to see that functionalities are added, even as of recently (September 2021).

Performance improvements include:
- Increased waveform update rate (FW2.10)
- Increased number of memory segments (FW2.10)
- Additional memory depth (FW2.10) (even if it's still not impressive compared to competitors...)



2N3055:

--- Quote from: RBBVNL9 on January 14, 2022, 07:52:11 am ---@ Pope:


--- Quote ---It would be great if there were timestamps on the video.

--- End quote ---

Done.

@2N3055:


--- Quote ---Keysight OTOH is much simpler platform and has much less features, releases were mostly bug fixes and paid features unlocks
--- End quote ---

I was surprised myself to see how many actual new features were added by Keysight via firmware updates. Examples (just looking since at FW2.x versions, after Keysight moved to Linux OS):
- Measurement statistics (FW2.12)
- USB Keyboard entry for labels, annotations, file names, etc. (FW2.10)
- Table (lister) of serial decode messages (FW2.10)
- DEMO function with training signals etc. (FW2.10)
- LXI compliance and VXI-11 protocol support (FW2.10)
- Save and upload waveforms and other files via web interface (FW2.10)
- SCPI Device Control online manual via web interface (FW2.10)
- USB or LAN attached printer support (FW2.10)

Granted, some of these just brought the instrument in line with what was already there in competing scopes, but still, it's nice to see that functionalities are added, even as of recently (September 2021).

Performance improvements include:
- Increased waveform update rate (FW2.10)
- Increased number of memory segments (FW2.10)
- Additional memory depth (FW2.10) (even if it's still not impressive compared to competitors...)

--- End quote ---

Out of all these DEMO with training signals is only thing that is optional and useful. Printer support is useless and never in my life I used it or will. Saving data to network share is useful thing. They have same stupid thing in expensive 3000T series too.

The rest of the features are things that they HAD to add because they were ridiculed about it. Even 300€ Rigol DS1054Z and Siglent SDS1104X-U has statistics... SDS1104X-E has all of it for whooping 500€...

Memory was pathetically small, it had 50 segments in segmented memory.. etc etc..
It wasn't them being nice, it was the struggling to survive...

Funny thing, is by doing all that they made it actually usable, and if I had to buy low end Keysight scope, I would buy DSOX1200X and not 2000S series.. It is much more affordable and basically better.

But DSOX1204 is seriously outclassed by both RTB2000 and SDS2000X+.  They are two levels up from it.

There is nothing impressive about DSOX1204. Just a nice CRT emulation with good refresh rate. Which, by the way is NOT at the level of 3000a/T series (that is "legendary" for it's 1 Milion triggers per second) but only has 1/5 of that.  Still very good thou, but nothing special.
Rigol MSO5000 is more than twice faster than that.

It reminds me of one of those Ferrari branded golf carts. Whooohoo but bla...

If it where 500-600 € scope then fine. Even then, competition has more memory etc etc. But that is it's class. And we could argue feature ws polish and brand name ...


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