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Functional comparison of R&S RTB2000, Siglent SDS2000X and Keysight DSOX1000
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RBBVNL9:
Hello!

I recently made the first part of a video review of three popular oscilloscopes: the R&S RTB2000, Siglent SDS2000X Plus and Keysight InfiniiVision 1000 X Oscilloscopes.

The series will be an in-depth functional comparison of the devices. It may serve people that are considering purchasing one of them, but also help people to get to know their device better, quickly find functions and their description in the user manual, etc. Preparing overview, I (re)discovered many features myself. 

In this location, I am also sharing the file with the functional comparison between the three devices. I plan to further update this file over time. Comments, corrections, additions etc. are welcome.

File: Functional comparison RTB SDS DSOX

The ultimate aim here is that all of us can make the best possible use of our measurement instruments!

Future planned episodes include:

1. Physical devices
2. User interface
3. Acquisition systems, channels, horizontal system & trigger
4. Tools
5. Bus decode
6. Analysis
7. Signal generators
8. Memory, history, search
9. Computer access and atomization
10 System features



https://youtu.be/QyMbWtF67E0
2N3055:
Respect for undertaking such an effort!

Looking forward to seeing the whole series.

Just a quick note for v28:

pg 7.  SDS2000X+ 10Bit mode is 100Mhz not 10MHz.

pg 9. SDS2000x+ math: it is not obvious that it has freeform math where you can write freeform formula for math channel. Also there is a track, but not as a math channel but as a tool connected with measurements..

pg 10. 10Bit mode is missing from list acquisition modes. it is a separate setting "resolution 8/10 bit" but really it is a sort of Hires acquisition mode.

pg. 18. Mask failure operations: Stop on fail, Failure to history , Capture on fail, Beep.  Note that those are not mutually exclusive operations, i.e. you can combine them.

Pg 18. Bode plot (FRA) it supports Vari-level and automatic gain.. You can have 4 Vari-level profiles (curves) predefined and saved. I don't recall if there is any preset point limit on curve complexity.

Pg 21.  Siglent and Keysight memory is mixed. It is Keysight that has puny 4 Mpts of memory. Siglent has 100Mpts (full channel config) 200MPts (half channel)

Pg 23. It is not Web storage, but a network share (windows SMB) disk mounting /mapping. It is fully supported for any save/recall operations

All in all great work..

Best,
Sinisa
RBBVNL9:
@2N3055/Sinisa,

Thanks for the corrections and additions! Have processed them and a new version will follow soon. PS.: The Mask and Bode sections are largely still to be written (like some other parts).


--- Quote ---Looking forward to seeing the whole series.
--- End quote ---

Will probably post a new episode tomorrow.
kcbrown:
This looks to be very interesting indeed, and I'm very much looking forward to seeing the videos you intend to produce.

A note about segmented memory in the Siglent: it's always on and available.  Whenever the amount of memory taken by a single capture frame is less than half of the available memory, you'll get at least 2 segments available to you.  The control you have over memory usage defines the maximum memory size of a captured frame.  The rest of memory will automatically be used for storage of additional segments, up to 90,000 total.  Some memory is needed for metadata about each frame, so the total number of segments you'll be able to capture is the total memory size in points divided by the capture size, minus some number.  With a capture size of 20M and a total number of points of 200M, you'll get 9 segments.  Similarly, with a capture size of 2M, you'll get 99 segments.  That will start to diminish somewhat past that, so, for instance, with a capture size of 200K, you get 994 segments.  In any case, the maximum number of segments scales roughly with the maximum number of points (100M or 200M for analog channels, depending on which channels you have active, and 50M for digital channels) divided by the capture size.

Note, too, that the capture size isn't guaranteed to be what you set it to in the acquisition settings.  That defines the maximum capture size.  The actual capture size can be less than that.  The scope will limit its capture to the amount of time represented by the screen, and since the maximum sample rate of the scope is 2GS/s, a small enough timebase will result in fewer points captured than the maximum capture size would otherwise allow.  When this happens, the scope will make more segments available to you.

The actual number of segments captured will, of course, depend on how many trigger events were captured between when you started the acquisition and when you stopped it.  The scope keeps the most recent captures, up to the maximum number of segments allowed by the memory and the actual capture size.

Because the segment system is always in use, sequence mode is not necessary for segment use.  The history function is always available, irrespective of whether or not you performed your capture using sequence mode.  The only purpose of sequence mode is to minimize the overhead that might otherwise reduce the waveform update rate.
Helix70:
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