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

--- Quote from: RBBVNL9 on March 27, 2022, 08:25:43 pm ---Hi Cesare, thanks for the comments, and information on the specific file that the scope is looking for when that error pops up. My current thinking is that the BIN file might you identified is not, as you suggest, an executable file that needs to be launched, but instead a waveform data file (Siglent can save waveforms as Binary (BIN) as well as CSV and matlab). I tried to save a BIN file with that specific name from the device interface itself but I don't seem to be able to get to that specific folder the scope is looking into. Perhaps a TELNET session allows us to move a file there.  Something we should dig deeper into!

--- End quote ---

Yes of course, silly me, it'll be expecting a BIN waveform file.

The built-in standard waveforms are stored on the scope in /usr/bin/siglent/config/arb, if I copy one of these to the specified .bin filename, all of a sudden selecting the stored/channel arb waveform works (well, it works in the sense that it loads the waveform i've copied). So i ran:

# cp /usr/bin/siglent/config/arb/18_sinc_ram.bin  /usr/bin/siglent/usr/AWG_channel_wave.bin

And then selecting stored/channel pops me up with a sinc waveform.

So this does indeed feel like an incomplete feature - i'm guessing there is a missing stage where the channel is chosen and data is written to this directory with the given name. I'm assuming they do this to persist the waveform, so that, for example, if you disable and re-enable the AWG you get back your previously used waveform.


RBBVNL9:
Dear Egonotto,


--- Quote ---I think they mean the frequency is max 10 MHz and 250 Ms/s.
--- End quote ---

Yes, that does make sense. The sample rate indeed needs to be more way than the 10 MSa/s R&S mention in the specifications in order to output the waveform you show (and assuming it would be the same on the RTB as the RTA). I agree with you it is likely the same 250 MSa/s as used for the regular waveform generation. Will update my overview document. Thanks for checking!
RBBVNL9:
Dear Cesare,


--- Quote ---So i ran:

# cp /usr/bin/siglent/config/arb/18_sinc_ram.bin  /usr/bin/siglent/usr/AWG_channel_wave.bin

And then selecting stored/channel pops me up with a sinc waveform.
--- End quote ---

Good to know! The first next thing to try is to copy an actual waveform saved from an analogue channel to the right location and with the right name and see if that works too (while the build-in ATB waveforms may be optimized for 16kpts, a BIN saved from a measured waveform will be much, much larger and the ARB will need to have some strategy to reduce that to 16kpts).

The second next thing is for Siglent to fix this in the scope so we would not need a telnet session to make an advertised function work...
cesare:
I've tried different size files captured from the device, written to USB and copied across to the right place, and no, these aren't correctly loaded. This doesn't surprise me, I imagine the missing stage is where this would happen.

As you say, it's a missing feature, Siglent need to resolve this. The overall feel of the AWG is that it's just about enough to get by with, but given the licence cost is approaching that of a SDG1032X with dual channels it does seem an odd set of features with odd omissions. It does feel like the software is limiting what the hardware is capable of, although maybe the missing modulation and sweep options suggest the hardware is quite compromised? I don't know how the SDS5000 compares for example.
seronday:
@RBBVNL9,
   It is possible to transfer a waveform from one of the vertical channels to the Arbitrary Waveform Generator.

This is done from the vertical channel menu dialog box.
One of the menu items is  " Apply To ".
Selecting " Apply To ", brings up a list of options, one of these is ARB.
This copies the current channel waveform to the Arbitrary Waveform Generator.

You can then go to the Arbitrary Waveform Generator and select "Stored" and then " Channel' to output the waveform.

This is mentioned in the User Manual in section 12.2, Channel Setup,  but the way it is explained is somewhat confusing.

Regards.
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