Have you tried selecting an unmodulated Arb waveform first, via the ARWV command, then setting a modulated mode with the parameter-less ARB as the modulation source? Maybe the SDG remembers the last used Arb waveform and uses that for modulation?
>>C1:ARWV?
C1:ARWV NAME,custom.bin
>>>>C1:MDWV?
C1:MDWV STATE,ON,DSBAM,MDSP,ARB,SRC,INT,FRQ,0.1610824742HZ,CARR,WVTP,SINE,FRQ,28121000HZ,AMP,0.005V,AMPVRMS,0.0017675Vrms,OFST,0V,PHSE,0
Just a wild guess -- I don't have my SDG2042X here at the moment. And you might have said in your first post on this topic that you tried this without effect; not sure I understood that part right.
Edit: A related question: When you set the MDWV mode via "C1:MDWV DSBAM,MDSP,ARB", which Arb waveform does the generator use as the modulation source?
I was just trolling through the SDG2000X firmware and noticed the name "BK Precsion" [sic]. I had not seen that mentioned here in relation to the Siglent AWGs. A quick look a the BK Precision website shows a number of AWGs that look a lot like our Siglent here. Judging by the specs, they are not 2000X models (500MSps/14-bit). But there is little doubt Siglent made a bunch of their current models.
I was just trolling through the SDG2000X firmware and noticed the name "BK Precsion" [sic]. I had not seen that mentioned here in relation to the Siglent AWGs. A quick look a the BK Precision website shows a number of AWGs that look a lot like our Siglent here. Judging by the specs, they are not 2000X models (500MSps/14-bit). But there is little doubt Siglent made a bunch of their current models.
What about their AC power supplies? I've wanted something like this for a while:
https://www.bkprecision.com/products/power-supplies/9801-programmable-ac-power-source.html
but the price was a bit hard to justify. If it's just a rebrand and is available somewhere else for cheaper, I'd be delighted!
I tried to search, but could not find an answer: is it possible to use one channel of SDG2042X as a modulation source for other channel without running a cable from its output to AUX input? If it is - what are the appropriate menu options to configure that?
Can an sdg2000x use a sinewave as an external clock source?
Can an sdg2000x use a sinewave as an external clock source?
Yes.
Is there any advantage or disadvantage to using sine or square wave?
Is there any advantage or disadvantage to using sine or square wave?The answer depends on the internal architecture.
I haven't tried it on the Siglent SDG yet, but in most other cases (AWGs and RF-signal generators) high spectral purity and low phase noise of the output signal could only be achieved with a pure sine wave as reference signal in my experience. So my general rule is using the purest possible sinewave as reference for any form of signal generators, whereas a squarewave is fine for digital gear like frequency counters.
Is there any advantage or disadvantage to using sine or square wave?
I have a simple question that I can't find answer to in the manual--how do you turn the modulation function OFF??? It seems that once on it stays on....
I have a simple question that I can't find answer to in the manual--how do you turn the modulation function OFF??? It seems that once on it stays on....
Push the modulation button again.
I haven't tried it on the Siglent SDG yet, but in most other cases (AWGs and RF-signal generators) high spectral purity and low phase noise of the output signal could only be achieved with a pure sine wave as reference signal in my experience. So my general rule is using the purest possible sinewave as reference for any form of signal generators, whereas a squarewave is fine for digital gear like frequency counters.
I haven't tried it on the Siglent SDG yet, but in most other cases (AWGs and RF-signal generators) high spectral purity and low phase noise of the output signal could only be achieved with a pure sine wave as reference signal in my experience. So my general rule is using the purest possible sinewave as reference for any form of signal generators, whereas a squarewave is fine for digital gear like frequency counters.
Is that really so? Today's function generators and AWGs are "digital gear" too. Do they really care about the harmonics in a square trigger signal, as long as the edges are well-defined?
The problem with square wave signals is that they usually come from some digital circuitry, where the propagation delay and switching times are not absolutely constant due to crosstalk and noise. This is why pure signals with low phase noise require a continuous (sine) wave reference rather than a switched (digital) signal with its unavoidable jitter components.
sine wave has slow slope, it means that slope will move through zero level very slowly and if there is any small amplitude noise, it will leads to jitter. Square wave has fast slope, so it moving through zero level very fast and small amplitude noise doesn't affects it much. Isn't it?
The only way to find the ultimate answer to what provides the cleaner output for a particular instrument is to try it out…
The only way to find the ultimate answer to what provides the cleaner output for a particular instrument is to try it out…
Would you consider trying it out on an sdg2000x series unit?