Yeah, I'm not saying it's good or bad to invert about 0V or the Offset voltage, but the instrument behavior does not agree with what the user manual says it should do.
User manual is wrong. I will report it.
Polarity flip is symmetrical around the 0V. It is multiplying voltage with -1.
The device is definitely wrong. There are lots of differential signalling protocols (LVDS, CAN and RS485 for example) which have a DC offset. With the way the SDG1000 is working right now, you can never generate such signals. IOW: the DC offset should be applied to both outputs in the same way, only the AC part of the signal should be inverted.
Don't arbitrarily invent things.
AWG is analog device, not digital pulse generator.
Hint: digital signals do not exist in the real world! If you want to generate any of the signalling protocols I listed before (especially for introducing analog domain errors), an AWG is the tool for that purpose.
You are changing a subject by introducing truisms.
I'm not introducing truisms. You are just so horribly wrong by being blinded by what you perceive as digital signals. You really need to seperate your thinking towards considering the output signal of an AWG as multiple components. For starters: A) a waveform and B) a DC offset. These are two very different things. When inverting the waveform, the phase is shifted by 180 degrees. The DC offset stays the same. On a decent AWG like the Tektronix AFG31000, you'll see that the waveform gets inverted but not the offset. As Tektronix has decades of experience with designing AWGs, you can rest assured they got this basic feature implemented correctly. What the SDG1032 is doing is inverting both the waveform and the offset which is the wrong thing to do.
No it is not.
It behaves differently.
I will repeat for 3rd time: Function is called INVERT POLARITY.
It inserts inverting unity buffer in signal chain. If you don't know what that is, you need to go read..
Phase shifting signal by 180° makes no sense for single signal. It is still the same. Only frame of reference changes and that makes sense only compared to second channel, and for that you have 180° phase delay command.
What you have on Tek does not create fully differential signal in analog sense. In analog sense differential pair is fully inverted including DC component of input signal. If you subtract both, you get same signal as positive one but twice the amplitude. Otherwise you get DC component subtracted out. Which is not the original signal.
What you are talking about is what digital differential drivers do: they have differential signal riding on the common mode DC offset. And that common DC offset is unwanted and gets suppressed. And I agree the way your Tek works makes it simple to do that.
And since this is something useful to you you that makes it the only way that is right...
How typical of you.
What Signal did wrong is that when you invert signal it won't show voltages as negative in GUI.
That is a mistake.
And to make sure I don't disagree that the way your Tek work is useful for some type of work. You can achieve same thing on Siglent now by Inverting and entering negative offset.
But being able to choose which way it should work would be nice.
And I did report this to Siglent, documentation errata, GUI not showing negative voltages when inverted, and also a request to add the way your Tek works as additional operational mode.
Which if they manage to add that mode, it will be able to do both what Tek can and what Tek cannot do...