For some ADC DC static test, DC voltage instead of sinewave signal is needed.
Can QA403 output DC voltage? How to do that with GUI?
Thanks.
It’s an audio analyzer, not a precision DC voltage source.
Precision voltage and current calibrators are available to buy for that task.
Many types of audio analyzers can output DC voltage.
Sine QA40X supports DC offset on sinewave signal, it may have the capability to output DC voltage from hardware perspective (by enabling DC offset and disable AC signal).
If that’s true, I stand corrected. 
Some analyzers can measure DC (the A/D is either DC coupled or AC coupled like a scope) but I was not aware of an audio analyzer that deliberately can output a variable DC source into a device.
If I want to send DC into an amplifier or preamp, it’d only be to check DC protection and only on gear where it was truly a DC-daylight design with no coupling capacitors at all. And I’d use a precision variable current/voltage injector to do that.
Any DC offset eats up you ADC range in any case.