I have a 33612a dual channel WFG.
I want to work in the coupled two-channel mode, where the frequencies have a constant ratio (e.g. f1 = 2*f2). In addition, I want to add an amplitude modulation at some other lower frequency to one of the channels.
I get an error message when I try to do this. Is this something that the instrument can't do, or am I doing something wrong?