Question: With reference to the AD9911. I'm able to start a linear sweep on the primary channel 1, but I can't do that on any auxiliary channels. I wonder, is it possible to do the same function with all these Auxiliary channels
Answer: These Auxiliary channel do not have a DAC assigned, so it can not do sweeps, nor does it have a direct output, see AD9911 Rev. A data sheet page 18 bottom LHS.