I'm trying to use the DRG mode in the AD9910 DDS to generate amplitude ramps. So far it works well and, as expected from the datasheet, all ramps start at the lower limit. I would like to know if there's some way to start these ramps at the largest amplitude (without going first through the smallest amplitude, i.e., a falling amplitude ramp).
I've already used this mode to produce frequency ramps starting at the largest frequency (using the image frequency method). Is there an equivalent "image amplitude" method?