I have a customer that recently did an analysis of their system using the AD9958. The sweep ramp rate block timer (8 –bit) counts down from the loaded value to 1 according to the Rev. A data sheet. We are assuming that the total number of counts then is 255-1 = 254. Is this correct? They mentiond that they prefer a 256 count from the part, but want to verify they are reading the data sheet correctly?