There is no option on this scope, I double-checked. Maybe the standard -A options aren't listed there. I do have FFT and it would stand to reason that this TDS544A only has standard options since they are very cheap where I work. Firmware is V3.4e Serial number is B010956 Date code of most ICs including NVRAM is 1993 Didier, could you please add that info to the file somehow? Thanks, ST