@tautech yes exactly, i tested all functions before firmware flashing. it was ok.
@tv84 i flashed "SDG1000-V100R001B01D01P31.ADS" the result is same :
- in sinus mode, no output ony 5V dc offset
- in square mode, i have some weird signal. the frequency is ok but amplitude is constant and when i adjust under 1 volt, the wave goes negative. i also don't have any other arb waveforms on both channels.