Absolutely not, the input coupling mode of the oscilloscope has AC, DC, if the measurement ripple must use AC coupling. AC is the measured signal through capacitive coupling to the preamplifier (isolated DC component); DC is directly coupled, DC coupling is used to measure DC, then the waveform will be biased out of the screen (AC, DC all to the pre-amplifier circuit, can not measure the ripple effect, the general ripple must be much smaller than DC).