Digital oscilloscope and digital channel correction method for digital oscilloscope

The invention discloses a digital channel correction method for a digital oscilloscope and the digital oscilloscope. The method comprises steps of firstly carrying out zero level correction of a comparator of each digital channel so as to obtain a zero level overturning voltage of the digital channel; then acquiring the simulation trigger compensation time of each digital channel when the channel trigger source is simulated; obtaining the digital trigger compensation time of each digital channel when the digital channel is used as a trigger source; and finally, obtaining the mixed trigger compensation time of each digital channel when the analog channel and the digital channel are triggered in a mixed manner, and obtaining a mixed trigger correction parameter when the analog channel and the digital channel are triggered in a mixed manner according to the mixed trigger compensation time. As the mixed trigger compensation time is obtained according to the occurrence time of the first trigger signal of each digi