Electrosurgical generator

An electrosurgical generator for generating radio frequency power, includes a radio frequency output stage having three or more output connections, and one or more sources of radio frequency output power coupled to the output stage. A controller causes the system to supply a first coagulating RF waveform to the output connections or a second cutting RF waveform to the output connections. The first RF waveform is delivered between a first pair of the output connections, and the second RF waveform is delivered between a second pair of the output connections. In a first mode of operation the controller supplies the first coagulating RF waveform, and in a second subsequent mode of operation the controller supplies the second cutting RF waveform for a first predetermined period of time followed by the first coagulating RF waveform for a second predetermined period of time, both periods being in excess of 1 second.