An electrosurgical generator includes: a power supply configured to output a DC waveform； a power converter coupled to the power supply and configured to generate a radio frequency waveform based on the DC waveform； an active terminal coupled to the power converter and configured to couple to a first electrosurgical instrument and a second electrosurgical instrument； at least one sensor coupled to the power converter and configured to sense at least one property of the radio frequency waveform； and a controller coupled to the power converter. The controller is configured to: determine a first impedance associated with a first electrosurgical instrument and a second impedance associated with a second electrosurgical instrument based on the at least one property of the radio frequency waveform； and adjust at least one parameter of the radio frequency waveform based on the first impedance and the second impedance.
