... protecting and displaying the states of the main power, cooling water, magnetron, waveguide system, etc.2. General specificationsPower source: 380VAC +/-10%, 50Hz, 3 ... range: 0.5kW-5kW (continuously)Stability: output power variation of < +-1% (at 5kW output ) during power source variation of +-10%VSWR tuning range: > 20VSWR allowable ...