QAM 256 CATV Meter Signal Level Meter Spectrum, MER, BER , Tilt , Channel Power, A/V, C/N, ... Average Power, Trunk line Voltag RY-1127D signal level meter is mainly used for analog and digital television network construction ... batteryAC Supply:AC 90V-220V 50Hz-60HzWorking time6hCharging time3h QAM256 CATV Signal Level Meter