... RS232 interface, Frequency Counter, Power AmplifierOutput A Characteristics WAVEFORMWaveform type 32 kinds, such as Sine, Square, Triangle, Pulse ... )( high impedance,1kHz,sine)Amplitude Flatness ±5% (<10MHz), ±10% (>10MHz)Amplitude stability ± 0.5%/ 3 hoursOutput impedance 50 ... high level >4VGENERAL CHARACTERISTICSPower Supply: AC220V (1±10%)AC110V (1±10%) (Pay attention to the voltage selection on rear ...