函数信号发生器DF1642C POWER FUNCTION GENERATOR DF1642C COUNTER INPUT POWER FREQUENCY FUNCTION SYM DC OFFSET AT(dB) OUTPU ●60 OH RANGE AMPL OUTPU 600kHz 旧 FUNCTION GENERATOR DF1642C COUNTER产u严 POWERI FREQUENCY(Hz) 千 UNCTION SWEE OUTPUT o DC OFFSET O E SPEED函数信号发生器DF1642C