... 470-860MHz, double side band).2. Intermediate frequency, one time conversion frequency, low side-band interfere.3. MCU ... technique is applied to audio intermediate frequency, video high frequency process and RFlocal oscillator, with high stability ... % audiofrequencyinput level-10 ~ 10 dBminput impedance10KΩ min.frequency response± 1dBdistortion1 %signal to noise ratio-60dBAudio and video ...