1-20 (No.RA018)Fig.4 Power supply circuit2.4.8 Signaling Circuit2.4.8.1 Encode (QT/DQT/DTMF/2-tone/MSK)Each signaling data signal of QT, DQT, DTMF, 2-tone and MSK is generated by IC702, superposed on a modulation signal and is sentto TX VCO and TX PLL IC.2.4.8.2 Decode (QT/DQT/DTMF/2-tone/MSK)The audio signal is removed from the FM detection signal sent to the IC702 and the resulting signal is decoded by IC702.Q7153AFF2(1A)IC8250AKEY Back Light, 3Color LED,8bit/16ch ADC, Universal I/FIC80150U Universal OptionIC3650C PLL, IF, VCOIC60130C ASSISTIC360SW ANTSWIC6350VCO Q110SW TX VCOQ210SW RX VCOIC6550T TX circuitIC6450R RX circuitInt AF AmpExt AF AmpQ32SB2 8bit ADCSBCSBCSBC5UCTXCRXCANTSWTXRX
