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徒弟:请师傅接着介绍 RANDIX8320副机的电路结构。师傅:好!副机的电路较主机简单,电路如图9所示.其接收、解调、调制、发射电路的结构与主机完全一致。只是其部分参数有所不同。拨号电路由普通电话机拨号集成电路 UM91215A 及外围元件组成,它由电池直接供电;控制电路由机械开关和三极管 Q7组成,Q7控制发射电路及振荡电路的供电,完成单工与双工方式的转换;编码电路由 ED—9P 及外围元件组成,其工作在编码状态;导频信号产生电路是由 Q6组成的
Apprentice: Please master then introduce RANDIX8320 Vice machine circuit structure. Master: good! Vice machine circuit is simpler than the host, the circuit shown in Figure 9. Its receiving, demodulation, modulation, transmitting circuit structure and the host exactly the same. Only some of its parameters are different. The dialing circuit is composed of ordinary telephone dialing integrated circuit UM91215A and peripheral components. It is directly powered by the battery. The control circuit consists of a mechanical switch and a transistor Q7. The Q7 controls the power supply of the transmitting circuit and the oscillating circuit to complete the simplex and duplex conversion ; Coding circuit consists of ED-9P and peripheral components, which work in encoding state; pilot signal generation circuit is composed of Q6