Early television transmitters commonly use analog control system in which the electric power distribution of traditional relay components is controlled by the logic control system of discrete components .

早期的 电视发射机普遍采用模拟控制系统，即由分立元件电子线路实现逻辑控制功能，由它对传统 继电器组成的供配电 系统进行联锁控制，进而 实现对发射机整机的控制功能。