摘要
用自行设计的自动电平控制前置放大电路取代原DF - 18会议分机的前置放大电路 ,使各会议分机的发言信号到达汇接机时 ,信号电平保持一致。
The self designed auto electrical level control preamp circuit is used to replace the original preamp circuit of AF-18 conference branch exchange so that the electrical level of the speaking signals from different branch exchanges can reach the same level when they come to the central system.
出处
《武钢技术》
CAS
2000年第6期5-7,共3页
Wisco Technology