The transmitting and receiving unit (5) converts the transmission analog baseband signal into a transmissionmodulation wave signal to output to the network.
发射和接收单元(5)将发射模拟基带信号转换为发射调制波信号，以输出到网络。
2
Photonics involves generation, modulation, transmission and processing of light.
光电学涉及光的产生、调制、传输和处理。
3
The digital transmission system Q factor-a new concept may be used to analyse the characteristics of digital transmission systems with different kinds of modulation.