中国大学MOOC: Digital transmission does not need to have _________ S/N ratio (信噪比) as analog (模拟) transmission.
举一反三
- Generally speaking, digital transmission can get higher signal quality than analog transmission, because? A: The repeater can regenerate digital pulses to remove signal distortion, and the amplifier amplifies the analog signal as well as the analog signal distorted B: Digital signals are smaller than analog signals and are not prone to distortion C: Analog signals are continuous and are not prone to distortion D: Digital signal is easier to sample than analog signal
- Analog signals may cause distortion such as graininess or snow in the case of video transmission and static or other background distortion in the case of audio transmission.
- translate chinese into english1. 数字通信 A: digital communication B: digital transmission C: transmission path
- Transmission ratio indicates both ______ and ____.
- The transmission rate of the binary digital transmission system is 2400B,then the transmission bit rate is ____;if the system is hexadecimal, with the same symbol rate, the transmission bit rate is ____. A: 2400 bit/s, 2400 bit/s B: 2400 bit/s, 4800 bit/s C: 2400 bit/s, 9600 bit/s D: 4800 bit/s, 9600 bit/s