In order to increase the transmission distance of the analog transmission system, what equipment should be used?
A: Bridge
B: Amplifier
C: Router
D: Switch
A: Bridge
B: Amplifier
C: Router
D: Switch
举一反三
- The signal transmission portion of the analog video surveillance system is responsible for the upstream transmission of the video signal and the downstream transmission of the control signal. ( ) A: 正确 B: 错误
- In order to reduce the influence of transmission elements on<br/>transmission accuracy, () transmission should be adopted. A: Deceleration B: Isokinetic C: variable speed D: Speed up
- (10 points) In order to reduce the influence of transmission elements on transmission accuracy, () transmission should be adopted. A: speed up B: deceleration C: isokinetic D: variable speed
- 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
- When a digital signal is transmitted in an analog transmission system, what are required at the transmitting and the receiving ends respectively? A: Modulator and Demodulator B: Demodulator and Modulator C: Encoder and decoder D: Decoder and encoder