• 2022-06-07
    Modem is only used to convert digital signals into analog signals and transmit them on the line.
    A: 正确
    B: 错误
  • B

    内容

    • 0

      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

    • 1

      The module responsible for converting analog signals to digital signals is called________. A: BME280 B: CCS811 C: MQ-5 D: ADC

    • 2

      Which is the modulation and demodulation technology mainly used among the following communication modes? A: Analog channel transmits digital data B: Analog channel transmit analog data C: Digital channel transmit digital data D: Digital channel transmit analog data

    • 3

      analog signals

    • 4

      Analog signals are characterized by continuous electrical signals in both time and value. A: Correct B: Wrong