Signals

• Signals


  Information travelling from one place to another
• Analog signals


  • Contain different frequencies
  • Amplitude varies.
• Digital signals 


  • Made up of binary digits (1's and 0's)
  • Only has 1 amplitude.
• Digital audios


  When we talk into a mobile device, an ADC converts the analogue signal from the microphone into a digital signal.
• Evaluating digital signals


  Strength) Carries more information in the same bandwidth.

  +Picks up, filters out interference much easier.

  
  

  Limitation) Signal processing takes time so there might be delay.