Signals Cont

™   Digital Signals In addition to being represented by Analog Signals, data can also be represented by a Digital signal ™   Bit Interval and Bit Rate Most  digital  signals  are  aperiodic  and  thus  Period  and  Frequency  are  not  the appropriate terms to describe them    Bit Interval (seconds)    Time required to send one single bit    Bit Rate (bps)    Number of bits sent per second Frequency Spectrum of a Digital Signal o    Frequency spectrum of a digital signal contains an infinite number of frequencies with different amplitudes o    Ideally  we  want  to  send  all  the  components  but  if  we  send  only  those  components whose   amplitudes   are   significant   ,  we   can   still   recreate  the   digital   signal   with reasonable accuracy at the receiver