WHAT’S THE PROBLEM WITH ANALOG?

 ANY type of waveform  Can be analog  Can be digital  Whatever can be used to communicate  Cables  Wifi  Radio  Satellite WHAT ARE SIGNALS?

 Distance – bad!  Noise – bad!  Conflicts with other signals (e.g. sound)  Electrical and magnetic fields  Radiation  Etc. ANALOG SIGNALS DEGRADE

 Signal-to-Noise Ratio Signal Noise  Increase signal  amplifiers  Decrease noise  shielding and filters HOW DO WE MEASURE SIGNAL QUALITY?

 Only worry about 2 different values  HIGH and LOW  Digital signals are still affected by noise  Errors can be detected and corrected DIGITAL SIGNALS ARE AWESOME

 Test out different length audio cables  3 ft. vs 50 ft  Anybody use a audio cassette/car adapter?  How do you improve the quality? AUDIO SIGNAL EXAMPLE

 Old school television  Morning announcements  UGH VIDEO SIGNAL EXAMPLE

 DVI = Digital Video Interface  Best Buy – Monster DVI Cable - $80 Best Buy – Monster DVI Cable  Generic DVI Cable - $6 Generic DVI Cable MONSTER CABLE SCAM