WHAT’S THE PROBLEM WITH ANALOG?

ANY type of waveformCan be analogCan be digitalWhatever 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 amplifiersDecrease 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 noiseErrors 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 televisionMorning announcements

UGH

VIDEO SIGNAL EXAMPLE

DVI = Digital Video InterfaceBest Buy – Monster DVI Cable - $80Generic DVI Cable - $6

MONSTER CABLE SCAM