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Signals (MLT-3 (three voltage levels, -1,0 +1, same line if same state,…
Signals
MLT-3
three voltage levels
-1,0 +1
same line if same state
different level if different state
digital to digital
starts on 0
FSK
digital to analogue
frequency shift keying
create own rules
MFSK
each signal represent two bits
Fc = carrier frequency or middle
Fd = difference in each signal
bandwidth
2x(number of signals - 1) x Fd
General
need vibrations otherwise signal will not pick up anything
CDMA
