Digital transmission
The advantage of digital transmission over analogue transmission
is the ability to add redundant information (e.g. for error detection
and correcting purposes) to the true information stream.
The digital transmission is not so sensitive for interference
as the analogue transmission.
The binary representation of the signal can be transmitted,
for example, by frequency modulation when a frequency
F1 represents the binary digit ‘0’ and a frequency F2
is associated with the binary ‘1’.
The bit stream format and ordering are part of the transmission
protocol between the transmitter and the receiver.