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Trace A represents the binary data source to be encoded into the 8-ary
signal.
Trace B is the encoded signal with the information rate kept
the same for both binary and 8-ary systems. The result is that the rate at which the
voltage state is varied on the channel is reduced by a factor of three. This translates
directly into a threefold reduction in bandwidth required to support communication.
Finally, trace C shows an 8-ary signal which has the same symbol
rate as the binary source and hence requires the same bandwidth, but the
information rate has been increased threefold.
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