analog digital bandwidth
In analog design the concept of bandwidth as we
all know is related to the frequency at which the
output will drops it's power by 1/2 the maximum.
In digital the bandwidth is nothing but the bit rate
possible through the channel .. it is wrong terminology
to use but the comp science ppl can't help stealing
analog ppl's vocab .. anyway the maximum bits
per second is related to the analog bandwidth by
the very famous relation given by Shanon .. i.e.
C = BW * log_2 ( 1 + S/N)
Where
C = Channel capacity in Bits per secodn
BW= Analog bw available in channel
S/N = Signal to Noise ration
but sill the bandwidth in Digital depends on several
things like signal format like RZ, NRZ and Manchester etc..