Transponder bandwidth is the product of Modulation , Baud Rate and the Polarisation.
BW=Modulation x Baud x Polarisation
Following table will give an idea for various bit rates:-
Ex:
Modulation = 2 (bits/s/Hz)
Baud Rate = 32G
Polarisation= 2
BW= 2 x 32 x 2 =128Gbps
