Which of the description about the position of the dispersion module in the signal flow is wrong?
A . If there is OAU board, DCM placed in the the TDC/RDC of OAU
B . If there is only one OBU board, DCM placed after OBU
C . If there are two OBU boards, the DCM is placed between the two OBUs.
D . Before OTM station originating OBU typically pre-fill 20KM in DCM
Answer: B