5.26.4.4. AMOs LWPAR & SYSPAR 
The AMOs LWPAR and SYSPAR are used to set parameters effecting synchronization.
The "Master" parameter, however, is not used for synchronization but
for master/slave assignment for layer 2.
The "SMD" parameter, on the other hand, effects synchronization. If
SMD = YES this record will never supply the reference clock, even though
it has a certain priority in the REFTA and would have been selected by
the safety equipment.
The "Qual" parameter switches the CRC safety for the 2 Mbps frame
on. This enables monitoring of the bit error rate and allows switch-off
after 10 SESs, for instance.