Comtech EF Data SDM-650B - Manual (Page 100)

Configuration SDM-650B Satellite Modem
3–58 Rev. 5
3.6.2.2 Master/Master (Station Clock)
Care should be taken when using this mode. Make sure that the station clock is also used
to synchronize the transmit data. Phasing problems may also occur between the transmit
data and the station clock input. For this reason, it is better to use the TERR clock on
transmit.
Refer to Figure 3-21 for a diagram of the master/master station clock configuration.
Figure 3-21. Master/Master Station Clock Configuration Diagram