EXFO RTU 310-310G IP Services Test Head - Manual (Page 415)

System Tabs
Ethernet Test Module 403
Clock Synchronization
REF Out
Note: Ref Output is only available with RTU-310G, the REF OUT signal is
automatically enabled on the REF OUT port (SMA connector) when the
laser is turned ON.
Configuration

Divider Ratio: Allows the selection of the transmit test clock divider.
Choices are 16 and 32. The following table shows the corresponding
output frequency in MHz.
Divider
Ration
LAN transceiver
mode
WAN transceiver
mode
16 644.53 MHz 622.08 MHz
32 322.266 MHz 311.04 MHz