CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 90)

90
Canoga Perkins
4.10.2 Model TW8
The signaling used on this interface is Mil-Std 188-114C. Four TwinAx connectors
(BJ-77, 3-lug) are used for the physical connection (see Figure 4-16).
A switch is provided to select whether the fourth TwinAx (SCT / SCTE) is to be
used as an output (SCT) or as an input (SCTE). By setting the switch to the SCT
position, the port becomes an output providing the clock to the connected device.
When set for SCTE, the port becomes an input and will accept a clock from the
connected device.
SCT should be selected if the modem is set for Internal or Slave Clock mode.
SCTE should be selected if the modem is set for External Clock mode.
NOTE: The SCT output cannot be returned on the SCTE leads to
eliminate propagation delay problems with this interface.
Figure 4-16.
Four TwinAx
Connectors
(BJ-77, 3-Lug)