User manual

37
2270 Fiber Optic Modem
3.8.2 External Station
The External Station is used when an external station clock is providing timing (see Figure 3-6).
When connecting KG or KIV encryptors together on the Black side, using an external timing
device you should install the external station clock strapped header in the J3 position. In this
application, the modems are acting as the network, although the timing input is from an outside
source. The modem in which the timing source is connected should be set for external and the
other modem set for slave. This header is provided with the interface.
Figure 3-6.
Programmable
Buffered Interface,
Model P53, Exter-
nal Station