Manual

Use the Inter

nal configuration when the network equipment is set for Internal Timing (see Figure 3).

In this applic

ation, the modems act as the network timing source. When connecting KG or KIV

encryptors on the Black side, go to the Functional Configuration screen and set the interface

configuration parameters: set the operating mode to Internal, then set the Internal Rate, then set the

delay time; for details, see Section 4.7.

FIFO

RX Data

RX Clock

Delay Line

Internal

Clock

TX Clock

TX Data

RXD

SCR

SCT

SCTE

TXD

J1, DB-25

Figure 3. P53 Interface for Internal Clock

Use the External configuration when the network equipment is set for Network or Internal Timing

(see Figure 4). In this application, the modems act as an extension

of the Red side cable in a true tail

circuit. When connecting KG or KIV encryptors on the Red side to a DTE device, go to the

Functional Configuration screen and set the interface configuration parameters: set the operating

mode for the modem at the Red end to External and the modem at the DTE end to Slave; for details,

see Section 4.7.