The LDX21 Fibre Optic Line Driver can be operated in three distinct modes , master internal clock, master external clock and slave.

To access switches undo screw and remove lid

The units must be used in pairs. One of the units in each pair must be set up to operate in slave mode (usually the remote unit). The other unit of the pair must be set up to operate as a master and can be set to operate using its own internal clock as the system clock or to receive an external clock from the system.

When connecting the fibre optic cables to the unit ensure that the Tx of the master is connected to the Rx of the slave. The Rx of the master connects to the Tx of the slave.

2 Transmit Data ( + ) Output

3 Indicator Signal ( + ) Output

4 Receive Data ( + ) Input

5 Control Signal ( + ) Input

6 Bit Level Clock ( + ) Input/Output

7 Byte Level Clock ( + ) Input/Output

8 Ground

9 Transmit Data ( - ) Output

10 Indicator Signal ( - ) Output

11 Receive Data ( - ) Input

12 Control Signal ( - ) Input

13 Bit Level Clock ( - ) Input/Output

14 Byte Level Clock ( - ) Input/Output

15 Not connected