Operating instructions

Bench Setup and Operation 3-37

SG4000 Installation and Operation Manual

Figure 3-34 illustrates the segmented return plug-in board.

Figure 3-34

Segmented return board

TX1

TX2

IN2 IN1

R10

C12 C12

C11

C10

R11

Figure 3-35 illustrates the signal flow through the segmented return board.

Figure 3-35

Segmented return board – signal flow

-0.5dB

Loss = 0.9 dB

TX1

TX2 IN2

IN1

Pad

To set up the segmented return option:

1 Confirm that return transmitters are installed in lid optics slots 3, 4, 5, and 6.

2 Confirm that a segmented return board is installed in the return configuration locations 2

and 3, as illustrated in Figure 3-33.

3 Connect an RF cable from the segmented return board in configuration location 2 to the

transmitters in lid optics slots 3 and 4.

4 Connect an RF cable from the segmented return board in configuration location 3 to the

transmitters is lid optics slots 5 and 6.

The RF cable should be approximately five inches long and have red boots on the connector

signifying the return path.

5 Connect the appropriate return RF cables from the SG4-RF modules to each segmented

return board.

In a typical installation, the RF modules in Ports 1 and 3 are connected to the segmented

return board in return configuration location 3. The RF modules in Ports 4 and 6 are

connected to the segmented return board in return configuration location 2.

6 Ensure that the PIC cable is properly connected to the lid and power distribution board in

the housing base.

7 Route and connect the fiber service cable.