Motorola SG4-DRT-2X Instrucciones de operaciones descargar pdf (Pagina 62)

3-34 Bench Setup and Operation

SG4000 Installation and Operation Manual

Figure 3-31 illustrates the plug-in board required for the 2X redundant return option. Jumpers

J5 and J6 are shown in the correct position. Jumper J6 enables signal flow to output connector J8

(TX2) when in the left-most position. If you are using only a single RF input, jumper

terminates input connector

J3 (IN2) when in the right-most position.

Figure 3-31

2X redundant return board

C15

C10

TERM

C11

C12

IN1IN2

TX2

TX1

R11

R13

R16

R10

C13

R12

C18

R14

R15

C16

C19

C14

C17

Figure 3-32 illustrates the signal flow through the 2X redundant return board.

Figure 3-32

2X redundant return – signal flow

Loss = 0.9 dB

-0.5 dB

-3.5 dB

+7.5 dB

-3.5 dB

TX2

TX1

IN2

IN1

To set up the 2X redundant return option:

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

2 Confirm that a 2X redundant return board is installed in return configuration locations 2

and 3, as illustrated in Figure 3-30.

3 Position J6 in the left-most position on each configuration board to enable the output to TX2.

4 Connect an RF cable from the 2X redundant return board in configuration location 2 to the

transmitters in lid optics slots 3 and 4.

5 Connect an RF cable from the 2X return redundant board in configuration location 3 to the

transmitters in 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.

6 Connect the appropriate return RF cables from the SG4-RF modules to each 2X redundant

return board.

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Motorola SG4-DRT-2X Instrucciones de operaciones Pagina 62

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