Motorola SG4-DRT-2X Instruções de Operação descarregar pdf (Página 53)

Bench Setup and Operation 3-25

SG4000 Installation and Operation Manual

Figure 3-22 illustrates the combined return board required for the combined return

configuration. Jumpers

J3, J6, and J9 are shown in the normal default position. Jumper J9

enables/disables the signal flow to output connector

J10 (TX2). Jumper J9 is shown in the upper

position to terminate the output connector path to TX2. The RF output to TX1 is connected to a

single return transmitter in lid optics slot 4.

Figure 3-22

Combined return board

C15

C13

C11

J12

IN2

IN4

IN3

TX1

J11

TX2

J10

IN1

R21

R15

R14 R13

R12

R9R10

C10

Figure 3-23 illustrates the signal flow through the combined return board.

Figure 3-23

Combined return board – signal flow

Loss = 0.9 dB

-0.5 dB

-3.5 dB

+11 dB

-3.5 dB

Tx2

Tx1

In1

In3 In4

In2

To set up the combined return option:

1 Confirm that a single transmitter is installed in lid optics slot 4.

2 Confirm that a combined return board is installed in the lid board in return configuration

board location 2, as illustrated in Figure 3-21.

3 Position J9 in the upper position to terminate the output to TX2.

4 Connect an RF cable from the combined return board output (TX1) to the transmitter input.

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 the combined return

board.

6 Position jumpers J3 and J6 as required by the number of active inputs you are using.

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 107 108

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Motorola SG4-DRT-2X Instruções de Operação Página 53

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