Motorola SG4-DRT-2X ユーザーズマニュアル

10 

Figure 10 illustrates the plug-in board required for the 2X redundant return option. Jumpers 

J

5

 

and 

J

6

 are shown in the correct position. Jumper 

J

6

 enables signal flow to output connector 

J

8

 (Tx2) when in the left-most position. Jumper 

J

5

 terminates input connector 

J

3

 (

IN

2

) when only 

a single RF input is used. 

C15

R1

C9

C10

TERM

TERM

C11
R7

C12

R2

R1

1

C5

C4

R13

R16

R10

R4

C7

C8

C13

C6

R3

R8

R5

R1

2

C18

R1

4

R15

C16

C1

9

C14

C17

R6

C2

C1

C3

J5

J6

 

Figure 11 illustrates the signal flow through the 2X redundant return board: 

Loss = 0.9 dB 

J6

-0.5 dB 

-3.5 dB 

+7.5 dB 

-3.5 dB 

TX2

TX1 SM

J5 

IN2

IN1

 

To set up the split redundant return option: 

1 

Confirm that SG4-DRT-2X transmitters are installed in lid optics slots 3 and 4, and 5 and 6. 

2 

Confirm that a 2X redundant return board is installed in return configuration locations 2 
and 3 as illustrated in Figure 8. 

3 

Position 

J

6

 in the left-most position on each configuration board to enable the output to Tx2. 

4 

Connect an RF cable from connector TX1 on the 2X redundant return board in configuration 
location 2 to CH B of the transmitter in lid optics slots 3 and 4. 

5 

Connect a second RF cable from connector TX2 on the 2X redundant return board in 
configuration location 2 to CH B of the transmitter in lid optics slots 5 and 6. 

6 

Connect an RF cable from connector TX1 on the 2X return redundant board in configuration 
location 3 to CH A of the transmitter in lid optics slots 3 and 4. 

7 

Connect a second RF cable from connector TX2 on the 2X return redundant board in 
configuration location 3 to CH A of the transmitter in lid optics slots 5 and 6.