Motorola SG2-DRT-3X ユーザーズマニュアル

8 

Continue to route the two cables alongside the PIC and under the fiber tray in the SG2000 
lid as illustrated in Figure 11. 

9 

Attach DR MCX 1 connector to RF 

INPUT

 

A

 and DR MCX 2 connector to RF 

INPUT

 

B

 on top of 

the SG2-DRT-3X (Figure 11). 

10 

Use tie straps to loosely secure the two cables to the PIC cable as an assist in cable 
management. 

11 

Confirm that the green LED (

ON

) located on the top panel of the SG2-DRT-3X is illuminated 

to confirm enable status. A delay of approximately 10 seconds before illumination is normal. 

12 

Review return-path system levels: 

 

Each input of the SG2-DRT-3X is configured to drive the laser to the recommended level of 
+15 dBmV. If available, use a test adapter cable to measure levels directly at the SG2 ICS 
board assembly. 

 

Use TP XMTR B to monitor the levels of the two combined ports. Pad XMTR B is used to 
adjust the level into the XMTR. 

 

Use the JXP TP return-path locations on the E-pack for the two ports that have been 
segmented. 

13 

Install a JXP-15 in the optical transmitter A pad location, illustrated in Figure 10. 

14 

Replace the E-pack cover, taking care not to pinch any cables. 

15 

Close the housing and use a torque wrench to progressively tighten the housing bolts to a 
final torque of 12 ft-lbs. in the sequence stamped on the housing lid. 

The SG2-DRT-3X transmitter can operate with three data streams. If you install the 
SG2-DRT-3X in an SG2000 that will remain a combined (1X) or split (2X) return, an additional 
cable is provided to properly load the transmitter. 

To properly cable the SG2-DRT-3X for a combined or split return: 

1 

Verify that the return path module is either an RPM/C combined (1X) or an RPM/S split 
(2X) model. 

2 

Insert the provided cable from the redundant transmitter’s D subconnector into RF 

INPUT 

A 

or 

INPUT 

B on the SG2-DRT-3X. 

3 

Change the 15 dB JXP pad at the XMTR A location to a 5 dB JXP.