User's Manual Part 1

Compact Combined Linear Power Amplifier Installation – continued

DRAFT

1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU

Jun 2004

4-14

DC Power Connection

Procedure

A +27 VDC power source is required to supply the cCLPA. Follow the

procedure in Table 4-8 to attach the DC Power cable to the cCLPA.

Table 4-8: Procedure to Attach DC Power Cable to the cCLPA

Step Action

1 Set DC Power source circuit breaker to OFF.

2 Route cable (F) from DC Power source to the cCLPA. See Figure 4-10

3 Remove 8 screws securing I/O Panel cover and remove.

4 Route cable through connector to DC Power Terminal Block. See Figure 4-10.

5 If not already loosened, loosen DC Power Terminal Block screws.

6 Strip approximately 12 mm (1/2–inch) of sheathing from the end of each wire.

7 Insert the ”+” wire (red) into the “+” opening of the DC Power Terminal Block, then secure it by

tightening the screw. Torque screw to 2.3 N–M (20 in–lbs).

8 Perform step 6 for the “–” wire.

9 Insert the “–” wire (blue) into the “–” opening of the DC Power Terminal Block, then secure it by

tightening the screw. Torque screw to 2.3 N–M (20 in–lbs).

10 If the Data Cable is not installed, proceed to Table 4-11; otherwise, proceed to Table 5-6 for

Pre–Power up Test.