User's Manual Part 2

ADCP-75-348 • Issue 1 • 04/2008

Page 33

10. Plug Network and Craft RJ-45 plugs into the connector on the SeRF Card. Make certain

the pigtails are inserted in the correct SFP.

11. Notify the NOC or alarm monitoring system operator that the system is back in operation.

7.5 DART Card Replacement/Installation Procedure

Each DART Card provides an interface between the SeRF and the Power Amplifier they are

spectrum specific. When additional service is needed another DART Card can be added to the

HU and the corresponding cover added to a Remote Unit. Individual DART Cards may be

replaced without disrupting service to the entire remote system. Only the RF spectrum of the

DART Card being removed is affected. Refer to Figure 25.

7.5.1 Replacement

1. Before working on the HU or handling a DART Card, slip on an Electro-Static Discharge

(ESD) wrist strap and connect the ground wire to an earth ground source. Wear the ESD

wrist strap while completing each section of the fan installation procedure.

2. Notify the NOC or alarm monitoring system operator that the DART Card is being

replaced.

3. Disconnect REF IN and OUT cables from the front of the DART Card.

4. Loosen the two thumb screws that secure the DART Card to the front of the HU enclosure.

5. Carefully withdraw the DART Card from the enclosure.

6. Slide replacement DART Card into the HU chassis until it is firmly seated.

7. Secure the DART Card to the front of the enclosure using the two thumb screws loosened

in Step 4.

8. Connect REF IN and OUT cables to the front of the DART Card.

9. Notify the NOC or alarm monitoring system operator that the system is back in operation.

Warning: Electronic components can be damaged by static electrical discharge. To prevent

ESD damage, always wear an ESD wrist strap when working on the HU and when handling

electronic components.