User's Manual

ADCP-75-348 • Issue 1 • 04/2008

Page 34

Figure 25. DART Card Replacement/Installation

7.5.2 Install New DART Card

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 another DART Card is being

added the HU.

3. Determine slot location of the new DART Card. Remove blank panel from the front of the

HU.

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

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

6. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxial

communications cable (RG-400 or equivalent) for all coaxial connections.

7. Route the forward and reverse path coaxial cables between the HU and the BTS interface

(per system design plan) and cut to the required length. Allow sufficient slack for dressing

and organizing cables at the HU and for installing an external attenuator in the forward

path link.

8. Terminate each cable with an QMA-type male connector following the connector

supplier’s recommendations.

9. If required, install an external attenuator in the forward path.

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.

22401-A