User's Guide

3
Step 8 Unblock the carriers....................................................................................................7
Step 9 Ensure that the new CRFU module is functional..................................................7
Postrequisite.........................................................................................................................................7
1 Replacing the CRFU
This describes how to replace the faulty CRFU. The CRFU implements the
RF processing function of the BTS.
Prerequisite
 The following tools and materials are available: the ESD wrist strap, Phillips
screwdriver, ESD box or bag, torque wrench, and keys to the front panel and
cabinet door.
 The new CRFU is available. Ensure that it is intact and its hardware version
is consistent with the faulty CRFU.
Context
Figure 1-1 shows cable connections of the CRFU