User's Manual

Pre–Power–up Tests

SC 4812T CDMA BTS Optimization/ATP

May 2000

2-4

Objective

This procedure checks for any electrical short circuits and verifies the

operation and tolerances of the cellsite and BTS power supply units prior

to applying power for the first time.

Test Equipment

The following test equipment is required to complete the pre–power–up

tests:

 Digital Multimeter (DMM)

Always wear a conductive, high impedance wrist strap

while handling the any circuit card/module to prevent

damage by ESD.

CAUTION

Cabling Inspection

Using the site-specific documentation generated by Motorola Systems

Engineering, verify that the following cable systems are properly

connected:

 Receive RF cabling – up to 12 RX cables

 Transmit RF cabling – up to six TX cables

 GPS

 LFR

For positive power applications (+27 V):

 The positive power cable is red.

 The negative power cable (ground) is black.

For negative power applications (–48 V):

 The negative power cable is red or blue.

 The positive power cable (ground) is black.

In all cases, the black power cable is at ground potential.

IMPORTANT