User's Manual

Initial Power Up
08/15/2000
2-3
SC 4812ETL BTS Optimization/ATP
PRELIMINARY
Introduction
The following information is used to check for any electrical short
circuits and to verify the operation and tolerances of the cell site and
BTS power supply units before applying power for the first time. It
contains instructional information on the proper initial power up
procedures for the SC4812ETL. Please pay attention to all cautions and
warning statements in order to prevent accidental injury to personnel.
Required Tools
The following tools are used in the procedures.
S DC current clamp (600 Amp capability with jaw size to accommodate
2/0 cable).
S Hot Air Gun – (optional for part of the Alarm Verification)
S Digital Multimeter (DMM)
Cabling Inspection
Using the site-specific documentation generated by Motorola Systems
Engineering, verify that the following cable systems are properly
connected:
S Receive RF cabling – up to six RX cables
S Transmit RF cabling – up to three TX cables
For DC power applications (+27 V):
S The positive power cable is red.
S The negative power cable is black. (The black power
cable is at ground potential.)
IMPORTANT
*
Initial Inspection and Setup
Ensure all battery shelf circuit breakers (Figure 2-3) for
unused battery positions are off (pulled out) before and
during the entire power up process. Leave these breakers in
the off position when leaving the site.
CAUTION
Table 2-2: Initial Inspection and Setup
Step Action
1 Verify that ALL AC Load Center (ACLC) and DC Power Distribution Assembly (PDA) circuit
breakers are turned OFF.
2 Confirm that the external 220 Vac supply is correctly connected to the ACLC input.
2