User Manual

ManualsBrandsNokia Solutions and Networks ManualsElectronicsSC4812ET 1X/1X-EVDO @ 1.9 GHz CDMA BTS

Prepower-up

68P09255A57-2

Aug 2002

SC4812ET Optimization/ATP Manual Software Release R16.1.x.x

PRELIMINARY

2-4

Required Tools

The following tools are used in the procedures.

 DC current clamp (600 Amp capability with jaw size to accommodate

2/0 cable).

 Hot Air Gun - (optional for part of the Alarm Verification)

 Digital Multimeter (DMM)

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

NOTE

For positive power applications (+27 V):

 The positive power cable is red.

 The negative power cable is black. (The black power cable is

at ground potential.)

Initial Inspection and Setup

CAUTION

Ensure all battery breakers for unused battery positions are open

(pulled out) during any part of the power up process, and remain

in the off position when leaving the site.

Table 2-2: Initial Inspection and Setup

Step Action

1 Verify that ALL AC and DC breakers are turned OFF in both the Power and RF cabinets. Verify that

the DC power cables between the Power and RF cabinets are connected with the correct polarity

2 The RED cables connect to the uppermost three (3) terminals (marked +) in both cabinets. Confirm

that the split phase 240/120 AC supply is correctly connected to the AC load center input.

CAUTION

Failure to connect the proper AC feed will damage the surge

protection module inside the AC load center.

AC Power Check

The first task in the power up sequence is to apply AC power to the

Power cabinet. Once power is applied a series of AC Voltage

measurements is required.

Table 2-3: AC Voltage Measurements

Step Action

1 Measure the AC voltages connected to the AC load center (access the terminals from the rear of the

cabinet after removing the AC load center rear panel). See Figure 2-2.

2 Measure the AC voltage from terminal L1 to neutral. This voltage should be in the range of nominally

115 to 120 Vac.

. . . continued on next page