User's Manual

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BTS Equipment Identification

PRELIMINARY

SC 4812ETL BTS Optimization/ATP

08/15/2000

1-14

Equipment Overview

The SC4812ETL BTS consists of a single, outdoor, weatherized cabinet

containing RF and power components. The BTS is functionally similar

to the two–cabinet SC4812ET, but provides more flexibility in site

selection because of its smaller footprint and lighter weight. The BTS is

two carriers in a 3–sector configuration. An SC4812ETL starter frame

with the maximum of one SC4812ETL expansion frame can support 4

carriers in a 3–sector configuration. Six– sector operation is not

supported with any SC4812ETL configuration.

The BTS cabinet houses the fan modules, RF compartment heat

exchanger, Simplified CDMA Channel Processor shelf (S–CCP), RF

Linear Power Amplifier (LPA) modules, LPA trunking modules,

bandpass filters, 2:1 combiners, and Duplexer/Receive Filter/Directional

Couplers (DRDC). Power components include a +27 Vdc Power

Distribution Assembly (PDA), backup batteries, battery heaters,

rectifiers, an AC Load Center (ACLC), and one duplex GFCI 115 Vac

utility outlet.

Logical BTS

A logical BTS can consist of up to two SC4812ETL frames. When the

LMF is connected to frame 1 of a logical BTS, access is available to all

devices in all of the frames that make up the logical BTS. A logical BTS

CDF file that includes equippage information for all of the logical BTS

frames and their devices is required. A CBSC file that includes channel

data for all of the logical BTS frames is also required.

The first frame of a logical BTS has a –1 suffix (e.g., BTS–812–1) and

the second frame of the logical BTS is numbered with the suffix, –101

(e. g. BTS–812–101). When the CDMA LMF is logged into a BTS, a

FRAME tab is displayed for each frame. If there is only one frame for

the BTS, there will only be one tab (e.g., FRAME–282–1 for

BTS–282). If a logical BTS has more than one frame, there will be a

separate FRAME tab for each frame (e.g. FRAME–438–1, and

FRAME–438–101 for BTS–438 that has both frames). If an RFDS is

included in the CDF file, an RFDS tab (e.g., RFDS–438–1) will be

displayed.

Actions (e.g., ATP tests) can be initiated for selected devices in one or

more frames of a logical BTS. Refer to the Select devices help screen for

information on how to select devices.

SCCP Shelf Card/Module Device ID Numbers

All cards/modules/boards in the frames at a single site, assigned to a

single BTS number, are also identified with unique Device ID numbers

dependent upon the Frame ID number in which they are located. Refer to

Table 1-2, Table 1-3, and Figure 1-4 for specific SCCP Shelf Device ID

numbers.