User's Manual Part 1

Optimization Overview – continued

Apr 2001

1-3

SC4812ET BTS Optimization/ATP — CDMA LMF

DRAFT

These values are factored in by the BTS equipment internally, leaving

only site specific antenna feed line loss and antenna gain characteristics

to be factored in by the CFE when determining site Effective Radiated

Power (ERP) output power requirements.

Each C–CCP shelf BBX board is optimized to a specific RX and TX

antenna port. (One BBX board acts in a redundant capacity for BBXs

1–12, and is optimized to all antenna ports). A single value is generated

for each path, thereby eliminating the accumulation of error that would

occur from individually measuring and summing the gain and loss of

each element in the path.

When to Optimize

New Installations

After the initial site installation, the BTS must be prepared for operation.

This preparation includes verifying hardware installation, initial power

up, and GPS verification. Basic alarm tests are also addressed.

A calibration audit of all RF transmit paths is performed to verify factory

calibration.

A series of ATP CDMA verification tests are covered using the actual

equipment set up. An ATP is also required before the site can be placed

in service.

Site Expansion

Optimization is also required after expansion of a site.

Periodic Optimization

Periodic optimization of a site may also be required, depending on the

requirements of the overall system.

Repaired Sites

Verify repair(s) made to the BTS by consulting an Optimization/ATP

Test Matrix table. This table outlines the specific tests that must be

performed anytime a BTS subassembly or RF cable associated with it is

replaced.

Refer to Appendix B for detailed basic guideline tables and

detailed Optimization/ATP Test Matrix.

IMPORTANT