Instruction Manual
Table Of Contents
- Contents
- Figures
- Tables
- General Safety
- Introduction
- Preliminary Operations
- Optimization/Calibration
- Automated Acceptance Test Procedures (ATPs)
- Leaving the Site
- Basic Troubleshooting
- Data Sheets
- Test Matrix
- BBX Gain Set Point vs BTS Output
- CDMA Operating Frequency
- PN Offset/I & Q Register
- Test Equipment Preparation
- In-Service Calibration
- Index
BTS Equipment Identification – continued
Apr 2001
1-23
SC4812ET BTS Optimization/ATP — CDMA LMF
DRAFT
Sector Configuration
There are a number of ways to configure the BTS frame. Table 1-5
outlines the basic requirements. When carrier capacity is greater than
two, a 2:1 or 4:1 cavity combiner must be used. For one or two carriers,
bandpass filters or cavity combiners may be used, depending on
sectorization and channel sequencing.
Table 1-5: BTS Sector Configuration
Number of
carriers
Number of
sectors
Channel spacing Filter requirements
1 3 or 6 N/A Bandpass Filter, Cavity Combiner (2:1 or 4:1)
2 6 Non–adjacent Cavity Combiner (2:1 Only)
2 6 Adjacent Dual Band Pass Filter
2 3 Non–adjacent Cavity Combiner (2:1 or 4:1)
2 3 Adjacent Bandpass Filter
3,4 3 Non–adjacent Cavity Combiner (2:1 or 4:1)
3,4 3 Adjacent Cavity Combiner (2:1 Only)
The matrix in Table 1-6 shows a correlation between the various sector
configurations and BBX cards.
In Table 1-6, BBXs may be BBX2s or BBX–1Xs.
NOTE
1