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
RFDS – Fault Isolation – continued
DRAFT
SC4812ET BTS Optimization/ATP — CDMA LMF
Apr 2001
6-20
All tests fail on a single
antenna
If all path failures are on one antenna port, forward and/or reflected,
make the following checks.
Table 6-27: RFDS Fault Isolation – All tests fail on single antenna path
Step Action
1 Visually inspect the site interface cabinet internal cabling to the suspect directional coupler antenna
port.
2 Verify the forward and reflected ports connect to the correct RFDS antenna select unit positions on the
RFDS backplane. Refer to the installation manual for details.
3 Visually check ASU connectors (both board and backplane) for damage.
4 Replace the ASU with a known good ASU.
5 Replace the RF cables between the affected directional coupler and RFDS.
NOTE
Externally route the cable to bypass suspect segment.
6