User's Manual
Table Of Contents
- Contents
- Chapter 1 Introduction
- Chapter 2 Preliminary Operations
- Chapter 3 Optimization/Calibration
- Introduction to Optimization and Calibration
- Preparing the LMF
- Overview of Packet BTS files
- LMF Features and Installation Requirements
- LMF File Structure Overview
- LMF Home Directory
- NECF Filename Conventions and Directory Location
- LMF Installation and Update Procedures
- Copy BTS and CBSC CDF (or NECF) Files to the LMF Computer
- Creating a Named HyperTerminal Connection for MMI Communication
- Span Lines - Interface and Isolation
- LMF to BTS Connection
- Using the LMF
- Pinging the Processors
- Download the BTS
- CSM System Time - GPS & LFR/HSO Verification
- Test Equipment Set-up
- Test Set Calibration
- Background
- Calibration Procedures Included
- GPIB Addresses
- Selecting Test Equipment
- Manually Selecting Test Equipment in a Serial Connection Tab
- Automatically Selecting Test Equipment in the Serial Connection Tab
- Calibrating Test Equipment
- Calibrating Cables Overview
- Calibrating Test Cabling using Communications System Analyzer
- Calibrate Test Cabling Using Signal Generator & Spectrum Analyzer
- Setting Cable Loss Values
- Setting TX Coupler Loss Value
- Bay Level Offset Calibration
- Purpose of Bay Level Offset Calibration
- What is BLO Calibration?
- Component Verification During Calibration
- When to Calibrate BLOs
- BLO Calibration Data File
- Test Equipment Setup for RF Path Calibration
- Transmit (TX) Path Calibration Description
- TX Calibration and the LMF
- TX Calibration
- All Cal/Audit and TX Calibration Procedure
- Download BLO Procedure
- Calibration Audit Introduction
- TX Path Audit
- TX Audit Test
- Create CAL File
- RFDS Set-up and Calibration
- Alarms Testing
- Chapter 4 Automated Acceptance Test Procedures
Power Removal
68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
2-16
Power Removal
Introduction
Power removal from an SC4812T Lite BTS frame is accomplished in the
following two–stage sequence:
1. DC power removal
2. AC power removal
Some maintenance, upgrade, or other activities may only require
removing DC power. In those situations where all power must be
removed from a frame, shutting down AC power will also be required.
Remove DC Power
If it becomes necessary to remove DC power from the frame, refer to
Figure 2-4 and follow the procedure in Table 2-9.
Table 2-9: DC Power Removal
Step Action
1 Set all DC PDA circuit breakers to OFF (pulled out) in the
following sequence:
1. PA (four circuit breakers, labeled 1A–1B through 3C–3D)
2. PILOT BEACON
3. HEAT EXCHANGER (two circuit breakers)
4. ETIB
5. OPTIONS
6. PS1 and PS2
7. MAIN BREAKER
2
n WARNING
The surge capacitors in the DC PDA will store a large
electrical charge for long periods of time. Failure to discharge
these capacitors as specified in this step could result in serious
personal injury or damage to equipment.
On the DC PDA, set the PS1 and PS2 circuit breakers to ON
(pushed in), and wait at least 30 seconds.
3 Set the DC PDA PS1 and PS2 circuit breakers to OFF.
4 Set the MAP power switch to OFF.
2