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
Bay Level Offset Calibration68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
3-87
from 2500 to 27500 (2500 corresponds to –125 dBm and 27500
corresponds to +125 dBm).
– The ten calibration points for each slot–branch combination must be
stored in order of increasing frequency. If less than ten points
(frequencies) are calibrated, the BLO data for the highest frequency
calibrated is written into the remainder of the ten points for that
slot–branch.
Example:
C[1]=384
(odd cal entry)
C[2]=19102 (even cal entry)
C[3]=777 (odd cal entry)
C[4]=19086 (even cal entry)
C[19]=777 (odd cal entry)
C[20]=19086 (even cal entry)
.
.
.
= 1 “calibration point”
= 1 “calibration point”
= 1 “calibration point”
In the example above, BLO was measured at only two frequencies
(channels 384 and 777) for SCCP slot BBX–1 transmit (Table 3-32).
The BLO data for the highest frequency measured (channel 777) will
be written to the remaining eight transmit calibration points (defined
by entries C[5] through C[20]) for BBX–1.
Slot Block Temperature Compensation – Each BBX slot Block also
has a temperature compensation data section (TempLevelCal) where
power level compensation factors for temperature variations are stored.
CAL File and BLO Data Download
When BLO data is downloaded to the BBXs after calibration, the data is
downloaded to the devices in the order it is stored in the CAL file. TX
calibration data (entries C[1] – C[60]) are sent first. Data for the ten
BBX slot 1 calibration points (entries C[1] – C[20]) are sent initially,
followed by data for the ten BBX slot 2 calibration points (entries C[21]
– C[40]), and so on. The RX calibration data is sent next in BBX slot
sequence, followed by RX Diversity calibration data.