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
CSM System Time – GPS & LFR/HSO Verification
68P64115A18–1
Mar 2003
1X SC 4812T Lite BTS Optimization/ATP Software Release R2.16.1.x
DRAFT
3-52
Table 3-19: GPS Initialization/Verification
Step Action
7
If steps 1 through 6 pass, the GPS is good.
NOTE
If any of the above mentioned areas fail, verify that:
– If Initial position accuracy is “estimated”
(typical), at least 4 satellites must be tracked and
visible (1 satellite must be tracked and visible if actual lat, log, and height data for this site has
been entered into CDF file).
– If Initial position accuracy is “surveyed,”
position data currently in the CDF file is assumed to be
accurate. GPS will not automatically survey and update its position.
– The GPS antenna is not obstructed or misaligned.
– GPS antenna connector center conductor measureS approximately +5 Vdc with respect to the
shield.
– There is no more than 4.5 dB of loss between the GPS antenna OSX connector and the BTS frame
GPS input.
– Any lightning protection installed between GPS antenna and BTS frame is installed correctly.
8
Enter the following commands at the CSM> prompt to verify that the CSM is warmed up and that GPS
acquisition has taken place.
debug dpllp
Observe the following typical response if the CSM is not warmed up (15 minutes from application of
power) (If warmed–up proceed to step 9)
CSM>DPLL Task Wait. 884 seconds left.
DPLL Task Wait. 882 seconds left.
DPLL Task Wait. 880 seconds left. ...........etc.
NOTE
The warm command can be issued at the MMI port used to force the CSM into warm–up, but the
reference oscillator will be unstable.
9 Observe the following typical response if the CSM is warmed up.
c:17486 off: –11, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175
c:17486 off: –11
, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175
c:17470 off: –11
, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175
c:17486 off: –11
, 3, 6 TK SRC:0 S0: 3 S1:–2013175,–2013175
c:17470 off: –11
, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175
c:17470 off: –11
, 1, 6 TK SRC:0 S0: 1 S1:–2013175,–2013175
10 Verify the following GPS information (underlined text above, from left to right):
– Lower limit offset from tracked source variable is not less than –60 (equates to 3µs limit).
– Upper limit offset from tracked source variable is not more than +60 (equates to 3µs limit).
– TK SRC: 0 is selected, where SRC 0 = GPS.
11 Enter the following commands at the CSM> prompt to exit the debug mode display.
debug dpllp