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
3-54
Table 3-20: LORAN–C Initialization/Verification
Step NoteAction
2 Verify the following LFR information (highlighted above in boldface type):
– Locate the “dot” that indicates the current phase locked station assignment (assigned by MM).
– Verify that the station call letters are as specified in site documentation as well as M X Y Z
assignment.
– Verify the S/N ratio of the phase locked station is greater than 8.
3 At the CSM> prompt, enter sources <cr> to display the current status of the the LORAN receiver.
– Observe the following typical response.
Num Source Name Type TO Good Status Last Phase Target Phase Valid
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
0 Local GPS Primary 4 Yes Good –3 0 Yes
1 LFR ch A Secondary 4 Yes
Good –2013177 –2013177 Yes
2 Not used
Current reference source number: 1
*NOTE “Timed–out” should only be displayed while the LFR is warming up. “Not–Present” or
“Faulty” should not be displayed. If the LFR does not appear as one of the sources, then configure the
LFR as a back–up source by entering the following command at the CSM> prompt:
ss 1 2
4
LORAN LFR information (highlighted above in boldface type) is usually the #1 reference source
(verified from left to right).
* IMPORTANT
If any of the above mentioned areas fail, verify:
– The LFR antenna is not obstructed or misaligned.
– The antenna pre–amplifier power and calibration twisted pair connections are intact and < 91.4 m
(300 ft) in length.
– A dependable connection to suitable Earth Ground is in place.
– The search list and PLL station for cellsite location are correctly configured .
NOTE
LFR functionality should be verified using the “source” command (as shown in Step 3). Use the
underlined
responses on the LFR row to validate correct LFR operation.
5 Close the HyperTerminal window.