User's Manual

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Table Of Contents

Copyright
Notice
Trademarks
LigoPTP 24 Full Outdoor Units
LigoPTP 24 Feature Summary
- Main Features
- Mechanical Features
- Interfaces/Management
Radio Parameters
Application Examples
- 4E1 + Ethernet with LigoPTP 24 FODU
- Low Power Active Repeater with LigoPTP 24 FODU
- Metro Ethernet and Mesh Networks with LigoPTP 24 FODU
Technical LigoPTP 24 Specification
Cable Requirements
- RS-232 Serial Connection
- 4E1
- 10/100Base-T
- RSSI BNC
Labeling
Resetting the LigoPTP 24 FODU
Web Interface
- 10/100Base-T Port
- Assembling the Ethernet Cable Connector
- Ethernet Management Connection Configuration
- Power over Ethernet Injection
- Termination Panel for 4 E1 and with Power Injector (LigoPTP-TP4)
- Connection with Web Interface
- Interface Description
- Command Execution
- Initial Configuration with Web GUI
Command Prompt Interface
- RS-232 Serial Management Port
- Telnet Connection
- Initial Configuration with Command Prompt
Radial MSE
LDPC
Main Configuration
- Radio Configuration
- ATPC Configuration
- ATPC Algorithm
- Modem Configuration
- Loopback Configuration
System Configuration
- User Configuration
- Names Configuration
- Other Configuration
- Upgrade Software
IP Configuration Window
- Ethernet Management Port IP Configuration
- IP Services
- Static Route Configuration
Ethernet Configuration
- Ethernet Status
- Ethernet Configuration
VLAN Configuration
- Ethernet Switch Port Status and Settings
- Ethernet Switch Block (Functional) Diagram
- Ethernet Switch VLAN Status and Settings
QoS
- QoS Status
- QoS 802.1p Configuration
- DSCP Configuration
- QoS 802.1p Bandwidth Configuration
SNMP Configuration
- SNMP Community Configuration
- SNMP Allowed Hosts Configuration
Alarm Management
- Alarms and Events Structure
- Alarms-Events and Groups Tables
- Alarm Status Window
- Alarm Log
- Alarm and Alarm Threshold Configuration
- Alarm Management Commands
Performance Management
- Performance Management Data Collection
- Performance Values
- Threshold Seconds (TS)
- Tide Mark (TM)
- Performance Management in Web GUI
- Constellation Diagram
- Adaptive Equalizer
  - Equalizer Graph
- Performance Management Commands
Ethernet Statistics
Configuration File
License Management
Command Line
File System
- Firmware and Boot Configuration Files
- Configuration Backup Files
- Working with Files
Security Commands
- Update Software with Update Pack
- Uploading File via Ethernet Management Port (TFTP)
- Uploading File via Ethernet Management Port (FTP)
- Uploading File via Serial Port (Xmodem)
- 18-pin Connector
- Twin BNC Connector
- Sealed RJ-45 Socket
Other Available Accessories
List of Abbreviations

Technical Description & Configuration Guide Performance and Alarm Management

LigoWave Page 69

Constellation Diagram

A constellation diagram is a representation of a signal modulated by the digital modulation schemes

32APSK, 16APSK or QPSK. It displays the signal as a two-dimensional scatter diagram in the complex

plane at symbol sampling instants. Measured constellation diagram can be used to recognize the type

of interference and distortion in a signal.

For the purpose of analyzing the received signal quality, some types of corruption are evident in the

constellation diagram. For example:

1. Gaussian noise is displayed as fuzzy constellation points:

Figure 48 – Gaussian noise (QPSK)

2. Non-coherent single frequency interference is displayed as circular constellation points:

Figure 49 – Non-coherent single frequency interference (QPSK)

3. Phase noise is displayed as rotationally spreading constellation points:

Figure 50 – Phase noise (QPSK)

4. Amplitude compression causes the corner points to move towards the centre: