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NEC PASOLINK User Manual

NEC PASOLINK
110 pages
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DIGITAL MICROWAVE RADIO SYSTEM
PASOLINK
Training Course

Table of Contents

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NEC PASOLINK Specifications

General IconGeneral
BrandNEC
ModelPASOLINK
CategoryReceiver
LanguageEnglish

Summary

1. GENERAL

1.2 Equipment Performance (IDU)

Details the performance characteristics of the IDU.

ODU Equipment Performance

Details the performance characteristics of the ODU.

2. SYSTEM CONFIGURATION

3. SYSTEM PERFORMANCE

4. RADIO FREQUENCY ASSIGNMENT

ALARM AND CONTROL

Alarm Indication and Reporting

Details how alarms are indicated and reported by the system.

ODU Description and Operation

ODU General Information

General overview of IDU types and ODU composition.

ODU Equipment Composition

Details the composition of the 1+0 IDU equipment.

FUNCTIONAL OPERATION

Transmit Line Equalization

Covers code conversion, multiplexing, and serial conversion.

Transmit Digital Processing

Covers multiplexing, scrambling, and parity check in digital transmission.

Modulation

Explains differential encoding, 4-phase shift keying, and orderwire modulation.

4-Phase Shift Keying Modulation

Explains the 4-phase shift keying modulation process.

Orderwire Signal Modulation

Describes amplitude modulation of EOW signal with a 450 kHz carrier.

Demodulation

Covers EOW, alarm, main signal demodulation, and differential decoding.

Main Signal Demodulation

Explains coherent detection of 70 MHz IF signals for baseband recovery.

Differential Decoding

Describes the process of differential decoding, reverse of encoding.

Receive Digital Processing

Covers frame synchronization, descrambling, and demultiplexing.

Receive Line Equalization

Covers demultiplexing and unipolar-to-bipolar code conversion.

Analog Service Channel Signal Transmission

Details ASC transmission, including PCM codec and decode circuits.

9.6 K Digital Service Channel Transmission

Explains the transmission of 9.6 K digital service channel (DSC).

Alarm Signal Transmission

Provides two channels for cluster alarm transmission.

Wayside Signal Transmission

Details wayside (WS) signal transmission procedures.

64 K Digital Service Channel Transmission

Covers G.703 codirectional and V.11 transmission for 64K DSC.

LAN Signal Transmission

Details LAN transmission for 10BASE-T or 100BASE-TX.

Alarm and Control Functions

Describes alarm and control functions, including fault detection.

OPERATION

ODU Interface Terminals and Jacks

Details ODU interface terminals and jacks.

ODU Controls, Indicators, and Test Jacks

Describes ODU controls, indicators, and test jacks.

Preparation Work

Pre-Installation Preparation Steps

Covers packing list check, sorting, and delivery of equipment.

Equipment and Materials Lists

Lists necessary equipment, materials, and checklists for site preparation.

Installation Procedures Overview

Provides an overview of installation procedures including mounting, grounding, and connections.

Equipment Start-up and Shut-down

Required Test Equipment for Start-up

Lists necessary test equipment like a digital multimeter for start-up.

Equipment Start-up Procedure

Step-by-step guide for powering up the IDU.

Equipment Shut-down Procedure

Procedure for safely shutting down the IDU equipment.

Equipment Setting and Monitoring

Covers setting and monitoring the IDU/ODU system via PC.

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