Wavetek Wandel Goltermann ANT-20

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Summary

Introduction

Multiplex and Demultiplex Functions

The ANT-20 generates and analyzes PDH frames, testing multiplex functions from 140 Mbit/s down to 64 kbit/s.

Testing Switch and Sensor Functions

Explains testing complex switching functions and alarm sensor functions in PDH signals.

In-Service Monitoring of Tributary Channels

Describes how the demultiplex function allows in-service monitoring of individual channels in PDH and SDH signals.

Specifications

Frame Generator (64 k;140 M PDH MUX;DEMUX Chain)

Details available frames for generation, conforming to ITU-T standards, and supported systems.

CRC Checksum (PCM 30 CRC; PCM 31 CRC)

Describes the ANT-20's calculation of CRC checksums as per ITU-T G.704.

Error Insertion (Anomalies)

Lists insertable error types (CRC-4, E bit) and their rates for mainframe instrument.

Alarm Generation (Defects)

Describes alarm types for the mainframe instrument and mutual exclusivity with errors.

Test Signals for Bit Error Rate Measurements

Covers internal and external test signals, including bit patterns and PRBS 6 for measurements.

Receiver Section

Frame Systems for Evaluation

Error Measurements (Anomalies)

Alarm Detection (Defects)

Evaluation of Test Signals for Bit Error Measurements

Drop & Insert, Through Mode, Block & Replace

Functions Overview

Provides Drop & Insert and Through Mode functions for PDH multiplex options on the ANT-20.

AUXILIARY Signal Output [11] (Electrical)

LINE;AUXILIARY Signal Output [13] (Electrical)

AUXILIARY Signal Input [10] (Electrical)

LINE;AUXILIARY Signal Input [12] (Electrical)