Introduction; Optical Interfaces For Signals Up To Stm-64/Oc-192; Soh/Toh Loading And Analysis; Drop&Insert Function - Wavetek ANT-20 Operating Manual

ANT-20SE

Introduction

Glass optical fibers are generally used as the transmission medium for SDH, SONET and ATM
networks. Increasing integration has meant that the optical line equipment forms part of the
network elements. The test equipment used for testing these elements must therefore be fitted
with optical interfaces.
1

Optical interfaces for signals up to STM-64/OC-192

The ANT-20SE provides optical interfaces for signals from 52 Mbit/s (STM-0/OC-1) to
9953 Mbit/s (STM-64/OC-192) in a single, compact instrument.
2

SOH/TOH loading and analysis

A wide range of functions for simulation and analysis of informations are provided in the
overhead, e.g. editor and monitor, together with bit error measurements and a V.11 interface for
DCCs and a path trace feature for J0 through J2. This permits precise assessment of the SDH/
SONET-specific characteristics of the network elements.
3 Drop&Insert function
(not for STM-64/OC-192)
When equipped with the Drop & Insert function, the ANT-20SE provides access to all layers
below the transmission rate. This function also includes loop-through operation. The ANT-20SE
can thus be inserted into the optical path instead of using the optical power splitter to extract the
signal.
4

ADM Tester

(not for STM-64/OC-192)
In "ADM Tester" mode, the ANT-20SE generates an optical output signal in addition to the
transmitted PDH signal. This optical signal can be used to test devices that disable their optical
outputs if no optical input signal is present (laser safety disable function).
Introduction
Optical Interfaces
I-1