Agilent/Keysight 37743A

The Agilent/Keysight 37743A is a communication performance analyzer designed for testing ATM and telecommunication networks operating at DS3 and DS1 signal levels. This DS3 test set integrates multiplexer and demultiplexer capabilities down to DS1, enabling both in-service and out-of-service testing scenarios across network infrastructure. The instrument provides comprehensive circuit analysis and alarming, with front-panel LEDs delivering immediate circuit status indication.

Technical Specifications

• Network Interfaces: DS3, DS1


• Testing Modes: In-service and out-of-service


• Test Formats: M13, C-Bit, and Unframed DS3 generation and analysis


• Alarm Monitoring: Simultaneous in-service DS1 and DS2 alarms and analysis


• Parity Testing: C-bit parity support for modern links

Key Features

• Built-in multiplexer and demultiplexer extending analysis to DS1 level


• Front-panel LEDs for real-time circuit status visibility


• Wide range of test patterns for fault detection and isolation


• Long-term performance measurement and analysis capability


• DS3 generation and comprehensive alarm monitoring


• Compact, lightweight form factor optimized for field deployment

Typical Applications

• Installation and maintenance of DS3 circuits in telephone exchanges


• Installation and maintenance of DS3 circuits at customer premises


• Field troubleshooting and diagnostics on ATM network infrastructure


• In-service circuit performance verification without service interruption

Compatibility & Integration The 37743A operates natively on DS3 and DS1 interfaces, with integrated demultiplexing that eliminates the need for external equipment during multilevel testing. Support for M13, C-Bit, and unframed formats ensures compatibility across legacy and modern network deployments.