The Agilent/Keysight 3776B is a protocol analyzer engineered for testing and troubleshooting PCM-based telecommunications networks. It consolidates voice, PCM, and data measurement capabilities into a single instrument, eliminating the need for multiple dedicated test devices. The 3776B operates across 4 kHz bandwidth analog and digital channels, supporting both Bell and CCITT network standards with selectable line coding options.
Technical Specifications
Supported Protocols & Interfaces
• PCM, Voice, and Data protocols
• VF (Voice Frequency) and 2/1.5 Mb/s digital interfaces
• 4 kHz bandwidth analog and digital channels
• AMI or B8ZS line coding
• Bell standard or Bell extended superframe (ESF) selectable modes
Measurement Capabilities
• Voice, PCM, and data measurements
• Framing and signalling bits setting and monitoring
• Full characterization of 4 kHz bandwidth channels for analog and digital signals
Standards Compliance
• Bell, Japanese, and CCITT network compatibility
• BSTR PUB 43801 (channel bank specifications)
• IEEE STD 743-1984 (Data Option 001)
Configuration Options
• Data Option (001): Extended data measurement capabilities
• Option 002: Modified measurements and I-214 connectors for Japanese networks
– Key Features
Multi-protocol integration reduces field technician load by consolidating voice, PCM, and data analysis. Dual line coding support (AMI/B8ZS) accommodates clear channel applications. Superframe selectivity enables deployment across Bell standard and ESF configurations without hardware modification.
– Typical Applications
Installation, commissioning, and maintenance of telecommunications infrastructure. Suitable for testing PCM channel banks, digital switching systems, and transmultiplexers across North American, Japanese, and CCITT networks.
– Compatibility & Integration
Works directly with North American, Japanese, and CCITT network equipment. Interfaces via VF connections and 2/1.5 Mb/s digital ports. Operating and service manuals available in PDF format; self-support and repair services accessible through Keysight Service Centers.
