The HP/Agilent 3776B PCM Terminal Test Set is a single-unit instrument that consolidates analog and digital test functions for PCM terminal equipment evaluation across telecommunication networks. It delivers voice, PCM, and data measurements for 4 kHz bandwidth channels during installation, commissioning, and maintenance of PCM multiplexers, channel banks, transmultiplexers, and digital switching systems.
Technical Specifications
Network Compatibility
• North American, Japanese, and CCITT networks
• Selectable Bell standard or Bell Extended Superframe (ESF) framing
• AMI or B8ZS (clear channel) line coding
Measurement Capabilities
• Voice, PCM, and data measurements on 4 kHz bandwidth analog and digital channels
• A-A, A-D, and D-A measurements for full and half-channel tests
• Framing and signaling bit setting and monitoring
• DS-1 digital stream generation with user-defined framing and signaling bits
• Option 001 adds advanced data measurements per CCITT ‘0’ Series recommendations and IEEE STD 743-1984, including envelope delay distortion, remodulation, absolute delay, phase jitter, transient and gain hits, phase hits, dropouts, and 3-level impulse noise
Interfaces & Connectivity
• 2/1.5 Mb/s interface (standard)
• VF (Voice Frequency) and PCM interfaces
• HP-IB (IEEE 488) for remote programmability and external controller integration
• Rear panel monitor output
• Connector options: Siemens 3-pin (analog), 120 ohm balanced (digital), 75 ohm unbalanced BNC (digital); Option BTD includes WECO 310 and Bantam jack; Option 604 features Trompeter triaxial type BJ77 on rear panel
• Option 002 provides I-214 connectors and modified measurements for Japanese applications
– Key Features
Programmability
• Fully programmable via HP-IB from external controller
• Downloadable measurement sequences that run independently
• Pre-programmed default measurement parameters
• Non-volatile memory storage for user-modified parameters
– Typical Applications
Installation and commissioning of PCM terminal equipment; maintenance and troubleshooting of digital switching systems, channel banks, and multiplexing equipment.
– Compatibility & Integration
Designed for North American, Japanese, and CCITT network environments with full HP-IB remote control capability.
