Agilent/Keysight 4951A

The Agilent/Keysight 4951A is a portable protocol analyzer engineered for field service, installation, and maintenance of data communication systems. It delivers real-time and post-processing data analysis, protocol decoding, network component simulation, and comprehensive troubleshooting capabilities in a compact form factor. The unit supports multiple protocol standards and provides automated line parameter detection, making it essential for diagnosing and resolving network operational issues across diverse communication environments.

– Technical Specifications

• Data Transmission Rates: 50 to 19.2 kbps
• Memory: 32 Kbytes of nonvolatile memory for data, timing, and lead status; additional nonvolatile memory for test setups, monitor programs, and simulate programs
• Optional Mass Storage: Cassette tape (Option 001) provides 512 Kbytes for long-term data and program storage
• Supported Protocols: Async, BSC (Bisynchronous), SDLC (NRZI), HDLC, X.25, SNA, DDCMP, IPARS, character-oriented protocols (ASCII, Baudot, IBM EBCDIC), and user-defined protocols
• Dimensions: 11.2 cm (H) × 25.9 cm (W) × 28.6 cm (D) / 4.4 in. (H) × 10.2 in. (W) × 11.3 in. (D)

– Key Features

• Auto-configuration automatically determines line parameters and initiates data monitoring
• Six software-defined keys (softkeys) provide rapid access to troubleshooting functions
• Bit error rate testing (BERT) assesses line quality and link-level performance
• Asynchronous terminal emulation and 3270 equipment support
• Remote data and program transfer via dedicated RS-232C/V.24 port
• External video viewing through standard RS-170 video port
• PC utility compatibility for remote control and offline data analysis

– Typical Applications

• Field installation and commissioning of data communication networks
• Network maintenance and operational diagnostics
• Protocol troubleshooting and performance verification
• 3270 equipment installation and support
• Link-level performance analysis

– Compatibility & Integration

The 4951A integrates with PC-based utilities for enhanced analysis workflows and supports remote operations through standard serial and video interfaces.