Keysight Agilent 4951B

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The HP 4951B portable datacommunications protocol analyzer is used for monitoring and decoding data transmissions, simulating network components, performing bit error tests and remotely transferring data and programs through a separate RS-232C/V.24 port. External viewing is supported via a standard RS-170 video port.

The 4951B is compatible with the HP 4953A and 4955A.

• Protocols: X.25, SNA, X.21, DDCMP, HDLC, SDLC (NRZI), BSC, IPARS, and character asynchronous or synchronous protocols
• Data transfer rates (bps): 50 to 19200, teletext 1200/75, EXTERNAL up to 19200 full duplex for all monitoring, simulation, triggering, and BERT tests. Exceptions: Asynchronous at 1200 bps, synchronous NRZI at 12000, 14400, and 16000 bps; BERT at Teletext 1200/75, 16000, 14400, and 150 bps. Can capture a complete buffer full of data at line speeds up to 64 kbs (bit-oriented protocols only, no triggering)
• Data codes: ASCII, EBCDIC, Baudot, Six Bit Transcode, IPARS, and EBCD
• Capture memory: 32 KB Ram stores data characters, timing, and lead status information
• Optional tape drive: 512 KB - store data, timing information, menu configurations
• Lead status: The status of five control leads are stored for each interface—RTS, CTS, DTR, DSR, and CD for RS-232C/V.24 and CS, RS, RR, TR, and DM for the RS-449 interface
• Character framing: 5, 6, 7, or 8 information bits, plus parity. For asynchronous systems, select 1, 1.5, or 2 stop bits per character
• Error checking: CRC-CCITT, CRC-16, CRC-12, CRC-6, LRC, and parity
• Triggers: 63, consisting of characters, errors, interface lead transitions or timer values. Can be simultaneously active up to 19200 bits per second
• Timers: Five, each with a maximum count of 65565 ms, resolution 1 ms
• Keyboard: Full ASCII keyboard with six softkeys and cursor control
• Display: 12.7 cm (5 inches) diagonal with 16 lines and 32 characters per line
• Display formats: DTE data over DCE data, Data and Lead State, DTE data only, DCE data only, and Frame and Packet decode
• Send strings: 255 characters per string maximum; 1750 characters total
• Remote capability: Separate rear panel RS-232C/V.24 port or use the interface pod
• Bit Error Rate Testing: Simultaneously measure bit errors, block errors, errored seconds, and percent error free seconds
  • Block size: 63, 511, 1000, or 2047 bits
  • Patterns: 63, 511, 2047 bit pseudo random sequence
  • Character framing: Select 5, 6, 7, or 8 bits per character and parity
  • Inject error function: Inject single errors or bursts of errors
• Accessory options
  • 001: Integral tape drive
  • 003: Katakana JIS-7, and EBCDIK data code
  • 100: HP 18173A RS-232C/V.24 inteface pod
  • 101: HP 18174A RS-449/422A/423A interface pod
  • 102: HP 18180A Combination RS-232C/V.24 and RS-449/422A/423A interface pod
  • 103: HP 18179A RS-232C/V.24 interface with breakout box
  • 104: HP 18178A X.21 interface kit
  • 106: HP 18197A combination X.21/RS-232C/V.24 pod