Agilent/Keysight 1651A

The Agilent/Keysight 1651A is a 32-channel logic analyzer engineered for state and timing analysis of digital circuits and microprocessor-based systems. The instrument delivers flexible configuration options—single state analyzer, single timing analyzer, or concurrent state and timing operation—making it adaptable to diverse debugging workflows. With integrated pattern generation, oscilloscope capability, and comprehensive triggering, the 1651A isolates complex digital faults across 8-, 16-, and 32-bit processors.

– Technical Specifications

Analysis Channels & Memory
• 32 analysis channels with 1k deep memory
• State analysis: 25 MHz maximum clock rate
• Timing analysis: 100 MHz maximum clock rate
• Glitch detection on all channels; minimum detectable glitch width 5 ns at threshold
• Transitional timing on all channels for capture of infrequent events

Triggering & Display
• Complex state triggering: sequence levels, pattern recognizers, range recognizers, storage qualification
• State display modes: Compare, Chart, Waveform

Pattern Generation & Oscilloscope
• Up to 204 channels of pattern generation at 50 Mbit/s
• Up to 8 channels digitizing oscilloscope capability at 400 Msample/s

Microprocessor Support
Compatible with most popular 8-, 16-, and 32-bit microprocessors. Preprocessor interfaces available for standard CPUs; user-definable interface (HP 10320C) for custom architectures.

– Key Features

• Interactive user interface with Auto-Scale for rapid timing analyzer and oscilloscope setup
• Rotary knob control for quick value entry and marker positioning
• Built-in disc drive for setup storage and measurement archival
• RS-232C and HP-IB interfaces for programming and data transfer
• External trigger BNC connector
• Compact 22 lb footprint with built-in handle; optional soft carrying case

– Typical Applications

• Microprocessor and digital system debugging
• State sequence and timing correlation analysis
• Glitch detection and transient event capture
• Real-time pattern generation and stimulus

– Compatibility & Integration

The 1651A integrates into the HP 16500A Logic Analysis System (five card slots with Intermodule Bus for time-correlated multi-card measurements). Companion software converts acquired state data to microprocessor mnemonics. HP 10390A System Performance Analysis software provides State Histogram, State Overview, and Time Interval measurements.