Agilent/Keysight 1661CS

The Agilent/Keysight 1661CS is a portable benchtop logic analyzer combining state and timing analysis with integrated oscilloscope capabilities for digital system verification and debugging. It captures and analyzes complex digital signals across embedded systems, ASICs, and custom digital designs using deep memory, multi-level sequencing, and flexible triggering to isolate events in extended capture windows.

Technical Specifications

• 102 data channels


• 6 clock/data channels


• State analysis: 4K states per channel; 8K states in half-channel mode State Analysis


• Operating speed: 100 MHz Timing Analysis


• Conventional: 250 MHz (all channels), 500 MHz (half channels)


• Transitional: 125 MHz (all channels), 250 MHz (half channels)


• Glitch detection: 125 MHz (half channels)


• Timing resolution: 2 ns Integrated Oscilloscope


• 2 channels at 1 GSa/s sampling rate


• 250 MHz bandwidth (single shot)


• 8000 samples per channel memory


• Automatic pulse parameters and time interval measurements with statistical marker analysis Triggering


• 12-level sequencing (state analysis)


• 10-level sequencing (timing analysis)


• Digital trigger capabilities Storage & Interfaces


• 540 MB internal hard disk drive


• 3.5-inch flexible disk drive


• Ethernet LAN (optional ThinLAN and Ethertwist ports)


• RS-232-C serial


• HP-IB


• Centronics printer interface

Key Features Dual analysis modes enable both synchronous state capture and asynchronous timing measurements in a single instrument. The 2 ns timing resolution supports high-speed signal verification. CRT display with mouse control and optional keyboard provides intuitive navigation across large capture datasets.

Typical Applications Embedded system debugging, ASIC functional verification, digital signal troubleshooting, and timing margin analysis in processor-based designs.

Compatibility & Integration Supports HP B3740A software analyzer for source-level correlation with C++ code and inverse assembly. Processor-specific mnemonics and inverse assemblers available for popular microprocessor families. Over 200 probe solutions support diverse connection topologies. User interface aligns with HP 16500 system architecture.