Digital Protocol Analyzers Catalog

The Keysight Digital Protocol Analyzers Catalog provides a comprehensive overview of instruments designed for capturing, decoding, and analyzing high‑speed digital interfaces used in embedded systems, memory architectures, and modern serial interconnects. Organized into three capability classes—portable logic analyzers, DDR logic analyzers, and PCIe protocol analyzers—the catalog covers solutions that support a wide range of performance needs, from compact field debugging to high‑channel‑count memory validation and advanced PCIe/CXL protocol analysis. These analyzers support workflows across embedded designs, DDR/LPDDR memory systems, PCI Express‑based topologies, data center technologies, accelerators, networking equipment, and next‑generation serial interfaces.
 

Portable logic analyzers provide compact tools for digital signal capture and multi‑signal correlation, enabling engineers to debug embedded systems and verify timing interactions across buses and subsystems. DDR logic analyzers extend performance for memory system validation with deeper memory depth, higher data rates, and multi‑channel scalability. PCIe protocol analyzers, exercisers, and backplanes support the full PCIe and CXL ecosystem with high‑speed link capture, real‑time protocol decoding, link training control, error injection, and compliance‑ready visibility for system‑level interoperability and performance analysis.
 

Software and hardware accessories enhance measurement fidelity and visibility across all classes. Keysight provides protocol analysis software, exerciser control tools, compliance suites, and traffic decoding platforms for PCIe and CXL, along with high‑speed probes, interposers, connectors, and flying leads to ensure accurate capture across fast digital edges. Keysight Support Services, including KeysightCare, provide prioritized assistance, calibration support, and expert troubleshooting to help engineers maintain high uptime and reliable measurement performance. High‑performance systems include one year of KeysightCare Assured, ensuring consistent support throughout development and integration cycles.
 

Explore the digital protocol analyzer classes:

• Portable logic analyzers come in the LA1-class, which includes the 16860 Series, and supports 34 to 136 channels with up to 128 Mpts of memory depth. They provide high‑performance digital signal analysis with differential and single‑ended signal support, conventional timing up to 5 GHz, and 12.5 GHz timing zoom for capturing fast edges and glitches. LA1 analyzers integrate oscilloscope waveform views for correlated timing analysis, making them ideal for debugging DDR and LPDDR memory systems, embedded subsystems, and multi‑bus digital designs.
  
  
• DDR logic analyzers come in the LA4-class, which includes the U4164A, and offers 136 channels with up to 400 Mpts of memory depth. They support DDR5, LPDDR5, DDR4, DDR3, LPDDR4, and earlier memory standards, with high‑speed state mode operation up to 4 Gb/s and 10 GHz timing mode for ultra‑high‑resolution timing analysis. LA4 analyzers scale to 680 channels in a single chassis and are designed for deep memory trace capture, precise timing correlation, and high‑speed memory protocol validation in complex digital systems.
  
  
• PCIe protocol analyzers, exercisers, and backplanes come in the LA5-class, which includes the P5552A, P5570A, P5551A, P5573A, and P5563B. They support PCIe 1.0 through PCIe 6.0 and CXL 1.1 and 2.0. These instruments capture, decode, and analyze traffic at 32 GT/s to 64 GT/s across NRZ and PAM4 signaling. PCIe protocol analyzers provide deep trace memory up to 16 GB with real‑time compression, built in equalization for high‑speed link recovery, and detailed timing and protocol visibility. PCIe exercisers generate and simulate real‑world traffic patterns, error conditions, and link training scenarios to validate device behavior under controlled workloads. PCIe backplanes provide a stable, standards‑compliant interface optimized for high‑speed data integrity and compatibility with EDSFF and OCP‑NIC form factors.
   

Digital protocol analyzer architectures support a wide range of workflows.
Portable logic analyzers provide compact, high‑bandwidth tools for embedded debugging and multi‑signal correlation. DDR logic analyzers offer deep memory, high‑speed capture modes, and scaling options for large multi‑bus systems. PCIe analyzers and exercisers provide the advanced traffic generation, protocol decoding, link training control, and error injection needed for modern high‑speed serial interfaces and CXL‑based architectures.
 

Software and accessories extend protocol analysis capability across all classes.
Keysight software supports protocol exerciser control, compliance test suites, and detailed traffic analysis for PCIe and CXL interfaces. Accessories include probes, interposers, cables, connectors, and flying leads to ensure accurate high‑speed digital capture. Software tools provide enhanced visibility into protocol behavior, error events, link training sequences, and transaction layer activity, enabling reliable debug and compliance workflows.
 

Keysight Support Services ensure accuracy, uptime, and expertise.
KeysightCare support plans provide prioritized response, calibration services, and expert assistance to help engineers maintain reliable operation and reduce system downtime. High‑performance protocol analyzers include one year of KeysightCare Assured, ensuring consistent measurement performance and fast technical support throughout development and integration cycles.