The Keysight N5443A is a performance verification and deskew fixture engineered to calibrate and validate Keysight’s InfiniiMax III probing system. This fixture enables deskewing of cables and probes to optimize measurement accuracy and system reliability in high-speed digital applications. Designed for InfiniiMax III and InfiniiMax III+ probe amplifiers operating above 13 GHz, the N5443A provides essential hardware for validating advanced probing system integrity—a capability Keysight positions as unique among oscilloscope vendors.
Technical Specifications
• Purpose: Performance verification and deskew calibration of InfiniiMax III probing systems
• Frequency Range: Operation above 13 GHz
• Compatible Probe Amplifiers: InfiniiMax III and InfiniiMax III+ (>13 GHz bandwidth)
• Connector Interfaces: 3.5 mm female input connector; probe point fixture interface
• Touchstone File: S-parameter data (.s2p) available for adapter and fixture characterization
– Key Features
• Enables precise cable and probe deskewing for phase-coherent measurements
• Includes removable plastic holder for probe amplifier positioning
• Accommodates external broadband loads via 2.92 mm connectors
• Supports integration with Maury Microwave 8775B2 2.92 mm male broadband loads or equivalent calibration structures
• Compatible with high-quality 2.92 mm to 2.4 mm or 1.85 mm adapter chains for VNA calibration loads
– Typical Applications
• High-speed digital signal integrity verification
• InfiniiMax III/III+ probe system validation and calibration
• Cable propagation delay and phase correction
• Multi-point probe performance characterization above 13 GHz
– Compatibility & Integration
• Primary System: InfiniiMax III and InfiniiMax III+ probe amplifiers
• Optional Accessories: Keysight N5477A Autoprobe II/3.5 mm Adaptor; Keysight 1143A power supply; BNC-to-SMA adapters; banana plug to BNC connectors
• Calibration Support: Compatible with industry-standard Touchstone file formats for adapter characterization and fixture de-embedding
