Keysight (Agilent) U4203A flying lead logic analyzer probe

The Keysight (Agilent) U4203A is a 34-channel, single-ended flying lead logic analyzer probe that connects directly to compatible Keysight logic analyzers via a 160-pin interface. Purpose-built for hand-held probing of individual test points, it enables signal acquisition from arbitrarily located nodes within a target system for digital design debugging and verification. The probe maintains signal fidelity through carefully modeled input impedance characteristics and supports differential clock input, making it essential for accurate logic analysis across complex digital circuits.

– Technical Specifications

• Channels: 34 single-ended
• Probe Configuration: Flying lead, direct connect
• Connection Interface: 160-pin direct connect to logic analyzer
• Input Impedance: Frequency-dependent; modeled with 130 Ω resistive signal pin and solder-down ground wire
• Maximum Input Amplitude: 200 mV Vmax-Vmin
• Clock Input: Differential supported
• Loading Characteristics: Equivalent to Keysight 1156A/57A/58A series oscilloscope probes with compatible accessories

– Key Features

• Direct connection eliminates intermediate cabling to the logic analyzer
• Single probe unit covers full 34-channel capacity of compatible analyzers
• Flying lead configuration enables flexible access to test points throughout the target system
• Frequency-dependent input impedance allows circuit-level analysis of probe loading effects
• Accessory interchangeability with 1156A/57A/58A oscilloscope probe family expands measurement versatility

– Typical Applications

• Hand-held probing of individual signal nodes during circuit debug
• Acquisition from test points at arbitrary locations within a system
• Signal integrity verification on multi-channel digital designs
• Sequential or simultaneous capture across up to 34 logic channels

– Compatibility & Integration

The U4203A integrates with Keysight 16850-series portable logic analyzers and U4154A/B AXIe-based logic analysis modules. One probe covers the 16851A (34 channels); two units support the 16852A (68 channels), three support the 16853A (102 channels), and four support the 16854A (136 channels). Accessories designed for Keysight 1156A/57A/58A oscilloscope probes are directly compatible.