The Keysight 1131B InfiniiMax Probe is a high-performance active differential probe delivering 3.5 GHz bandwidth for precision high-speed measurements on modern digital and analog circuits. Built around patented resistor probe tip technology, it minimizes loading on the device under test through exceptionally low input capacitance and maintains superior signal fidelity across its operating range. The probe integrates Keysight’s AutoProbe interface, enabling automatic oscilloscope configuration including power and attenuation settings on compatible instruments.
Technical Specifications
• Bandwidth: 3.5 GHz
• Attenuation Ratio: 10:1
• Dynamic Range: ±2.5 V
• Maximum Input Voltage: ±30 V peak
• DC Offset Range: ±12 V (with probe offset)
• Differential Input Resistance: 50 kΩ
• Differential Input Capacitance: 0.27–0.34 pF
• Single-Ended Input Resistance: 25 kΩ
• Single-Ended Input Capacitance: 0.44–0.67 pF
• Probe Length: 1.5 m
• Weight: 0.46 kg
• System Bandwidth (with 1 GHz oscilloscope): 1 GHz
– Key Features
• Ultra-low input capacitance for minimal DUT loading
• Flat frequency response across the 3.5 GHz bandwidth
• Patented resistor probe tip design
• AutoProbe interface for automated instrument configuration
• RoHS compliant; form, fit, and function equivalent to the 1131A
• Wide ±12 V DC offset capability for AC signal measurements on biased nodes
– Typical Applications
High-speed digital and analog circuit characterization, signal integrity analysis, and embedded system debugging on modern processors, memory interfaces, and communication standards.
– Compatibility & Integration
Designed for InfiniiMax I and II Series amplifiers. Fully compatible with Infiniium 2.5 to 3 GHz oscilloscopes and the Infiniium 86100A Digital Communication Analyzer (via N1022A adaptor). Requires one or more probe heads or connectivity kits, including differential and single-ended probe connection sets, special browser attachments, and solderable or socketed probe tip sets.
