The Keysight N5449A High Impedance Probe Adapter bridges the impedance gap between high-impedance probes and 50-ohm Infiniium oscilloscope inputs. This adapter enables direct connection of passive probes, AC/DC current probes, and high-voltage differential probes to modern Keysight oscilloscopes while preserving signal integrity and minimizing circuit loading.
Technical Specifications
• Input Impedance: 1 MΩ (AutoProbe I)
• Output Impedance: 50 Ω (AutoProbe II)
• Frequency Range: Up to 500 MHz
• Attenuation Settings: 10:1 and 1:1 selectable
• Coupling: AC/DC switchable
• Connector Type: SMA to BNC
• Included Probe: N2873A 500 MHz 10:1 passive probe
– Key Features
• High input impedance (1 MΩ) with low input capacitance minimizes loading on test circuits
• Automatic attenuation setting based on oscilloscope volts-per-division scale
• Dedicated buttons for Probe Setup dialog access and AC/DC coupling selection
• Direct compatibility with Keysight’s AutoProbe II interface
• Ships with N2873A 10:1 passive probe for immediate operation
– Typical Applications
The N5449A serves measurements requiring minimal circuit disruption: high-impedance analog circuits, sensitive component testing, AC current monitoring via compatible current probes, and high-voltage signal acquisition using compatible differential probes. The 500 MHz bandwidth accommodates mixed-signal debugging and general-purpose analog troubleshooting.
– Compatibility & Integration
Oscilloscope Series:
• Infiniium V-Series
• 90000 X-Series
• 90000 Q-Series
• Z-Series
Compatible Probes:
• High-impedance passive probes
• Keysight 1147B AC/DC current probe
• Keysight N2893A AC/DC current probe
• Keysight N2790A high-voltage differential probe
• N2873A 500 MHz 10:1 passive probe (included)
