The Keysight 1144A is an 800 MHz active probe engineered to minimize circuit loading and deliver accurate high-frequency measurements in demanding signal integrity applications. Its 1 MΩ input resistance and 2 pF input capacitance provide minimal probe loading compared to passive alternatives. The probe operates with a 10:1 attenuation ratio and 50 Ω output impedance, accepting maximum input voltages of ±40 V (dc + peak ac) across a ±7.0 V dynamic range. Rise time of ≤440 ps and controlled overshoot characteristics (±10% for the first 6 ns, ±4% from 6 ns to 20 ms, ±1.5% thereafter) ensure signal fidelity in high-speed circuit analysis.
Technical Specifications
Electrical Performance
• Bandwidth: ≥800 MHz
• Rise time: ≤440 ps
• Attenuation: 10:1 ±2%
• Input resistance: 1 MΩ ±5%
• Input capacitance: 2 pF (typical)
• Output impedance: 50 Ω
• Maximum input voltage: ±40 V (dc + peak ac)
• Input dynamic range: 0 to ±7.0 V
• Output voltage offset: <±15 mV
Environmental Characteristics
• Operating temperature range: Performance degrades approximately 0.5%/°C above 35 °C
• Vibration operational: 5 to 500 Hz, 10 minutes per axis, 0.3 grms
• Random vibration: 5 to 500 Hz, 10 minutes per axis, 2.41 grms
– Key Features
• High input impedance (1 MΩ) minimizes circuit loading at high frequencies
• Low input capacitance (2 pF) preserves signal integrity
• Requires external power via Keysight 1142A probe control module or direct oscilloscope probe power output
• Compatible with 50 Ω instrument inputs; external 50 Ω termination option for high impedance inputs
• Comprehensive accessory kit: retractable pincher tip, alligator clip ground lead, BNC adapter, IC tip, ground bayonet, ground lead, dual lead adapter, and mini-pincher tips
– Compatibility & Integration
Operates with 54520A, 54522A, 54540A, and 54542A oscilloscopes via direct probe power. Compatible across 54600, 3000, 5000, 6000 (350 MHz – 1 GHz), 7000, 8000, 80000, 9000, and 90000 Series instruments. The 01144-61604 adapter supports dual-channel active probing from a single supply connector.
