The Agilent HP 1152A is an active oscilloscope probe delivering 2.5 GHz bandwidth for precision signal acquisition in high-frequency circuit debugging. Its 10:1 attenuation factor, 100 kΩ input resistance, and 0.6 pF input capacitance minimize loading on the device under test, preserving signal integrity on densely packed boards where measurement accuracy is critical. The probe accepts ±5 V dc + peak ac signals with a maximum input of ±40 V (dc + peak ac <20 MHz, CAT I) and includes ±20 V variable DC offset capability. Output limiting protects against excessive power dissipation, clamping at ±1.4 V when input plus offset exceeds ±14 V. Rise time measures 2.5 GHz
• Rise Time (10%–90%): <140 ps
• Long-Term Flatness: 1%
• Input Capacitance: ~0.6 pF (typical)
• DC Input Resistance: 100 kΩ ±1%
• Attenuation Factor: 10:1
• Input Operating Range: ±5 V dc + peak ac
• Maximum Input Voltage: ±40 V (dc + peak ac <20 MHz, CAT I); 200 Vac maximum
• Variable DC Offset: ±20 V
• Dynamic Range: ±5 V dc + peak ac
• ESD Tolerance: ±12 kV
• Output Limiting: +1.4 V / –1.4 V (folding to ~–0.8 V)
– Key Features
• Low input capacitance reduces DUT loading across the frequency spectrum
• Output limiting prevents excessive power dissipation during over-voltage conditions
• AutoProbe Interface compatibility for automatic oscilloscope configuration
• Legacy analog resistor-based probe detection (HP AutoProbe)
– Typical Applications
• Digital and RF circuit debugging
• High-speed signal characterization
• Densely packed PCB measurements requiring minimal probe loading
– Compatibility & Integration
The 1152A integrates with AutoProbe Interface-equipped oscilloscopes and utilizes the original HP AutoProbe analog detection method. Modern digital probe ID systems (I2C memory) may require modifications for full compatibility.
