Fluke 85RF II High Frequency Probe

Overview

The Fluke 85RF II High Frequency Probe transforms a DC voltmeter into a high-frequency AC voltmeter capable of measuring signals from 100 kHz to 500 MHz. The probe performs AC to DC conversion on a one-to-one basis, with DC output calibrated to equal the rms value of sine wave input. Compatible with standard 0.75 inch dual banana connectors for seamless integration with existing measurement equipment.

Key Features

• Frequency range: 100 kHz to 500 MHz
• AC to DC conversion ratio: 1:1
• Voltage range: 0.25V rms to 30V rms
• Maximum input voltage: 30V rms, 200V DC
• Input capacitance: Approximately 9 pF
• Standard 0.75 inch dual banana connector compatibility

Frequency Response

• 100 kHz to 80 MHz: ±0.5 dB
• 80 MHz to 200 MHz: ±2.0 dB
• 200 MHz to 300 MHz: ±3.5 dB
• 300 MHz to 400 MHz: ±4.5 dB
• 400 MHz to 500 MHz: ±5.5 dB

Applications

• High-frequency AC voltage measurement in RF circuits
• RF signal characterization and analysis
• Extending DC voltmeter capability to RF frequencies