Fluke

85RF High Frequency Probe

Converts a DC voltmeter with a input impedance of 10 MΩ into a high frequency (100 kHz - 500 MHz) RF voltmeter

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85 RF High Frequency Probe 03421

The 85RF High Frequency Probe is designed to convert a DC voltmeter with a input impedance of 10 MΩ into a high frequency (100 kHz - 500 MHz) RF voltmeter. Conversion from AC to DC is accomplished on a one-to-one basis includes a range of 0.25 V - 30 Vrms. The probe’s DC output is calibrated to be equivalent to the RMS value of a sine wave input.

Voltage Range0.25 V - 30 Vrms
Maximum Input Voltage30 Vrms, 200 VDC
AC to DC Ratio1:1
Ratio Accuracy (At 25 MHz and Loaded with 10 MΩ) Above 0.5 V: +/- 0.5 dB
Below 0.5V: +/- 1.0 dB

Add +/- 0.2 dB in RF fields of 1 - 3 V/m
Frequency Response (Relative to 25 MHz)100 kHz - 100 MHz: +/- 0.5 dB
100 MHz - 200 MHz: +/- 2.0 dB
200 MHz - 500 MHz: +/- 3.0 dB

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