Fluke PM6685R Rubidium Frequency Counter

Overview

The Fluke PM6685R is the most accurate portable frequency counter on the market, combining all the functionality of the standard PM6685 with the stability and accuracy of a built-in Rubidium atomic reference. It is designed for high-accuracy calibration procedures outside the laboratory environment, such as in base station transmitters of large telecommunication networks. The short warm-up time enables immediate use after field transport or relocation.

Key Features

• 300 MHz basic input range; options for 1.3 GHz, 2.7 GHz, or 4.5 GHz
• Ultra High Stability Oven with 5 x 10^-9 stability within 10 minutes
• Rubidium atomic reference with 4 x 10^-10 frequency accuracy within 10 minutes
• High stability time reference with 1 x 10^-9 aging per 10 years
• 10 MHz buffered Rubidium reference output
• 10-digit display with Smart AUTO trigger for error-free measurements
• Analog bar graph for signal strength and input sensitivity indication
• Battery-powered operation for portable field use
• Optional IEEE-488 (SCPI) interface

Applications

• High-accuracy frequency calibration in telecommunication base stations
• Laboratory-level frequency measurements in field environments
• Precision frequency standard for on-site calibration procedures
• RF transmitter and receiver alignment and testing
• Frequency stability verification and characterization