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6685 CounterFluke
The Fluke PM 6685 Frequency Counter brings calibration lab accuracy to field measurements.
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The Fluke PM 6685 Frequency Counter brings calibration lab accuracy to field measurements.
The PM 6685 is easy to use, compact, and most important of all, it has today's smartest input triggering for frequency measurements. The battery option for the PM 6685 maintains oven stability for 20 hours, giving you instant oven performance even after long transportation.
6685.pdf
Fluke
6685 Counter
6685.pdf
Frequency counters - timer/countersFluke

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Fluke's line of frequency counters and timer/counters meets your needs for measurements of frequency, time intervals and phase plus high-accuracy frequency calibration. A range of five base models plus options for specific application and performance requirements offer cost-effective solutions for your toughest measurement tasks_in the field, on the test bench or in the calibration laboratory .

  • Models PM 6681 & PM 6680B
  • Model PM 6685R
  • Model PM 6685
  • Model PM 6681R DMM
  • Fluke
    Frequency counters - timer/counters
    SC10 - Quartz OscillatorStanford Research Systems - SRS
    SC10 - Quartz Oscillator10 MHz Ovenized Quartz Oscillator: the SC10 is a high stability ovenized 10 MHz quartz oscillator that combines excellent phase noise, Allan variance, and aging characteristics.
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    10 MHz Ovenized Quartz Oscillator: the SC10 is a high stability ovenized 10 MHz quartz oscillator that combines excellent phase noise, Allan variance, and aging characteristics.
    • SC-cut crystal for low phase noise
    • 2 x 10 -12 Allan variance (1 s)
    • Low aging (<2 x 10-10/day)
    • +15 or +24 VDC operation
    • Flexible electronic frequency control
    SC10 - Quartz Oscillator
    SC10 - Quartz Oscillator
    Stanford Research Systems - SRS
    SC10 - Quartz Oscillator
    SC10 - Quartz Oscillator
    SR620 - Frequency CounterStanford Research Systems - SRS
    SR620 - Frequency CounterTime Interval and Frequency Counter: The SR620 Time Interval Counter performs virtually all of the time and frequency measurements required in a laboratory or ATE environment.
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    Time Interval and Frequency Counter: The SR620 Time Interval Counter performs virtually all of the time and frequency measurements required in a laboratory or ATE environment.
    • 25 ps single-shot time resolution
    • 1.3 GHz frequency range
    • 11-digit frequency resolution (1 s)
    • 0.001° phase resolution
    • Statistical analysis & Allan variance
    • Graphical output to XY scopes
    • Hardcopy to printers and plotters
    • GPIB and RS-232 interfaces
    • Optional ovenized timebase
    SR620 - Frequency Counter
    SR620 - Frequency Counter
    Stanford Research Systems - SRS
    SR620 - Frequency Counter
    SR620 - Frequency Counter
    SR625 - Frequency CounterStanford Research Systems - SRS
    SR625 - Frequency CounterFrequency Counter with Rb Timebase: The SR625 Frequency Counter is a NIST traceable frequency counting standard for calibarating base stations, transmitters and many other types of communication syste ...
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    Frequency Counter with Rb Timebase: The SR625 Frequency Counter is a NIST traceable frequency counting standard for calibarating base stations, transmitters and many other types of communication systems.
    • Rubidium atomic timebase
    • 2 GHz prescaler input
    • 11-digit frequency resolution (1 s)
    • 10 minute warm-up period
    • Portable operation
    • 10 MHz Rb timebase output
    • Statistical analysis & Allan variance
    • Hardcopy to printers and plotters
    • GPIB and RS-232 interfaces
    SR625 - Frequency Counter
    SR625 - Frequency Counter
    Stanford Research Systems - SRS
    SR625 - Frequency Counter
    SR625 - Frequency Counter
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