908/909 Frequency References

Stable frequency references for test systems and calibration labs

The 908 and 909 are ideal for use in calibration laboratories where there is a specific need to calibrate a wide range of instruments, such as frequency counters and synthesizers. Unlike off-air frequency receivers, the 908 and 909 have excellent short-term stability that enables much faster frequency calibration.

If frequency standards are located in several departments, spread over a number of buildings, you will discover the portable 909 Rubidium standard offers a more cost-effective solution than a central reference with a costly distribution system.

• Accurate reference "Atomic clock" in automated test systems
• Affordable and very cost effective
• Designed for portability with optional carrying case
• No need for battery backup during transportation
• Fast warm-up time

910/910R GPS Controlled Frequency Standards

The cesium controlled frequency standard that uses GPS technology and connectivity to provide primary standard traceability from any location

The 910 and 910R GPS-controlled frequency standards are fully traceable and extremely accurate frequency standards and are ideally suited for use as frequency standards in many applications, including telecommunications, calibration and automatic test systems.

Both the 910 and 910R deliver a precision frequency and time reference which, with its many connectivity options, can be installed, monitored and managed from virtually any location. Both models receive their long-term frequency stability from the built-in cesium standards in the GPS-satellite array, yet can also provide a very high short-term stability from the built-in oven controlled crystal oscillator (OCXO) or rubidium standard (Rb).

PM 6681R Rubidium Counter/Calibrator

The highest performance timer/counter/analyzer available

The PM 6681R sets the new standard for measurement and analysis of time intervals, frequency, phase and jitter. For development, calibration, or challenging production test applications, the PM 6681R is the leader.

PM 6685 Universal Frequency Counter

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.

PM 6685R Rubidium Counter/Calibrator

Today's most accurate frequency counter

With a built-in Rubidium atomic resonance-controlled frequency reference, the PM 6685R is the most accurate frequency counter on the market and it has the additional benefit of full portability.

High stability, high accuracy and short warm-up time make this instrument ideal for high-accuracy calibration procedures outside the calibration laboratory environment, such as in base station transmitters of large telecommunications networks like GSM.

The short warm-up time makes that the PM 6685R is ready for use quickly, for example after transport or change of location inside a building.

PM 6690 Counter/Timer/Analyzer

The Fluke PM 6690 timer-counter-analyzer is the most versatile and accurate tool for measuring time, frequency, or phase. On top of that, the PM 6690 has built-in analysis capabilities that give you the dynamics and the statistical behavior of the parameter under test. The PM 6690 offers an intuitive user interface and graphical display which makes it easier to use than any other timer-counter. And all this at a very attractive price!

• High resolution and speed
• 12 digits/sec. frequency measurements
• 100 ps single shot time-resolution
• 0.001° phase resolution
• Frequency range: 300 MHz standard; 3 GHz or 8 GHz input optional
• Built-in statistical analysis
• Graphical display gives upto 14 digits resolution
• Statistical analysis built-in, giving TrendPlot and Histogram display
• USB and GPIB as standard