Fluke 908/909 Frequency References

The Fluke 908 and 909 Frequency Reference Standards are designed for use as accurate reference clocks in automated test systems and as in-house frequency standards. Because they require only a short warm-up time to reach specified stability, they can also be used as portable frequency standards. Now you can rent Fluke 908 & 909 Frequency References in Bangladesh – precision frequency standards for calibration and testing labs. Ensure accurate, reliable performance with certified rental solutions.

The 909 Frequency Reference includes an ultra-stable Rubidium timebase ("atomic clock"), while the 908 Frequency Reference is built around a high-stability oven-controlled cut crystal oscillator. Both instruments provide five buffered 10 MHz outputs plus one 5 MHz output. Option 70 increases the number of 10 MHz outputs to ten.

Ideal for automated test (ATE) systems

Many production test systems, particularly in the telecommunications industry, require a stable external frequency clock as a reference. Depending on your needs, either the 908 or the 909 can supply a stable frequency reference to up to 11 other instruments and testers, making them ideal for use in an ATE system. In addition, there is a rack mounting kit available.

908 (Crystal oven)

With its high-stability oven-controlled SC-cut crystal oscillator, the 908 offers the lowest purchase cost per output on the market in the 11-output version (option 70 installed).

909 (Rubidium)

The Rubidium version, with its negligible aging drift, needs in practice no adjustment during the lifetime of the test system.

In-house frequency standards

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

Companies that require frequency standards in numerous departments spread over several buildings will find that a local Rubidium standard (909) normally offers a more cost-effective solution than a central reference with a costly distribution system.

Made for portability

The 908 and 909 Frequency References are designed for portability. They perform exceptionally well as transportable fast-warm-up frequency references. Traditionally, oven oscillators using AT-cut crystal could not maintain their specification without continuous battery backup during transportation to different sites. This is because AT-cut crystals suffer from significant frequency retrace (frequency offset after a power interruption). They also need a very long warm-up time, 24 hours or more, to arrive at the final frequency value.

The 908's oven oscillator is designed around the more advanced SC-cut crystal oscillator, which has virtually no retrace. In just 10 minutes, the frequency is within 5x10-9 of the final value, meaning it can be in service faster. Finally, there is no need for battery backup during transportation. The warm-up of the Model Rubidium oscillator is even faster, taking only 10 minutes to reach as close as 4x10-10 from the final frequency.

For protection during transport and storage, there is a carrying case available. The 908 and 909 provide stable, cost-effective solutions for your frequency reference requirements, whether in ATE, laboratory, or portable applications.