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

The 908 and 909 Frequency 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.

The 909 includes an ultra-stable Rubidium timebase ("atomic clock"), while the 908 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.

Fluke

908/909 Frequency reference

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 in many applications, including telecommunications, calibration and automatic test systems.

Both the 910 and 910R deliver a precision frequency and pulse-per-second 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 oscillator (Rb).

Fluke

910/910R Frequency Standard

10 MHz LORAN-C Frequency Standard: Many complex electronic systems require a stable, highly accurate timebase. Communication, automatic test and measurement, and precision time-measurement systems all require accurate frequency standards.

Traditionally, users have looked to atomic clocks (cesium) for high stability and accuracy. With the FS700 LORAN-C Frequency Standard, cesium-clock stability is now available at a fraction of the cost of atomic standards. The FS700 serves as a NIST traceable frequency reference in the US, Europe and Asia.

• 10^-12 long-term stability
• 10^-10 short-term stability (10 ^-11 opt. )
• NIST traceable
• Reception throughout most of the northern hemisphere
• Four 10 MHz outputs
• Phase detector with analog output
• 0.01 Hz to 10 MHz TTL output

Stanford Research Systems - SRS

FS700 Frequency Standard LORAN-C

10 MHz AGC Distribution Amplifier: For installations which require many 10 MHz outputs at a remote location from the source, the FS710 AGC Distribution Amplifier offers seven independent outputs from one input.

Stanford Research Systems - SRS

FS710 - Frequency Standard

The FS725 integrates a rubidium oscillator (SRS model PRS10), a low-noise AC power supply, and distribution amplifiers in a compact, half-width 2U chassis.

It provides stable and reliable performance with an estimated 20 year aging of less than 5 x10^-9, and a demonstrated rubidium oscillator MTBF of over 200,000 hours.

The FS725 is an ideal instrument for calibration and R&D laboratories, or any application requiring a precision frequency standard.

• 10 MHz and 5 MHz outputs
• 1 pps input and output for GPS synchronization
• 20 year aging less than 0.005 ppm
• Ultra-low phase noise
  (<-130 dBc/Hz at 10 Hz)
• Built-in distribution amplifiers (up to 22 outputs)
• RS-232 computer interface
• Two status alarm relays

Stanford Research Systems - SRS

FS725 - Rubidium Frequency Standard