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Time interval and frequency standard products developed by Pendulum Instrument is based with model 6688 and model 6689. But also, time GPS-controlled interval and frequency standard. Those products are based on a Rubidium reference (GPS-89) or an oven-controlled crystal oscillator.
- 6688 & 6689 : Achieve a stable frequency reference in calibration labs or test systems with the stand-alone high stability oven-controlled crystal oscillator found in the 6688 Frequency Standard. For greater stability employ the Rubidium Frequency Standard 6689, ensuring frequency drift due to aging of less than 0.001ppm per 10 year period.
- GPS-12R : A portable reference standard for ultra-stable GPS-controlled Rubidium reference with near-Cesium accuracy; the GPS-12R is the recognized measurement device for telecom and wireless communication field applications where battery operation with zero warm up after transportation, and hold-over drift rate of less than 1microsecond after 24 hours for uninterrupted operation is required. As a NIST traceable frequency standard, the GPS-12R is ideally suited as the in-house frequency standard for all test equipment.
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Symmetricom's 5071A primary frequency standard delivers unsurpassed accuracy, stability and reliability for the most demanding laboratory and field applications.
Metrology and Calibration Labs
The 5071 offers exceptional frequency stability which is a key specification that directly affects a laboratory's ability to deliver timekeeping and calibration services to its clients. With a stability specification for 30-day averaging time, the 5071A can keep extremely predictable time and phase for long periods. Further, the 5071A can be used for long-term averaging of noisy signals such as GPS.
Performance suited to advanced communications and tracking systems
Stable frequency generation and frequency flexibility are required to transmit and receive signals properly between ground terminals and communication satellites. The 5071A's state-of-the art technology produces offset and primary frequencies with the same guaranteed stability.
Frequency accuracy to 5 x 10-13
The intrinsic accuracy of the cesium beam tube assures that any 5071A Option 001 will power up to within 5 x 10-13 of the accepted standard for frequency. This is achieved under full environmental conditions in 30 minutes or less- and without the need for any adjustments or alignments.
Long-term stability better than 1 x 10-14
The 5071A Option 001 high-performance cesium beam tube guarantees stability to be better than 1 part in 10-14 for averaging times of five days or greater. The 5071A is the first cesium standard to specify stability for averaging times longer than 100,000 seconds (approximately one day).
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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 × 10-9, 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.
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