5071B Cesium Atomic Clock

Product Information

Microchip’s 5071B cesium Atomic Clock primary time and frequency standard matches the form, fit and functions of its predecessor the 5071A. All connections and commands remain unchanged. The 5071B’s internal electronics have been updated with modern circuitry, including Microchip’s microprocessors (MPUs), to ensure continuity of supply for all components into the next decade and achieve RoHS compliance. The 5071B Cesium Atomic Clock was tested over 18 months against an extensive set of qualifications to confirm that this device meets or exceeds all performance specifications.

Providing 100 nanosecond holdover for more than two months and maintaining system synchronisation when GNSS signals like GPS are denied, the product would enable a 5G network to remain fully operational for months without GNSS.

The 5071B offers exceptional stability and is the first cesium standard to specify its stability for averaging times longer than one day. The instrument takes into account environmental conditions that can heavily influence a cesium standard’s long-term stability. Digital electronics continuously monitor and optimise the instrument’s operating parameters.

Thus, the 5071B’s response to environmental conditions such as temperature and humidity are virtually eliminated. The 5071B primary frequency standard maintains its accuracy and stability, even in unstable environments.

Available in a three-unit height (3U) 19-inch rackmount enclosure, the 5071B provides a compact product to work in environments where it can be easily transported and secured, versus a larger alternative designed specifically for laboratory environments.

5071B Cesium Atomic Clock Benefits

• Maintains exceptional accuracy and stability even in unstable environments — unsurpassed stability in the lab or field
• Accuracy ±5.0 × 10–13 for high performance
• Stability ≤5.0 × 10–12 for high performance (for 1 second averaging time)
• Environmental stability ±8.0 × 10–14 for high performance (frequency change for any combination of environmental conditions)
• Long-term stability ≤1.0 × 10–14 for high performance (for 5-day averaging time)
• Proven reliability with an average mean time between failures (MTBF) of greater than 160,000 hours
• Full traceability to NIST
• AC and DC input and internal battery back-up