5071B Cesium Primary Standard and Frequency Standard

Microchip Cesium Atomic Clock 5017B

Product Information

Microchip’s 5071B is the next-generation commercial cesium clock replacement for the existing 5071A, which has been the primary contributor to international time for more than three decades.

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 cesium 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. 5071B was tested over 18 months against an extensive set of qualifications to confirm that this device meets or exceeds all performance specifications.

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.

Key Features

  • 5E−13 accuracy high-performance models
  • 1E−12 accuracy standard-performance models
  • Accuracy levels achieved within 30 minutes of startup
  • 8.5E−13 at 100s high-performance models
  • 2.7E−12 at 100s standard-performance models
  • 1E−14 flicker floor high-performance models
  • 5E−14 flicker floor standard-performance models
  • No deterministic frequency drift
  • 100 kHz, 1, 5 and 10 MHz RF sine wave outputs
  • Three 1 PPS outputs
  • Two 1 PPS inputs to steer to external GNSS receiver or other 1 PPS source
  • AC and DC operating voltages
  • Internal battery back-up for short-term power interruptions