AS133

Rubidium Frequency Standard with Anti-Spoofing Technology

The AS133 series represents a next-generation, multi-functional Rubidium Frequency Standard integrated with our proprietary anti-spoofing software. This product family includes several sub-versions and is among the smallest atomic standards available today, achieving exceptional accuracy and stability through a quantum transition within a free rubidium atom. Advanced technology enables the AS133’s compact design without compromising performance.

At its core, the AS133 features a Digital Frequency Lock Loop (DFLL), which locks a high-performance crystal oscillator to the rubidium atomic line using an embedded microprocessor and a patented algorithm. This sophisticated algorithm enhances performance under external disturbances, improves temperature stability, and allows precise digital frequency control.

For detailed specifications and a comprehensive list of available custom versions, please refer to the Specifications Sheet. If you require a solution tailored to your unique needs, we encourage you to contact us for further assistance.

special modes of operation

  • Disciplined to an external 1PPS: this improves the long-term-stability, the accuracy, and synchronizes the phase of the 1PPS output to the 1PPS input.
  • Power-saving modes (options): for applications where power is limited, the AS133 offers several power saving modes that can be selected by the user.
  • Mixed Mode (Option) – in this mode the physics package, which is the main power consumer, is turned on and off periodically, allowing lower average power consumption. In this mode the internal
  • OCXO supplies accurate frequency calibrated to the atomic clock frequency. Although performance is slightly reduced, power consumption is significantly lower in this mode.
    OCXO Disciplined Mode (Option) – this mode implements an OCXO disciplining to external 1PPS (with Physics Package shut-down) and consumes even lower power of about 1.8 W.

Key Features

  • Proprietary Anti-Spoofing solution
  • Long-term-stability: 5E-11/month
  • 2E-12 frequency accuracy & 100nSec 1PPS accuracy Relative to 1PPS input when disciplined
  • Short term stability: 5E-12 @ 100s
  • Phase noise: -150dBc/Hz @10kHz
  • Outputs: 10 MHz and 1PPS
  • Supply voltage: 15 VDC / 12 VDC (option)
  • Steady state power < 8.25W
  • Power-saving mode < 1.8W Steady State (option)
  • Size: 77 x 77 x 25.4 mm (3” x 3” x 1”)

Applications

  • GNSS Denied Scenarios
  • Secure Communication
  • Telecommunication
  • Software Radio
  • Test Equipment
  • Cellular Base Stations
  • TV Stations, HDTV
  • Scientific Equipment
  • Calibration

© JJB Ltd. All rights reserved.

© JJB Ltd. All rights reserved.

© JJB Ltd. All rights reserved.