AR79/AS79

Accurate Time & Frequency Server

AR79-front-backV2

GNSS-Disciplined Rubidium

The AR79/AS79 is a multi-function GNSS Disciplined Rubidium Atomic Clock, which provides accurate time & frequency. The AR79/AS79 incorporates numerous features into a single box, including a Rubidium Frequency Standard, an internal C/A code 12 channels GPS receiver and external 1PPS input. The Rubidium Standard functions as a local oscillator and is phase-locked to the GPS or to external input. All outputs are derived from the Rubidium Clock, which maintains accurate time and frequency when the GNSSor other inputs are interrupted.

The AR79/AS79 extensively supports the evolving needs for broadband access services delivery, including high throughput, flexible management capabilities, and a high degree of scalability and flexibility to cater for future requirements and technology trends. The AS79 offers advanced Quality of Service (QoS) features including classification and mapping based on layer 1 through layer 4 attributes, rate limiting per service, with highly flexible scheduling, queuingand shaping options.

Product Highlights

1E-10/month
Long Term Stability

20ns RNS
1 PPS Accuracy

113 dBc/Hz
Phase Noise

Performance

Performance
Mode of workStandardImproved (option)
Time (1PPS)1PPS accuracyDiscipline20ns RMSContact Us
Free running1μs / 24 hours (typical)
After 24 hours of disciplining
FrequencyFrequency Accuracy≤ 1E-12 (Disciplined to GPS or to external 1PPS)
Long Term Stability (Free running Rubidium)≤1E-10 / monthContact factory
Short Term Stability (ADEV)3E-11 @ 1s
5E-12 @ 100s
Contact factory
Temperature Stability±3E-10 over -20°C to
+65°C
Contact factory
StandardImprovedUltimate
Phase Noise (@ 10MHz)≤-114dBc/Hz @ 10Hz
≤-140dBc/Hz @ 100Hz
≤-146dBc/Hz @ 1KHz
≤-147dBc/Hz @ 10KHz
≤-113 dBc/Hz @ 10Hz
≤-141 dBc/Hz @ 100Hz
≤-152 dBc/Hz @ 1KHz
≤-156 dBc/Hz @ 10KHz
Integrated phase noise (10Hz to 1MHz):
≤-94dBc
Contact Us
Harmonics≤ -45 dBc
Spurious≤ -90 dBc @±100KHz
Warm-up timeRubidium Lock < 4 minutes 5E-11 within < 60 minutes 1E-11 within < 4 hrs
1E-12 within < 24 hrs

Additional product specifications, outline drawings and block diagrams and test data are available on request.

AS79 Key Features

  • AccuBeat’s proprietary Anti Spoofing solution
  • Frequency Accuracy: 1E-12
  • 1PPS Accuracy: 20ns RMS
  • Holdover: 1μs/24 hours, 1E-10/month
  • 20 outputs (10MHz, 1PPS, TOD)
  • 12 channel C(A) code GPS receiver
  • Dual AC Power supply 90-260 VAC
  • LCD Front Panel Display showing TOD, synch status and more

AS79 Key Applications

  • GNSS Denied Scenarios
  • Power Utilities
  • Communications Networks
  • Financial Services
  • Server Networks
  • Enterprise Networks
  • Satellite Ground Stations
Atomatic Clocks Products 3

Customized configurations are available, contact us to learn more.

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