Atomic Clocks

AR133-03

AR133-03

High Stability Under Vibration

The AR133-03 is a ruggedized version of the AR133 Rubidium Frequency Standard, specifically designed for extreme airborne applications. A vibration isolator included in the AR133-03 enables the unit to maintain high frequency stability and accuracy under vibration as may be experienced in severe environments such as airborne platforms. AR133-03 operates successfully at vibration levels of up to 9 g RMS and up to 17 g RMS non-operational

AR133-03 features very fast warm-up and can be disciplined to an external 1PPS source from GPS/GNSS or other sources. It is one of the smallest, high performance disciplined rubidium frequency standards available today. The AR133 family of Rubidium oscillators is comprised of a unique DFLL (Digital Frequency Lock Loop) where a high performance crystal oscillator is locked to the rubidium atomic line using an embedded microprocessor and a special patented algorithm.

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Product Highlights

< 1.2E-11 @ 1s
Short Term Stability

 -159dBc/Hz @10kHz
Phase Noise

±100 ns RMS
Time Accuracy (1PPS)

Performance

Performance
Frequency
Short Term StabilityImproved Version <1.5E-11 @ 1 second (typical < 1.2E-11 @ 1 second)< 2E-11 @ 1sec – under vibration
Standard Version< 3E-11 @ 1 second
Phase NoiseQuiescentQuiescent (Typical)Under Vibration (Typical)(see also the Phase Noise plots below)
<-110 dBc/Hz @ 10Hz<-121 dBc/Hz @ 10Hz<- 121dBc/Hz @ 10Hz
<-135 dBc/Hz @ 100Hz< -146 dBc/Hz @ 100Hz<- 125 dBc/Hz @ 100Hz
<-150 dBc/Hz @ 1kHz< -156 dBc/Hz @ 1kHz<- 145dBc/Hz @ 1kHz
<-155 dBc/Hz @ 10kHz< -159 dBc/Hz @ 10kHz<- 159dBc/Hz @ 10kHz
Harmonics< -50 dBc (up to 70MHz)
Spurious< -105 dBc in the range 10Hz to 100kHz from carrier
Warm- upStandard Version < 5E-8 (Lock) within 4 minutes @ 25°C
±5E-10 within 5 minutes @ 25°C
Improved Version Typical time to lock 2.5 minutes @ 25°C
Retrace< ±5E-11 with On-Off-On cycle: 24 hours, 48 hours, 12 hours
Accuracy @ Shipment< 5E-11
Magnetic Field Sensitivity< 8E-11 / gauss up to 3 gauss DC (worst direction)
Long Term Stability (Free run Rubidium aging)<±5E-10 / year (after 3 month operation) (for improved aging contact factory)
Accuracy under discipliningDisciplined to external 1PPS -
<±1E-11 (averaging from 30-90 minutes after power up)
Temperature Stability and Range±3E-10 relative to 25°C over -20°C to +65°C (up to 70ºC in the improved version)
Time Accuracy (1PPS)±100ns (±50ns typ.) RMS≤±1μs / 24 hrs. in holdover (typical)
(after 4 hours of disciplining before holdover)
Long- Term Accuracyrelative to external 1PPS when disciplined(after 4 hours of disciplining before holdover )
Power Consumption@ Steady-state< 8W @ 25°C
@warm< 16W@ 25°C

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

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AR133-3 Key Features

Short term stability: < 1.2E-11 @ 1s (typical, improved version)
Phase noise: -159dBc/Hz floor (typical)
Outputs: 10MHz and 1PPS
Input: 1PPS for disciplining
Supply voltage: 15 VDC
Steady state power < 8W
Size: 77mm x 77 mm x 49.65 mm
Vibration isolated

AR133-3 Key Applications

Secure Field Communications

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Customized configurations are available, contact us to learn more.

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