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AR133/AS133
leading multi-functional rubidium Frequency standard

AR133-1.jpg

Accurate Time & Frequency Ruggedized System

The AR133 series are AccuBeat's Standard and high performance atomic clocks, where the accuracy and stability are derived from a quantum transition that occurs in a free rubidium atom. The units utilizes a unique advanced technology, which allows a high-performance component with several options for adjusting the clocks to the different customer requirements. AR133 series are one of the best stable, robustness and accurate atomic clocks in the world. 

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. The algorithm optimizes the performance vs. external disturbances, improves temperature stability, and enables very fine digital frequency control.

Product Highlights

5E-11/month

Long Term Stability

 -150dBc/Hz @10kHz

​Phase Noise

1µs/24 hours

Accuracy-Long Term

Performance (Rubidium Mode)
Frequency
Standard
Option(s)
Frequency
Short Term Stability (ADEV)
< 3E-11 @ 1s
<1.5E-11 @ 1s / <5E-12 @ 1s
< 1E-11 @ 10s
< 5E-12 @ 100s
< 2.5E-12 @ 100s
< 2E-12 @ 1000s (Typ.)
< 1.5E-12 @ 1000s (Typ.)
Phase Noise
<-102 dBc/Hz @ 10Hz <-135 dBc/Hz @ 100Hz <-145 dBc/Hz @ 1kHz <-150 dBc/Hz @ 10kHz
<-116 dBc/Hz @ 10Hz (Typ.) < -142 dBc/Hz @ 100Hz (Typ.) < -154 dBc/Hz @ 1kHz (Typ.) < -158 dBc/Hz @ 10kHz (Typ.)
Harmonics
< -44 dBc (up to 70MHz)
< -50 dBc (up to 70MHz)
Spurious
< -80 dBc in the range 10Hz to 100kHz from carrier
< -110 dBc in the range 10Hz to 100kHz from carrier
Warm-up
< 5E-8 (Lock) within 4 minutes @ 25°C ±5E-10 within 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)
(Free run) <±1E-10 / month (after 3 months of operation)
<±5E-11 / month (at shipment) <±1E-11 / month (at shipment)
Long Term Stability (Disciplined to external 1PPS)
<±2E-12 (24 hrs average)
Temperature Stability and Range
3E-10 over -20°C to +65°C
3E-10 over -40°C to +74°C (Base Plate) 5E-11 over -20°C to +65°C (Base Plate)
Time Accuracy (1PPS)
Long- Term Accuracy
1μs / 24 hours (after disciplining/calibration) typical @ 25ºC
Long- Term Accuracy
1μs / 24 hours (after disciplining/calibration) typical @ 25ºC
Disciplined to external 1PPS - 15ns (7ns typical) RMS @ 25°C
Disciplined to external 1PPS - 40ns (20ns typical) RMS @ 25°C
< -50 dBc (up to 70MHz)
Power Consumption (standard Rubidium mode)
@ Steady-state
< 8.25W @ 25°C
@ Warm-up
< 18W@ 25°C
< 16W @ 15VDC, room temp.

AR133 Key Features

  • 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”)

AR133 Key Applications

  • Secure Communication

  • Telecommunication

  • Software Radio

  • Test Equipment

  • Cellular Base Stations

  • TV Stations, HDTV

  • Scientific Equipment

  • Calibration

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