AR51-09

Atomic Clock designed for demanding military applications

AR51-09

Accurate Time & Frequency Ruggedized System

AccuBeat’s AR51-09 unit is a compact military grade GPS-Disciplined Rubidium Clock which offers excellent stability and accuracy. The unit includes a Rubidium Atomic Standard, which is phase locked to an external disciplining source such as GPS or another external inputs. All outputs are derived from the Rubidium Atomic Standard and maintain highly accurate time and frequency even when GPS reception is interrupted.

​

The AR51-09 includes multiple Time of Day (TOD) inputs and outputs. The standard unit includes several Have Quick (ICD-GPS-060) Time Code outputs, in addition to more than 20 1PPS outputs (PTTI ICD-GPS-060, TTL and RS-422 formats) for accurate timing making it an essential unit for secure radio communication applications amongst other possibilities. The standard unit also includes Have Quick (ICD-GPS-060) Time Code input for initial time loading as well as 1PPS input for timing synchronization when a GPS signal is not available.

View Datasheet
Talk to Our Experts

Product Highlights

±5E-11/month
Long Term Stability

30ns RMS
Accuracy 1PPS

≤150 dBc/Hz @10KHz
Phase Noise

Performance

Performance
Time (1PPS)Long- Term AccuracyDisciplined to GPS or to an external
synchronization source		50ns RMS @ 25°C (Typical: 30ns RMS)
Time drift without GPS (Hold-Over)< ±1μs/24hr (typical)
Frequency(10MHz)Frequency AccuracyDisciplined to GPS or to external
1PPS		< ±1E-12 (24 hours average)
Long Term stabilityFrequency drift without GPS (Hold- Over / Aging)±5E-11 / month
Short Term Stability
(ADEV)		≤ 3E-11 @ 1s
Temperature Stability≤ ±3E-10 over -25°C to +65°C (relative to +25°C)
(-40°C to +71°C available as an option)
Phase NoiseOffset frequency [Hz]Phase noise [dBc / Hz]
10Hz≤-114 dBc/Hz
100Hz≤-140 dBc/Hz
1KHz≤-140 dBc/Hz
10KHz≤-150 dBc/Hz
Harmonics≤-53 dBc (up to 90MHz)
Spurious≤-100 dBc @ ± 100KHz from carrier
Warm-up (accuracy vs. time)Rb Lock (< 1E-9 ) < 5 min
±5E-10 within < 7 min
±5E-11 within < 60 min
±1E-11 within < 4hrs
±1E-12 within < 24 hrs
Retrace (without GPS or other
disciplining input)		± 5E-11

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

Download Brochure
Talk to Our Experts

AR51 Key Features

  • GPS disciplined Rubidium clock
  • Frequency Accuracy : 1E-12
  • 1PPS Accuracy: 30ns (RMS)
  • Multiple outputs: 10MHz, 1PPS, TOD (Time of Day)
  • TOD protocols: Have Quick, CL
  • Inputs: GPS antenna, 1PPS, TOD
  • Holdover (no GPS): 1µs/24 hrs (typ.), 5E-11/month
  • Monitor & Control: RS232 / RS422
  • C/A code GPS receiver
  • MIL-STD qualification for airborne applications
  • Compact: 175 mm (d) x 132 mm (w) x 56 mm (h)

AR51 Key Applications

  • Demanding Military Platforms
  • Fighter Aircraft
  • Helicopters
  • UAVs
  • Ships
  • Submarines
  • Mobile Land Platforms
F22HeroV2

Customized configurations are available, contact us to learn more.

Closeup female hand on landline phone in office. Faceless woman in a suit works as a receptionist answering the phone to customer calls

TALK TO AN EXPERT

We invite you to connect with us regarding any inquiries you may have about our services. With over 40 years of experience connecting OEMs and customers worldwide, we are committed to providing you with expert guidance and support. Your questions are important to us. Our seasoned team is dedicated to promptly addressing your concerns and ensuring you receive comprehensive information tailored to your requirements.
Please let us know what's on your mind. Have a question for us? Ask away.
This field is for validation purposes and should be left unchanged.