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AR77 Ruggedized Time Server

AR77 Ruggedized Time Server Image

AccuBeat’s AR77 is a fully ruggedized mil-spec multi-function GPS Disciplined Time Server which provides accurate time & frequency. The AR77 incorporates numerous features into a single box including a Rubidium Frequency Standard, an internal C/A code 12 channels GPS receiver or (optional) P(Y) code GPS receiver* and can receive an input from an external 1PPS/frequency.

The various options of the unit include a variety of different frequencies and several Time Codes outputs such as IRIG, Have Quick NMEA etc. The Rubidium Standard functions as a local oscillator and is phase-locked to the GPS or to external inputs. All outputs are derived from the Rubidium Clock, which maintains accurate time and frequency when GPS or other inputs are interrupted or lost.

AR77 Data Sheet image

AR77 Data Sheet

The unit includes up to three physical LAN interfaces boards, which support UDP/SNMP for management and for NTP (Network Time Protocol). The three LAN boards can be used for three different networks (with three different IP network addresses), or for two networks where the 3rd LAN board is reserved as a redundant back-up. Precision-Time Protocol (PTP) is also available with one of the LAN boards. The AR77 provides multiple outputs: 10 coax outputs, two fixed (10MHz and 1PPS) and 8 configurable which can be selected from 1PPS, 10MHz, and more.

Additional outputs are available on the D-Type connector including differential RS422 outputs, TOD (Time Of Day) outputs with several standard protocols such as NMEA, IRIG B and Have Quick. The unit is 19” x 1U rack-mountable encasement.


AR77 can be supplied with AccuBeat’s proprietary Anti-Jamming and Anti-Spoofing technology providing additional protection in cases of GPS denial. For further details, please contact us directly.

* The P(Y) receiver must be supplied by the user

AR77-Back Image

Key Features

 Frequency Accuracy : 1E-12
 1PPS Accuracy: 20ns RMS
 Holdover: 1µs/24 hours, 5E-11/month
 20 outputs (10MHz, 1PPS, TOD)
 LAN ( NTP, Monitor & Control)
 Full support for NTP/PTP Networks
 External 1PPS / Frequency input for disciplining
▶ C(A) code GPS receiver
 Front Panel Display (Time, Date, BIT and more)
 Monitor & control: RS232, UDP
 Supply Voltage: 90/260 VAC
 Delay Correction for Input & Output

 P (Y) code GPS receiver
 Up to 3 channels LAN interface
 SNMP Monitor & Control
 IEEE 1588 / PTP Grandmaster
 DDS – Up to 30MHz, 32 bit resolution
 Supply Voltage: DC or DC&AC
 External frequency and TOD distributor
 Graphic User Interface (GUI) Software for PC


 Test Equipment
 Cellular Base Stations
 Scientific Equipment
 Secure Communication
 Mobile Radio Base Stations

Contact us to discuss with one of our experts the best off the shelf or fully customized timing solution for your next project.

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