AR77 Ruggedized Time Server
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.
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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.
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* The P(Y) receiver must be supplied by the user
Key Features
â–¶ Frequency Accuracy : 1E-12
â–¶ 1PPS Accuracy: 20ns RMS
â–¶ Holdover: 1µs/24 hours, 5E-11/month
â–¶ 20 outputs (10MHz, 1PPS, TOD)
â–¶ LAN ( NTP, Monitor & Control)
â–¶ Full support for NTP/PTP Networks
â–¶ External 1PPS / Frequency input for disciplining
â–¶ C(A) code GPS receiver
â–¶ Front Panel Display (Time, Date, BIT and more)
â–¶ Monitor & control: RS232, UDP
â–¶ Supply Voltage: 90/260 VAC
â–¶ Delay Correction for Input & Output
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Options:
â–¶ P (Y) code GPS receiver
â–¶ Up to 3 channels LAN interface
â–¶ SNMP Monitor & Control
â–¶ IEEE 1588 / PTP Grandmaster
â–¶ DDS – Up to 30MHz, 32 bit resolution
â–¶ Supply Voltage: DC or DC&AC
â–¶ TOD Format: IRIG-B,NMEA,IRIG-A, NASA-36
â–¶ External frequency and TOD distributor
â–¶ Graphic User Interface (GUI) Software for PC
Applications
â–¶ Test Equipment
â–¶ Telecommunication
â–¶ Cellular Base Stations
â–¶ Scientific Equipment
â–¶ Secure Communication
â–¶ Mobile Radio Base Stations
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