◊ GPS disciplined Rubidium clock
◊ Frequency Accuracy : 1E-12
◊ 1PPS Accuracy: 30ns (RMS)
◊ Multiple outputs: 10MHz, 1PPS, TOD (Time of Day)
◊ TOD protocols: Have Quick, CLI
◊ 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)

Options:
◊ P(Y) code GPS (SAASM) receiver
◊ TOD : NMEA, NTP / PTP, IRIG B
◊ Monitor & Control: LAN (UDP, SNMP)

The AR51A-09 unit is a compact GPS-Disciplined Rubidium Clock, which offers an excellent stability and accuracy. The unit includes a Rubidium-Atomic-Standard, which is phase-locked to the disciplining source (like GPS or other external inputs).
All outputs are derived from the Rubidium-Atomic-Standard and maintain highly accurate time and frequency even when GPS reception interrupted.

The AR51A-09 includes Time of Day (TOD) inputs and outputs. The standard unit include several Have Quick (ICD-GPS-060) Time Code outputs, followed by several (more than 20) 1PPS outputs (PTTI ICD-GPS-060, TTL and RS-422 formats) for accurate timing which is essential for secure radio communication applications.
The standard unit includes also Have Quick (ICD-GPS-060) Time Code input for initial time loading followed by 1PPS input for the 1PPS timing synchronization, when the GPS signal is not available.
The communication with the unit is the CLI (Command Line Interface) by RS-232 or RS-422. The CLI outputs provides Time, Navigation and status data. The unit can be configured by CLI input channel.

Other Time of Day formats are available as an option like NMEA, IRIG B, NTP or PTP.

The AR51A-09 can be synchronized from 3 independent inputs: internal GPS, external GPS and other external independent accurate timing systems. The input synchronization source is selected manually by user or automatically.

Standard option of the unit is LAN interface, which include NTP (Network Time Protocol), and Monitor & Control by UDP or by SNMP.

The AR51A-09 is designed for demanding military platforms such as fighter aircraft, helicopters, UAV’s, ship borne, submarine and mobile land platforms. The unit is designed for quick installation on a tray or hard mount installation with screws.

The AR51A-09 is designed for demanding military platforms such as fighter aircraft, helicopters, UAV’s, ship borne, submarine and mobile land platforms