The AR51-09 from AccuBeat is a military-grade, GPS Disciplined Rubidium Time and Frequency Clock that operates in the L1 and L2 bands. It can be disciplined to a GPS or an external synchronization source with a time accuracy of 1 PPS and a frequency accuracy of ±1 x 10-12. This system has spurious levels of less than -100 dBc, harmonics of -53 dBc, and phase noise of -140 dBc/Hz (at 1 kHz offset). It offers excellent stability and accuracy and includes a Rubidium-atomic standard, which is phase-locked to the disciplining source. This system ensures that all the outputs are derived from the Rubidium-Atomic standard while ensuring highly accurate time and frequency even when the GPS reception is interrupted. It requires a DC supply of 28 V and consumes less than 20 W of power (steady-state).
The AR51-09 includes a Quick Time Code input for initial time loading followed by 1 PPS input for the 1 PPS timing synchronization when the GPS signal is not available. It uses a command line interface (CLI) to provide geo-location data via the CLI output ports. This time and frequency system can be synchronized to 3 independent inputs and the input synchronization source can be selected manually or automatically. It supports LAN interface (NTP), UDP, and SNMP protocols and C/A signaling code for communication. This GPS system is available in a screw-mount enclosure that measures 175 x 132 x 56 mm and is ideal for fighter aircraft, helicopters, UAVs, shipborne, submarine, and mobile land applications.
