AccuBeat’s AR76 is a multifunctional NTP/PTP GPS Disciplined Time Server that combines numerous features in a single package, including a built-in rubidium atomic clock, a 12-channel internal C/A code GPS receiver, and an input for an external 1PPS or frequency source.

The unit’s various options include a variety of different frequencies and multiple time code outputs such as IRIG. Have Quick, NMEA. The Rubidium frequency standard acts as a local oscillator and is phase locked to the GPS or external inputs. All outputs are derived from the Rubidium clock, which maintains accurate time and frequency if the GPS or other inputs are interrupted or lost.

The unit includes up to three physical LAN interface cards that support UDP/SNMP for management and NTP (Network Time Protocol). The three LAN cards can be used for three different networks (with three different IP network addresses) or for two networks, with the third LAN card reserved as a redundant back-up. Precision Time Protocol (PTP) is available (optionally) on one of the LAN cards. The AR76 provides multiple outputs: 10 coaxial outputs, two fixed (10 MHz and 1 pps) and 8 configurable outputs selected from 1 pps, 10 MHz and more.

Additional outputs are available on the D-Type connector including differential RS422 outputs, TOD (Time Of Day) outputs with various standard protocols such as NMEA, IRIG B etc. and others. The device measures 19″ x 1U in a standard rack enclosure.

Technical parameters:

Frequency accuracy: 1E-12
1PPS Accuracy: 20ns RMS
Hold time: 1 µs/24 hours, 5E-11/month
20 outputs (10MHz, 1pps, TOD)
LAN IPV4 (NTP V3, monitoring and control, DHCP)
Full support for NTP/PTP networks
External 1 pps/frequency input for disciplining
12 channel C(A) code GPS receiver
Front panel display (time, date, BIT and more)
Monitoring and control: RS232, UDP
Supply voltage: 90/260 VAC
Delay correction for input & output