Redundant GNSS Reference Frequency Generator

The RG-2111 is a redundant reference frequency generator that uses a Global Navigational Satellite System (GNSS) to steer two internal low phase noise OCXO’s.  Each GNSS Disciplined Module provides a set of 3 low phase noise 10 MHz sine waves, 1PPS, monitor and control interface to a user interface output panel.  If a failure is sensed in one module the unit will switch outputs to the other GNSS Disciplined Module to provide continuous service. These outputs are accurate daily to 1 x 10-12 when slaved to an internal GNSS tracking receiver’s time.  Dual redundant hot swappable power supplies make the RG-2111 perfect for military communications, telecommunications and satcom telecommunications.

The RG-2111 is also able to slave to an external 1PPS signal to steer and hold an internal oscillator and clock system precisely in time.  The oscillator maintains its high accuracy of time and frequency information even if no satellites can be tracked.  Optional dual network ports support NTP time server functionality.  A serial data port is provided to report time, date, position, GNSS satellite health and signal strength.


  • 1U 19” rack mount
  • Dual Redundant hot swappable Power Supplies
  • Dual GPS Disciplined Modules


Number of 1PPS Inputs 2
Number of GPS Inputs 2
Number of Power Supplies 2
Internal Oscillators Supported
High Stability OCXO 5E-9 0-50 deg./1E-10/day ageing
1PPS Output
Connector Type BNC-F
Output Level 0 - 5 VDC
Output Impedance 50 Ohms
10 MHz Output
Connector Type BNC-F
Output Level 0 - 5 VDC
Output Impedance 50 Ohms
GPS Receiver
Satellite Signal GPS L1 1575.42 MHz C/A code
Position Accuracy <5 m, 1-sigma, <10 m, 2 sigma
TTFF, Hot <30 sec.
TTFF, Warm <80 sec.
TTFF, Cold <120 sec.
Sensitivity -173dBw Acquisition, -185dBw Tracking
Number of Power Supplies 2
AC Voltage 90-265 VAC
Power Consumption 25 Watts
Dimensions 19" rack mount, 1U (1.75") high, 8" deep
Weight 11 lbs. nominal
Operating 0 to +50C
Storage -40 to +85C
Humidity Up to 95% RH (non-condensing)
Altitude Operating: 10,000 ft. Non-Operating: 50,000 ft.
EMC Emmission FCC Part 15, EN55022, EN55024