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GMR5000High-Precision, Multi-Function NTP & PTP Master Clock

13-Digit LED Display

GMR5000 Master Clock
  • Mission-critical Stratum 1 timing solution
  • Capability of synchronizing to GPS, GNSS, IRIG-B, or PTP reference
  • High-stability oscillator options available including Rubidium Holdover
  • Internal-disciplined high-stability oscillator options allow for critical holdover resiliency
  • Optional modules provide flexible input/output signal support
  • SNMP v3 with custom MIB
  • Supports enterprise-grade PTP/NTP server application
  • Backward compatible with legacy signals

GMR5000 Base Model

The GMR5000 is a master clock that can reference a variety of timing sources and provide a range of outputs including NTP, PTP, SMPTE, and IRIG-B. The internal modular design allows the unit to be factory-configured per the user's requirements. The base model includes both NTP server and client functionality compatible with IPv4/IPv6 networks and offers AES 256 SSH encryption for secure communications.

Optionally, the device can act as a IEEE1588v2 PTP grandmaster or slave clock, time code generator, NENA time server, frequency generator, and more. Optionally, an OCXO or Rubidium oscillator enhances holdover stability to minimize timing drift.

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GMR500 Front

GMR500 Back

Reference Documents

SpecificationsGMR5000 NTP & PTP Grandmaster Clock


  • Multiple Satellite Synchronization Options
  • • GPS
  • • Galileo
  • • GLONASS
  • • BeiDou
  • Various Augmentation Options
  • Atomic Clock Holdover - Nanoseconds per day
  • Closed-source firmware architecture
  • Configurable to meet DoD security requirements
  • Legally traceable time server for compliance auditing
  • Provides industry standard signals for IRIG, SMPTE, NENA, and other mission-critical groups
  • Made in USA - TAA Compliant

Base Model
  • NTP client with 10/100 Mb Ethernet (Dual-port)
  • NMEA 0183 via RS-232 or RS-422/485
  • NENA Format 0, 1 and 8 via RS-232 or RS-422/485
Additional Options
  • GPS and GNSS receiver options
  • IEEE 1588v2 Precision Time Protocol
  • Time Code Option: SMPTE 24fps (Film), 25fps (EBU), 30fps and 29.97 drop frame
  • Time Code Option: IRIG-B0 (DCLS) and IRIG-B1 (AM)
  • Time Code Option: IRIG-A0 (DCLS) and IRIG-A1 (AM)
  • Time Code Option: IRIG-E0 (DCLS) and IRIG-E1 (AM)
  • Internal high-stability OCX0 oscillator ±.25 seconds/yr
  • Rubidium oscillator ±.25 mS/yr 
  • Synchronizing signals: PPS, PPM, PPH
  • 10 MHZ Input (CMOS or Sinusoidal)
  • Fiber optical LAN (1 or both ports)

Base Model
  • NTP client with 10/100 Mb Ethernet (Dual-port)
  • NMEA 0183 via RS-232 or RS-422/485
  • NENA Format 0, 1 and 8 via RS-232 or RS-422/485
  • 5v at 100mA Pulse Per Second (PPS)
Additional Options
  • IEEE 1588v2 Precision Time Protocol
  • Time Code Option: SMPTE 24fps (Film), 25fps (EBU), 30fps and 29.97 drop frame
  • Time Code Option: IRIG-B0 (DCLS) and IRIG-B1 (AM)
  • Time Code Option: IRIG-A0 (DCLS) and IRIG-A1 (AM)
  • Time Code Option: IRIG-E0 (DCLS) and IRIG-E1 (AM)
  • Time Code Option: HAVEQUICK & NASA36 
  • 5V at 100mA Programmable Pulse Output (PPO)
  • 10 MHZ Output (Sinusoidal)
  • 1MHz & 5MHz output (requires Rb "HSO-3" option)

  • Internal high-stability OCXO oscillator ±0.25 sec/year
  • Rubidium oscillator ±1 ms/year

  • AC input (90-264VAC, 47-63Hz)
  • 18.9w x 1.750h x 5.174d in (48w x 4.445h x 13.14d) cm
  • Temperature: 0 to +60°C (32 to +140°F)
  • Humidity: up to 90%, non-condensing

  • Optical Fiber LAN

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