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Master Clocks

The GMR1000, GMR5000 and GMR6000 are high-precision, multi-function master clocks that can act as an NTP server, PTP grandmaster, time code generator or frequency reference.

GMR6000 Master Clock
  • When equipped with a GPS or GNSS receiver the GMR provides an accuracy ±15 ns to UTC.
  • Base models include both NTP and SNTP client and server functionality compatible with IPv4/IPv6 networks and offer AES256 SSH encryption and MD5 authentication for secure communications.
  • Properly configured and using standard NTP polling rates, our time servers can support and synchronize thousands of simultaneous NTP clients.
  • The GMR can also read NMEA 0183 and NENA messages to set system time, or time can be set manually and the device can generate NMEA, NENA or Truetime/Kinemetrics.
  • Optional outputs include time code reader and generator (SMPTE, IRIG-B, IRIG-A, IRIG-E), PPO (programmable pulse output), 1PPS (pulse per second), 10 MHz sine wave input and output, and PTP (IEEE1588 Precision Time Protocol).
  • Holdover accuracy and stability is maintained with a high-stability TCXO oscillator that can be upgraded to an OCXO or Rubidium oscillator to minimize timing drift.

GMR1000, GMR5000 & GMR6000

GMR1000

The GMR1000 is a compact time server that can sync to a variety of timing references and provide a range of outputs including NTP, IEEE1588v2 PTP, IRIG-B, SMPTE, 10Mhz, 1PPS and more.

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GMR5000

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.

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GMR6000

The GMR6000 is a versatile master clock and time server designed for mission-critical operations, capable of functioning as a PTP grandmaster, time code generator, or frequency reference. Its robust design features multiple timing inputs, multiple customizable outputs, internal oscillator, built-in power redundancy, and intelligent switching to ensure accurate, legally traceable time and frequency signals across an entire network.

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Tradeshow Notice

Masterclock will be exhibiting at the NAB Show, April 19-22, 2026.
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