Masterclock PTP NTP Master Clocks
GMR1000
GMR1000 - Multi-Functional Master Clocks
The GMR1000 is the compact NTP grandmaster for applications that do not require broadcast or PTP outputs. A single unit serves an entire office or production network with Stratum 1 time, fed by its own GNSS receiver. More compact and more affordable than the GMR5000, ideal for SMB networks, hospital campuses or dispatch centres that need NTP only. With the proven Masterclock GMR platform quality and the same 5-year warranty as the larger models.
Standard Inputs
- NTP client via RJ45 10/100 Mb Ethernet
- NMEA 0183 via RS232/422 or USB
- NENA format 0,1,8 via RS232/422 or USB
- [Internal high-stability TCXO oscillator ± 3 sec./year](../../../high_stability_oscillators.html)
- Configuration via USB or Ethernet
Standard Outputs
- NTP server with 10/100 Mb Ethernet
- NMEA 0183 via RS232/422 or USB
- NENA format 0,1,8 via RS232/422 or USB
Input Options
- GPS or GPS/GLONASS receiver: Basic , Standard , High Gain
- [Time codes](../../../time_code_generator.html): IRIG-B0 (DCLS), IRIG-B1 (AM), IRIG-A0 (DCLS), IRIG-A1 (AM), IRIG-E0 (DCLS), IRIG-E1 (AM), SMPTE 12M, 309M, 24/25/30 fps
- [Internal high-stability OCXO oscillator ± 0.25 sec/year](../../../high_stability_oscillators.html)
- VITC input
- Synchronizing signals: PPS, PPM, PPH
- IEEE 1588 Precision Time Protocol
Output Options
- [Time codes](../../../time_code_generator.html): IRIG-B0 (DCLS), IRIG-B1 (AM), IRIG-A0 (DCLS), IRIG-A1 (AM), IRIG-E0 (DCLS), IRIG-E1 (AM), SMPTE 12M, 309M, 24/25/30 fps and 29.97 drop frame
- 5V at 20mA Pulse Per Second (PPS)
- Optical Fiber LAN
- Programmable Pulse Output (PPO)
- 10MHz sine wave
- IEEE 1588 Precision Time Protocol
Power, Physical Dimensions, Operating Parameters
- DC input (9-28 VDC)
- Includes external 12 VDC wall mount power supply with locking DC plug
- Size: 16.35 x 10.32 x 3.65 cm, Weight: 453.6 g
- Temperature: 0 to 60°C
- Humidity: Up to 90% (non-condensing)
Other Features
- Internal TXCO maintains time during loss of external sync within ± 3 seconds/year
- WinDiscovery configuration software included
- Fully configurable offsets for time zone and DST
- Programmable relay closure - one event per day with NO or NC dry contact relay
- Relay alerts loss of sync by default
- Telnet or SSH communication
- SNMP with custom MIB
- IPv4/IPv6 compatible
Other Options
- DB9 breakout adapter
- Six-digit display
- DIN rail mount available
Compliance
- FCC, CE Marked, ROHS, ANSI
Warranty
- 5-year limited parts and labor warranty
Frequently asked questions
When should I choose the GMR1000 instead of the NTP100-GNSS?
The NTP100-GNSS is a 1U desktop unit for smaller installations. The GMR1000 is the full-rack 19" grandmaster, with greater internal stability, higher capacity and the GMR platform that is upgradeable with TCG or TCR modules. For enterprise installations with several hundred NTP clients and critical holdover requirements, the GMR1000 is the right choice.
What is the NTP accuracy of the GMR1000?
The GMR1000 delivers Stratum 1 time from GNSS with an NTP output that respects the typical ±millisecond margin of NTP over-LAN. Practical jitter and offset at clients depend heavily on your network topology. For the exact specification, consult the datasheet or request advice.
How many NTP clients can a single GMR1000 serve?
Hundreds to thousands of NTP clients per second are typically achievable, depending on polling interval and network topology. For large campuses a GMR1000 can act as the primary source with distribution via intermediate NTP servers. Request a design review from Daylight bv for your exact scale.
What is the lead time for this product?
Standard lead time is 8-10 weeks from Masterclock USA. Daylight bv stocks the most common references in Ghent. Contact us for current availability and any rush options.
What warranty do you get on this product?
5-year limited parts and labour warranty via Daylight bv as authorised Masterclock distributor. Carry-in for customers in the EEA, on-site available by prior arrangement. See [five-year warranty](/en/knowledge-base/five-year-warranty/).
Comparison
Compare the GMR1000 with other models in the same product family.
View comparison · GMR1000 vs GMR5000 vs GMR6000Background in our knowledge base
Deeper explanation of the protocols and concepts behind this product.
Interested?
Request a no-obligation quote for the GMR1000. Daylight bv – authorised Masterclock distributor since 2014, with a 5-year limited warranty and 24/7 support.
Request a quote