GPS Time Server



All 31 satellites of the Global Positioning System (GPS) have an inbuilt highly accurate atomic clock. Is a GPS receiver synchronized to several GPS satellites, a nanosecond accurate time signal can be calculated from it.

A GPS time server utilizes the GPS receiver as a reference time source and distributes the received absolute time throughout the network. By using a time server with NTP the GPS signal looses its timing accuracy, it is therefore rather reasonable to use an IEEE1588 time server in combination with a GPS receiver, since PTP is able to distribute the highly accurate GPS time signal.

All Meinberg time servers are available with a GPS receiver. Meinberg's innovative up/down converter technology allows the user to install the GPS antenna up to 600 m away from the GPS receiver. Like this critical installations as in production halls or skyscrapers can be performed.

Meinberg Time Server with GPS Receiver:

Advantages of GPS synchronized time servers:

  • worldwide satellite based synchronization
  • high accuracy of up to +/-20ns
  • relatively fail-safe by 31 active GPS satellites

Disadvantages of GPS time servers:

  • Always unobstructed "view" to the sky of the antenna
  • Cable length for L1 GPS antenna with low loss is only about 30 m (Meinberg GPS time servers of up to 700 m)
  • Dependency of an operator (USA)

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