Radio Time Systems

A reliable IT network starts with the exact time

With GUDE radio time solutions, your IT devices have the atomically accurate time

GUDE’s radio clock systems enable synchronization of individual clients as well as complete networks via DCF77. The time servers of the EMC Professional series provide the entire network with the current radio time of the DCF77 transmitter via their integrated NTP server.

DCF77 time server

Synchronize your mission-critical equipment with accurate atomic time. Increase your operational reliability with our reliable radio clock systems: DCF77 time servers with integrated radio clock for industrial environments and infrastructures with high-precision requirements.

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Protocols for time synchronization

NTP – The Network Time Protocol (NTP) is the most commonly used standard protocol for time synchronization in networks. It was developed by David L. Mills at the University of Delaware and published in 1985.

SNTP – The Simple Network Time Protocol (SNTP) is a simplified version of the Network Time Protocol (NTP). It has the same structure as NTP and differs only in the algorithms used for time synchronization.

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Reference time sources

DCF77 – The abbreviation stands for: D: Germany, C: long wave transmitter, F: Frankfurt am Main, 77: transmission frequency 77.5 kHz.

The time signal transmitter DCF77 is a long wave transmitter in Mainflingen near Frankfurt am Main. DCF77 is the callsign assigned to the transmitter. With a range of 1,500 km, it provides Germany and western Europe with the legally valid time. The transmitter has an accuracy with a relative standard deviation of the transmitted time of 10-12 maximum, which corresponds to an error of one second in 30,000 years.

GPS – The Global Positioning System (GPS) is a global navigation satellite system for determining positions on Earth. The satellites each have an atomic clock and send out the exact time via GPS signal. In order to receive the signal, an antenna with a clear view of the sky is required. GPS time servers can be used anywhere in the world.