DCF77 is a German longwave time signal and standard- frequency radio station. It started service as a standard-frequency station on 1 January 1959. In June 1973, date and time information was added.

This document describes the protocol, gives examples of Cyber Sciences products that support DCF77, and describes how this legacy protocol is being replaced by PTP (Precision Time Protocol per IEEE …

The DCF77 radio controlled clocks receive the official time of the Federal Republic of Germany from Physikalisch-Technischen Bundesanstalt (PTB) in Braunschweig and transmit it to computers and …

Feb 20, 2021 · Here you will learn what the DCF77 radio clock signal is, how to receive it, how to evaluate it and how to use it optimally together with the library RTCLib.

The emission of time signals and standard frequency via DCF77 represents by far the best known and (also geographically) most widely spread procedure to disseminate the legal time realized by PTB for …

DCF77 is a long wave time keeping signal transmitting at 77.5 kHz from Frankfurt, Germany. It has been active since 1 January 1959. Using simple amplitude modulation, the signal encodes the current time …

The DCF77 control unit is currently being modified so that in future an announcement bit for a leap second can be sent. It is expected that for the first time on 1st July 1985 the second mark Nr. 19 will …

Oct 8, 2025 · The DCF600HS is Meinberg's most compact DIN rail-mounted DCF77-synchronized radio-controlled clock. An RS-232 interface is used to configure the system via a PC or laptop and also …

Aug 2, 2024 · The call sign “DCF77” originates from “D” which is for “Deutschland” (Germany), “C” stands for LF and “F” is for the proximity for Frankfurt/Main.

The DCF77 control electronics were adapted such that the data input to bits 1 to 14 which are broadcast via amplitude modulation is now provided by a third party.