DCF77

thumb|Low-cost DCF77 receiver

Described at

DCF77 - Signal Identification Wiki

DCF77 is a German longwave time signal radio station based at 77.5 kHz. DCF uses an AM modulated carrier and phase modulation sidebands to transmit its time signal.

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Frequencies 77.5 kHz Frequency Range 77.5 kHz - 77.5 kHz Mode USB Modulation AM,PSK ACF 1000 ms Emission Designator — Bandwidth 1.3 kHz Location Germany Short Description DCF77 is a German longwave time signal radio station based at 77.5 kHz. DCF uses an AM modulated carrier and phase modulation sidebands to transmit its time signal. I/Q Raw Recording — Audio Sample DCF77 is a German longwave time signal radio station based at 77.5 kHzKiloHertz (kHz) 10^3 Hz. DCF uses an AMAmplitude Modulation modulated carrier and phase modulation sidebands to transmit it's time signal. DCF77 is located near the town of Mainflingen.

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Encyclopedic overview

20 sections

Contents

Location of antennas
Signal
Time signal
Experimental civil defence emergency signal
Civil protection and weather forecast signal
Future and call sign
Time code details
Amplitude modulation
Phase modulation
Time code interpretation
Reception area
Control
Accuracy
Transmission
Reception
Network Time Protocol reference clock use
See also
References
Further reading
External links

thumb|Low-cost DCF77 receiver

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. Its primary and backup transmitters are located at in Mainflingen, about south-east of Frankfurt am Main, Germany. The transmitter generates a nominal power of 50 kW, of which about 30 to 35 kW can be radiated via a T-antenna.

Excerpted from Wikipedia’s “DCF77” article, available under the CC BY-SA 4.0 licence.