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- DCF77 abstract "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 transmitter are located at 50°0′56″N 9°00′39″E in Mainflingen, about 25 km 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.DCF77 is controlled by the Physikalisch-Technische Bundesanstalt (PTB), Germany's national physics laboratory and transmits in continuous operation (24 hours). It is operated by Media Broadcast GmbH (previously a subsidiary of Deutsche Telekom AG), on behalf of the PTB. With Media Broadcast GmbH, a temporal transmission availability of at least 99.7% per year or under 26.28 hours of annual downtime has been agreed upon. Most service interruptions are short-term disconnections of under two minutes. Longer lasting transmission service interruptions are generally caused by strong winds, freezing rain or snow induced T-antenna movement. This manifests itself in electrical detuning of the antenna resonance circuit and hence a measurable phase modulation of the received signal. When the maladjustment is too large, the transmitter is taken temporarily out of service. In the year 2002 almost 99.95% availability or just over 4.38 hours of downtime was realized. The timestamp sent is either in Coordinated Universal Time (UTC)+1 or UTC+2 depending on daylight saving time.The highly accurate 77.5 kHz (approximately 3871 metres wavelength) carrier signal is generated from local atomic clocks that are linked with the German master clocks at the PTB in Braunschweig. The DCF77 time signal is used for the dissemination of the German national legal time to the public.Radio clocks and watches have been very popular in Europe since the late 1980s and, in mainland Europe, most of them use the DCF77 signal to set their time automatically. Further industrial time-keeping systems at railway stations, in the field of telecommunication and information technology, at radio and TV stations are radio-controlled by DCF77 as well as tariff change-over clocks of energy supply companies and clocks in traffic-light facilities.".
- DCF77 thumbnail Dcf77.jpg?width=300.
- DCF77 wikiPageExternalLink dcf77.html.
- DCF77 wikiPageExternalLink Default.htm.
- DCF77 wikiPageExternalLink leapsecond.html.
- DCF77 wikiPageExternalLink qrg.globaltuners.com.
- DCF77 wikiPageExternalLink details.php?id=10730.
- DCF77 wikiPageExternalLink arduino-dcf77-radio-clock-receiver-hardware-2.
- DCF77 wikiPageExternalLink arduino-dcf77-radio-clock-receiver-library.
- DCF77 wikiPageExternalLink arduino-dcf77-radio-clock-receiver-signal.
- DCF77 wikiPageExternalLink www.dcf77.de.
- DCF77 wikiPageExternalLink dcf77.html.
- DCF77 wikiPageExternalLink PTBM_50a_DCF77_engl.pdf.
- DCF77 wikiPageExternalLink ?page_id=4.
- DCF77 wikiPageID "336118".
- DCF77 wikiPageLength "33122".
- DCF77 wikiPageOutDegree "101".
- DCF77 wikiPageRevisionID "705438574".
- DCF77 wikiPageWikiLink Amplitude-shift_keying.
- DCF77 wikiPageWikiLink Atomic_clock.
- DCF77 wikiPageWikiLink Binary-coded_decimal.
- DCF77 wikiPageWikiLink Braunschweig.
- DCF77 wikiPageWikiLink Call_sign.
- DCF77 wikiPageWikiLink Carrier_frequency.
- DCF77 wikiPageWikiLink Carrier_wave.
- DCF77 wikiPageWikiLink Category:Call_signs.
- DCF77 wikiPageWikiLink Category:Time_in_Germany.
- DCF77 wikiPageWikiLink Category:Time_signal_radio_stations.
- DCF77 wikiPageWikiLink Category:Transmitter_sites_in_Germany.
- DCF77 wikiPageWikiLink Central_European_Summer_Time.
- DCF77 wikiPageWikiLink Central_European_Time.
- DCF77 wikiPageWikiLink Chip_(CDMA).
- DCF77 wikiPageWikiLink Civil_defense.
- DCF77 wikiPageWikiLink Civil_defense_siren.
- DCF77 wikiPageWikiLink Clock_drift.
- DCF77 wikiPageWikiLink Coordinated_Universal_Time.
- DCF77 wikiPageWikiLink Cross-correlation.
- DCF77 wikiPageWikiLink Daylight_saving_time.
- DCF77 wikiPageWikiLink Decibel.
- DCF77 wikiPageWikiLink Deutsche_Telekom.
- DCF77 wikiPageWikiLink Direct-sequence_spread_spectrum.
- DCF77 wikiPageWikiLink Exclusive_or.
- DCF77 wikiPageWikiLink Frankfurt.
- DCF77 wikiPageWikiLink Frequency.
- DCF77 wikiPageWikiLink GLONASS.
- DCF77 wikiPageWikiLink GNSS_applications.
- DCF77 wikiPageWikiLink Germany.
- DCF77 wikiPageWikiLink Global_Positioning_System.
- DCF77 wikiPageWikiLink Gregorian_calendar.
- DCF77 wikiPageWikiLink Ionosphere.
- DCF77 wikiPageWikiLink Leap_second.
- DCF77 wikiPageWikiLink Linear_feedback_shift_register.
- DCF77 wikiPageWikiLink Longwave.
- DCF77 wikiPageWikiLink Loop_antenna.
- DCF77 wikiPageWikiLink Low_frequency.
- DCF77 wikiPageWikiLink Mainflingen.
- DCF77 wikiPageWikiLink Mainflingen_longwave_transmitter.
- DCF77 wikiPageWikiLink Microsecond.
- DCF77 wikiPageWikiLink Millisecond.
- DCF77 wikiPageWikiLink Morse_code.
- DCF77 wikiPageWikiLink Nanosecond.
- DCF77 wikiPageWikiLink Orders_of_magnitude_(time).
- DCF77 wikiPageWikiLink Parity_bit.
- DCF77 wikiPageWikiLink Phase-shift_keying.
- DCF77 wikiPageWikiLink Phase_modulation.
- DCF77 wikiPageWikiLink Physics.
- DCF77 wikiPageWikiLink Physikalisch-Technische_Bundesanstalt.
- DCF77 wikiPageWikiLink Pseudorandom_noise.
- DCF77 wikiPageWikiLink Pseudorandom_number_generator.
- DCF77 wikiPageWikiLink Quartz_clock.
- DCF77 wikiPageWikiLink Radio_clock.
- DCF77 wikiPageWikiLink Radio_propagation.
- DCF77 wikiPageWikiLink Satellite_navigation.
- DCF77 wikiPageWikiLink Signal_strength_in_telecommunications.
- DCF77 wikiPageWikiLink Skywave.
- DCF77 wikiPageWikiLink Speed_of_light.
- DCF77 wikiPageWikiLink Square_wave.
- DCF77 wikiPageWikiLink Summer_Time_in_Europe.
- DCF77 wikiPageWikiLink Surface_wave.
- DCF77 wikiPageWikiLink T-antenna.
- DCF77 wikiPageWikiLink TDF_time_signal.
- DCF77 wikiPageWikiLink Tangent.
- DCF77 wikiPageWikiLink Time_from_NPL.
- DCF77 wikiPageWikiLink Time_in_Germany.
- DCF77 wikiPageWikiLink Time_signal.
- DCF77 wikiPageWikiLink Transmitter.
- DCF77 wikiPageWikiLink Tropospheric_propagation.
- DCF77 wikiPageWikiLink Watch.
- DCF77 wikiPageWikiLink Weather_forecasting.
- DCF77 wikiPageWikiLink File:Atomuhr-CS2.jpg.
- DCF77 wikiPageWikiLink File:Bahnsteiguhr.jpg.
- DCF77 wikiPageWikiLink File:DCF77_code.svg.
- DCF77 wikiPageWikiLink File:DCF77_time.ogg.
- DCF77 wikiPageWikiLink File:Dcf77.jpg.
- DCF77 wikiPageWikiLink File:Dcf_weite.jpg.
- DCF77 wikiPageWikiLink File:Inside_radio_clock.jpg.
- DCF77 wikiPageWikiLink File:Low_cost_DCF77_receiver.jpg.
- DCF77 wikiPageWikiLink File:Sender_Mainflingen_09032015_10.JPG.
- DCF77 wikiPageWikiLinkText "Amplitude modulation".
- DCF77 wikiPageWikiLinkText "DCF77".