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What is a DCF signal?

What is a DCF signal?

It said: ‘The DCF signal (time signal transmitter) consists of time pulses emitted by one of the most accurate clocks in the world close to Frankfurt / Main, Germany – this varies by 1 second in a million years. ‘Your radio-controlled clock receives these signals under ideal conditions up to a distance of approx.

Do atomic watches work in Australia?

Australia utilized Radio VNG as the national time signal service operating at 4.5, 7.5 or 12 MHz. In fact there is an atomic clock controlling the time in each GPS satellite. The downfall is that GPS signals are generally less effective indoors, where a lot of Atomic Clocks live.

Do citizen radio controlled watches work in Australia?

In other countries like Japan, Europe and the US, dedicated radio networks broadcast the special time pulses necessary to set radio controlled watches, but, unfortunately, there is no radio station in Australia which broadcasts the time signals needed to set the watch.

What is citizen atomic timekeeping?

Capturing a time signal from an atomic clock accurate to 1 second every 100,000 years, iRadio-Controlled auto-corrects the time and calendar in your watch. Combined with CITIZEN’s light-powered Eco-Drive technology, the result is ultraprecise timekeeping. with no need to replace batteries or adjust the time.

Where can I get an accurate time signal?

The MSF radio signal is a dedicated standard-frequency and time broadcast that provides an accurate and reliable source of UK civil time. It is available 24 hours a day across the whole of the UK and beyond.

How does DCF77 transmit time code information?

The time code transmitter DCF77 emits a time signal and time code information in the long wave range of 77.5 kHz. The time information is visualised by the lowering of the carrier power to 25% of the standard value (amplitude modulation). The beginning of a second is marked by the beginning of a lowering.

What is the range of the DCF77 transmissions?

With a relatively high power of 50 kW, the DCF77 transmissions can reliably be received in large parts of Europe, as far as 2,000 km (1,243 mi) from the transmitter in Mainflingen. Within this range the signal strength of the DCF77 signal as specified by the Physikalisch-Technische Bundesanstalt (PTB) is ≥ 100 µV/m.

What is the accuracy of the DCF77 long radio wave signal?

The accuracy of the DCF77 long radio wave signal is 1ms. To enhance the signal accuracy the PTB sends out a pseudorandom noise ( PZF ), like this a signal accuracy up to 1µs can be achieved.

How accurate is the DCF77 timesignal?

In general: the inaccuracy of the received DCF77 timesignal is large compared to the emitted time signal. The reception depends largely on the limited wave band of the time signal transmitter and other natural interferences. At a distance of some 100 kilometres, a time signal uncertainty of less than 0.1 ms is achievable.