The DCF 77E module operates as an internal receiver with integrated antenne.
The module receives and converts the received time signal in a 24 VDC signal in DCF77 format, and amplifies it before sending it on to the 140 ERT 854 10 module.
The time signal received in the Central European Time zone is known as the DCF77 and provides CET. It is sent from the atomic clock to the National Institute for Science and Technology Braunschweig, Germany, and sends a long wave signal of 77.5 kHz (from which DCF77 derives its name) via a transmitter in Frankfurt am Main. The signal can be received throughout Europe (in a radius of approximately 1000 km from Frankfurt).
When selecting a location for erecting an antenne, the following sources of interference should be taken into account which could disturb or destroy signal reception through their DCF receivers:
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electromagnetically contaminated areas. Avoid areas with potential sources of interference, such as strong transmitters, switching stations and airports. Strong interference can also be caused by industrial machinery and cranes.
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Steel supports in buildings, rooms and appartments. Poor reception can occur in cellars, underground car parks and closed operating cabinets.
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"Shadows" and "dead band" in mountain areas, high buildings, ...
