VIPA SSM-BG41 - Fig. 3-58: Allocation of the DCF77 Antenna Modules Terminal Pins; Fig. 3-59: Plan of the Coded Time Information

Manual BG41/BG42/BG43 Interface modules
Rev. 99/49 3-77
3.2.10.4 Allocation of DCF77 antenna module’s terminal pins
Fig. 3-58: Allocation of the DCF77 antenna module’s terminal pins
3.2.10.5 The time plan
The following figure shows the temporal course of transmtting the coded time information from the
German time signal transmitter.
Fig. 3-59: Plan of the coded time information
The carrier frequency is 77,5 kHz. The coding of the time information is carried out in a BCD code
by reducing the carrier frequency by 25% at the start of a second for 100 ms as binary 0 or for 200
ms as binary 1.