Time signal broadcast from Mainflingen near Frankfurt
A continuous carrier signal is lowered at one second intervals. A lowering for 0.1 s indicates logical zero, a lowering for 0.2 s logical one. There is no lowering in the 59th second to indicate the start of the zero second in the next minute. Thus 59 bits of information about date, time, etc. can be transmitted every minute (seconds 0 through 58). Transmitter identification is no longer broadcast. By lowering the carrier rather than blanking it, the transmission frequency can also be used as a reference fre-quency.