Circuitry determining selected time signals from data information - transmits bit-coded from radio transmitter with data information modulated two at 100 Hz of carrier frequency at first second of minute and at 1 Hz at beginning of second second of same minute

摘要

The bit coded signal from the radio transmitter is modulated at a first frequency of 100 Hz in part of the first second of a minute and, upon the start of the second second of the same minute, is modulated by a second frequency of 1Hz of a carrier frequency. A first monostable trigger element (MK1) has a pulse time larger than the first part of the first second at the first frequency so that, after expiry of the pulse time, a second monostable trigger element (MK2) starts as a pulse time of 1 ms. The second monostable trigger element connects to a NAND - element (NG) such that, with no data information after the part of the first second, a reset pulse (RI) is produced. Upon each starting pulse (AI) of the first monostable trigger element, the value of a counter (ZE) is increased to the value `one`. Upon a reset pulse the counter is set to the selected value `zero`. The counter produces a time selected minute pulse upon reaching of value `sixty`. ADVANTAGE - Time signal evaluation from which in GB transmitted clock time telegram is made possible.