Local area time dissemination by carrier‐current waves

Carrier‐current waves (CCW) on ac power lines have been used to build up a new type of transmission network for timing signals. The peculiarities of the information carrier characterize its behavior as a standard frequency relay. Already existing very low‐frequency (VLF) timing receivers and constructed ad hoc transmitters have been used. Results reported here of tests carried out over extended time periods show that high precision and reliability are obtainable.