Abstract: This paper presents methods for clock comparison and frequency source calibration by means of standard time and frequency signals separated from TV signal. High accuracy achieved with standard signals disseminated via terrestrial TV network is a result of stable microwave link propagation characteristic. Geostationary satellites have recently become widely used for TV broadcast. Methods developed to determine accuracy limits for standard signals disseminated via satellite are also presented. Standard signals are extracted from TV signal in a specially designed receiver. Reference signals, used in measurements, are separated from high quality local quartz oscillators.
Key words: Dissemination of time, dissemination of frequency signal, TV network, geostationary satellites.