Title :
Standard frequency dissemination via the digital satellite TV network
Author :
Sojdr, Ludvik ; Cermak, Jan ; Buzek, Otokar
Author_Institution :
Inst. of Radio Eng. & Electron., Czechoslovak Acad. of Sci., Prague, Czech Republic
Abstract :
The television companies´ transmission networks may serve as an excellent means for standard frequency dissemination. In the Czech Republic a system is in operation which references the black/burst frequencies of Czech Television (CTV) programs to UTC(TP) generated at the Institute of Radio Engineering and Electronics (IREE). The remarkable potential of the terrestrial networks will be demonstrated with 5 ns of white phase noise. Difficulties in conjunction with the digital satellite transmission will be discussed. Large Doppler shifts may be reduced by closing the dissemination loop but residuals remain at distant locations. Analysis has been made to estimate the worst-case accuracy zones around the country. The compression encoding used for the satellite transmission causes additional white phase noise of 100 ns
Keywords :
Doppler shift; digital television; direct broadcasting by satellite; frequency stability; frequency standards; phase noise; synchronisation; television networks; white noise; Czech TV programs; UTC(TP) time scale; black/burst frequencies; closed loop dissemination; digital satellite TV network; frequency stability; large Doppler shifts; open loop system; signal delaying; standard frequency dissemination; video compression encoding; white phase noise; worst-case accuracy zones; Clocks; Doppler shift; Frequency synchronization; Metrology; Phase noise; Pulse generation; Satellite broadcasting; Signal generators; Stability; TV;
Conference_Titel :
Frequency Control Symposium, 1998. Proceedings of the 1998 IEEE International
Conference_Location :
Pasadena, CA
Print_ISBN :
0-7803-4373-5
DOI :
10.1109/FREQ.1998.717917
