The delay equalization of the London-Birmingham television cable system
作者:
J.W.Allnatt,
期刊:
Proceedings of the IEE - Part IIIA: Television
(IET Available online 1952)
卷期:
Volume 99,
issue 18
页码: 338-349
年代: 1952
DOI:10.1049/pi-3a.1952.0042
出版商: IEE
数据来源: IET
摘要:
A systematic method of design for delay equalizers with frequency ranges having a moderate ratio of maximum to minimum frequencies is outlined, and a description is given of the delay equalization of the 3–7-Mc/s carrier channels of the London-Birmingham coaxial-cable television relay system. For the transmission of B.B.C. 405-line television signals, the delay of each channel (as measured by noting he envelope delay of a variable-frequency carrier modulated by a 100-kc/s signal) has been equalized to within ± 0.06 microsec over the frequency range 3–7 Mc/s.
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