Abstract
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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