Abstract: A system of the type wherein transmissions of the same information are simultaneously broadcast by spatially removed transmitter sites. A control center establishes transmission links to the transmitter sites. The center includes electronic storage which supplies the required time delay for each signal applied over a predetermined link to assure phase coherency of overlapping transmissions. Upon the establishment of a new link, a new set of time delays is recalled from memory and used to program a bucket brigade to thereby provide the required delay to signals carried over the link.

Abstract: A receiver produced signal includes an information signal immediately preceded and followed by noise signals. The presence of an information signal is sensed by detector circuitry which, after an inherent delay interval, closes a squelch gate. The detector experiences an additional delay at the conclusion of an information signal.To prevent both deletion of the initial portion of the information signal and a noise "tail" following said signal, a delay line, comprised of a bucket brigade device, is series coupled between the receiver and the squelch gate. The delay provided by the delay line is approximately equal to the inherent delay time of the detector means.