Abstract:
A method for directly generating a data representing signal corresponding to a single sideband of a data modulated carrier signal and suitable for transmission over a limited frequency network. The signal comprises the summation of a number of bit representing pulse sequences, each sequence including a central bit indicating pulse and both preceding and following echo pulses. The pulses are generated by digital techniques and their spacing and amplitude are so selected that after passing through a low-pass filter, the resultant signal has no frequency components outside of a predetermined frequency band.
Abstract:
A multipoint connection system adapted to operate in the time-division multiplex mode. The system includes an output link (21), connected to the output of a control station (10) and to the input of each of the work stations (WS-1, WS-2), and a U-shaped input link (22) one leg of which has its end connected to the input of the control station and the other leg (22-2) of which is terminated by an impedance (Z2) and is connected to the output of each work station. The signals on the output link and on leg (22-2) travel in the same direction, thereby eliminating the need to provide adjustable means of determining the transmission times specific to each work station.
Abstract:
MULTIPOINT SYSTEM FOR INTERCONNECTING WORK STATIONS A multipoint connection system adapted to operate in the time-division multiplex mode. The system includes an output link, connected to the output of a control station and to the input of each of the work stations, and a U-shaped input link one leg of which has its end connected to the input of the control station and the other leg of which is terminated by an impedance and is connected to the output of each work station. The signals on the output link and on leg travel in the same direction, thereby eliminating the need to provide adjustable means of determining the transmission times specific to each work station.