Pulse or digital communications – Repeaters – Testing
Patent
1990-01-29
1992-06-09
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
178 71R, 178 71T, 2461661, 246167R, H04L 2520
Patent
active
051214105
ABSTRACT:
The method for the transmission of data or commands, in alternating duplex mode between a first port (2) connected to a first of transmission lines, and a second port (3) connected to a second pair of transmission lines, comprises: a step (A) of detection and processing of data at the input of either of the said ports, then designated as the input port, the other port being designated as the output port, followed by a step (B) of blocking any transmission of possible signals coming from the output port towards the input port, a step (C) of transmission of the said data from the input port to the output port when data are detected at the input of the input port, and in the opposite case followed by a step (D) of blocking the transmission of all possible signals from the input port to the output port, leding to step (A) again. The data presented to any of the said ports are in the form of an amplitude modulation of an alternating carrier signal having a predetermined carrier frequency, and the step (A) of detection and processing comprises a step of identification of the predetermined carrier frequency and a step of extraction of a useful signal representative of the said data to be transmitted.
REFERENCES:
patent: 2947816 (1960-08-01), Hysko
patent: 3040130 (1962-06-01), Hughes
patent: 3234541 (1966-02-01), Paull
patent: 3757301 (1973-09-01), Regan et al.
patent: 4154978 (1979-05-01), Tu
patent: 4574373 (1986-03-01), Ahola
patent: 4577327 (1986-03-01), Nambu
patent: 4872183 (1989-10-01), Egami
Faiveley Transport
Safourek Benedict V.
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