Process and a circuit arrangement for signal transmission using

Details Process and a circuit arrangement for signal transmission using Process and a circuit arrangement for signal transmission using

1983-11-17

1984-12-18

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

381 15, 381 16, H04J 900

Patent

active

044894112

ABSTRACT:
For the simplified text or picture data signal transmission through a broadcasting system, an additional phase and/or frequency modulation is produced in amplitude modulated transmitters. In a preferred but relative slow transmission system, a frequency modulation (f.sub.1 -f.sub.n) occurs in a band width of .+-.25 Hz, whereby the transmitted quality of the simultaneously transmitted broadcast does not suffer. Depending on the type of transmission means, equipment and frequency (f.sub.o) of the carrier wave (T), this band width can be increased, for example during text transmission, in order to achieve a higher transmission speed. The system is compatible with AM mono and stero equipment as well as with printing and display installations of the electronic data processing and communication technologies.

REFERENCES:
patent: 2808508 (1957-10-01), Sinninger
patent: 2912492 (1959-11-01), Haantjes et al.
patent: 3506784 (1970-04-01), Garland
patent: 3553367 (1971-01-01), Krauss
patent: 3916344 (1975-10-01), Enderby
patent: 4088968 (1978-05-01), Pradal et al.

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