Full duplex RF repeater/base station providing microprocessor-co

Details Full duplex RF repeater/base station providing microprocessor-co Full duplex RF repeater/base station providing microprocessor-co

1993-06-01

1994-07-05

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at separate stations

455 15, 455 381, 455 531, 370 26, H04B 140, H04B 715

Patent

active

053275802

ABSTRACT:
A microcomputer within a duplex RF transceiver operates in an interrupt-driven manner to simultaneously encode and decode CTCSS signalling (with one microcomputer interrupt service routine being devoted to CTCSS encode, and another microcomputer interrupt service routine being devoted to CTCSS decode). Such encoding and decoding of CTCSS signalling is accomplished using minimal external control hardware (e.g., two flip flops and an inexpensive conventional multipurpose counter/timer chip). The resulting arrangement is inexpensive, reliable and requires only a few components in addition to the appropriately programmed microcomputer in order to provide simultaneous encoding and decoding of CTCSS signals in a full duplex RF transceiver context.

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