System and method for providing a non-invasively tunable transce

Details System and method for providing a non-invasively tunable transce System and method for providing a non-invasively tunable transce

1995-06-15

1997-12-09

Urban, Edward F.

Telecommunications

Transmitter and receiver at same station

With frequency stabilization

455 671, 455 77, H04B 140

Patent

active

056970684

ABSTRACT:
A transceiver synthesizer includes components that enable it to be tuned non-invasively by software. The transceiver synthesizer includes a non-volatile memory (30) that can be non-invasively programmed with a digital value for each of a number of tuning variables. The digital values are converted by digital to analog converters (37, 38, 39) into tuning voltages. The tuning voltages are applied to voltage variable devices (60, 80, 95) that respond to changes in the applied tuning voltage to vary an operating characteristic thereof. The operating characteristics of the voltage variable devices (60, 80, 95) are non-invasively adjustable to tune the transceiver synthesizer for high and low port modulation deviation, reference oscillator make tolerance, automatic frequency control, reference oscillator temperature compensation etc.

REFERENCES:
patent: 5201063 (1993-04-01), Tam et al.
patent: 5423070 (1995-06-01), Vaisanen et al.
patent: 5548829 (1996-08-01), Suzuki et al.

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