Method for operating an apparatus for facilitating communication

Coded data generation or conversion – Analog to digital conversion followed by digital to analog...

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341126, 341142, 341173, H03M 100

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active

050217836

ABSTRACT:
A method for operating an apparatus for facilitating communications between an analog device and a digital device, which apparatus includes a plurality of signal processing circuits and a control circuit for controlling the signal processing circuits. Each of the signal processing circuits includes signal attenuators and signal burst discrimination circuitry. The apparatus is operable in a plurality of stable states, preferably in an idle stable state, a transmit stable state, and a receive stable state. The apparatus also is operable in a plurality of transitional states, including up-transition states and down-transition states. The method includes the steps of evaluating each of the signal processing circuits by the signal burst discrimination circuitry, responding to detection of a burst indicator by setting a state indicator to an appropriate up-transition state, incrementally adjusting the attenuators in the signal processing circuits to enhance performance of the apparatus until the attenuators are at predetermined settings, periodically checking for presence of the burst indicator, on detection of cessation of the burst indicator, setting the state indicator to an appropriate down-transition state, incrementally adjusting the attenuators to redistribute attenuation losses among the signal processing circuits, if no burst indicator is detected, continuing such redistribution until the apparatus returns to the idle stable state.

REFERENCES:
patent: 4355304 (1982-10-01), Kasuga et al.
patent: 4578667 (1986-03-01), Hollister
patent: 4652857 (1987-03-01), Meiksin
patent: 4851842 (1989-07-01), Iwamatsu
patent: 4958139 (1990-09-01), Hyatt

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