A dual-threshold receiver gain control device and its control method

Abstract

The present invention discloses a gain control device based on dual-threshold receiver and a control method thereof, which relates to the technical field of communication. The device comprises: a network module circuit, an variable amplitude local oscillator output circuit, an analog-digital conversion AD circuit, a digital-analog conversion DA circuit, a control circuit and a receiver analog part circuit; the control method comprises: opening the AGC function, the upper computer setting average voltage scope of the receiver, average voltage value of the AD acquisition receiver by network control; the CPU comparing the voltage value acquired with the set voltage value, adjusting the step value according to the deviation to the threshold; the CPU based on the step value controlling the DA circuit to output a voltage to control the amplitude of local oscillator output, making the audio output average voltage of the receiver to be constant in the target scope through multiple adjustments. The control device and the method based on dual-threshold receiver of the present invention can make the audio output average value of receiver to be constant in target scope rapidly.

Description

technical field [0001] The invention relates to a dual-threshold based receiver gain control device and a control method thereof, belonging to the communication field. Background technique [0002] In the prior art, the control of the output voltage is generally realized through manual control, which is not conducive to remote control. When it is necessary to keep the output voltage constant, when the automatic gain control output voltage is used, if the ordinary automatic gain control (AGC: Automatic Gain Control) method is used, the output step size can only be increased once. When the average value of the output is relatively low, It takes a long time to reach a constant output average voltage. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dual-threshold receiver gain control device and its control method, which can network control the average value of the output audio signal of the receiver and make it c...

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Problems solved by technology

[0002] In the prior art, the control of the output voltage is generally achieved through manual control, which is not conducive to remote control

When it is necessary to keep the output voltage constant, when the automatic gain control output voltage is used, if the ordinary automatic gain control (AGC: Automatic Gain Control) method is used, the output step size can only be increased once. When the average value of the output is relatively low, It takes a long time to reach a constant average output voltage

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