A kind of att control method of managed household optical receiver

A control method and receiver technology, applied in the direction of electromagnetic receivers, etc., can solve the problems of affecting the accuracy of output RF radio frequency signals, slow speed, no ATT, etc., and achieve the effects of improving response time, high efficiency, and easy code implementation

Active Publication Date: 2017-12-19
四川璧虹电子信息技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the receivers of traditional CATV fiber-to-the-home generally do not have the ATT function, even if they have the ATT function, the speed of realizing the ATT function is mostly slow, which greatly affects the accuracy of the output RF signal

Method used

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  • A kind of att control method of managed household optical receiver
  • A kind of att control method of managed household optical receiver
  • A kind of att control method of managed household optical receiver

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Embodiment

[0040] The invention provides an ATT control method of a managed household optical receiver, which is used for the managed household optical receiver. The structure of the entire managed household optical receiver is as follows: figure 1 As shown, it mainly consists of connector, photoelectric conversion circuit (PIN w / oWDM), optical power detection circuit, MCU, two amplifiers, digital control attenuator, RF level detection circuit, AGC signal transmission circuit, ATT signal transmission circuit and Signal acquisition circuit composition.

[0041] Wherein the optical power detection circuit, the MCU and the AGC signal transmission circuit form the AGC control circuit, the input end of the optical power detection circuit is connected with the photoelectric conversion circuit, and the output end is connected with the optical power signal input port of the MCU. The AGC control signal output terminal of the MCU is connected with the AGC control terminal of the numerical control...

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Abstract

The present invention provides an ATT control method for a managed household optical receiver. The method includes the following steps: (1) the MCU samples the RF radio frequency signal output by the current optical receiver to obtain the RF radio frequency signal value; (2) receives the user Set the currently required attenuation, and look up the table according to the attenuation to find the ATT control voltage value; (3) adjust the control voltage of the secondary amplifier according to the ATT control voltage value to realize ATT control. The speed of realizing the ATT function in the invention is much faster than the traditional method of calculating by algorithm, so that the response time of the receiver can be effectively improved; and the way of MCU looking up the table is far simpler and more efficient than the way of traditional algorithm calculation, and the code realization is also easier .

Description

technical field [0001] The invention relates to the field of optical receivers, in particular to an ATT control method of a managed household optical receiver. Background technique [0002] At present, the entire radio and television industry is in the process of promoting the integration of "three networks", and the competition with China Telecom, China Unicom and China Mobile is becoming more and more fierce. If the industry wants to actively participate in market competition, it must also realize fiber-to-the-home. The fiber-to-the-home of radio and television is different from the fiber-to-the-home of operators such as telecommunications. Fiber-optic entry for TVs. [0003] At present, traditional CATV FTTH receivers generally do not have the ATT function, even if they have the ATT function, the speed of realizing the ATT function is mostly slow, which greatly affects the accuracy of the output RF radio frequency signal. Contents of the invention [0004] The purpose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/69
Inventor 莫镇阳窦云勇胡文鹏
Owner 四川璧虹电子信息技术有限公司
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