Gain adjustment method for optical receiver

Abstract

The invention discloses a gain adjustment method for an optical receiver. The method comprises the steps of: S1, measuring a voltage value corresponding to an AGC chip in the optical receiver according to a gain attenuation value, and inversely calculating corresponding pwm duty ratios; S2, converting the pwm duty ratios into pwm count values, and arranging the pwm count values in sequence to obtain a corresponding pwm count value array in the AGC chip control range; S3, writing an AGC range needing gain into a webpage of an ONU or a serial port of the ONU; S4, judging whether the written AGCrange is within the AGC chip control range or not; and S5, carrying out AGC gain adjustment according to the gain pwm counting value array. The AGC range can be written into a webpage of the ONU or aserial port of the ONU, the AGC range is transmitted to the optical receiver through iic communication, and the AGC of the optical receiver can quickly and accurately achieve a gain adjustment function.

Description

Technical field [0001] The invention relates to the field of computer software, in particular to a gain adjustment method of an optical receiver. Background technique [0002] At present, EPON, GPON, and XPON technologies have become the technical standards for telecom operators’ access networks, while the two-way network of EPON, GPON, and XPON+CATV has become the mainstream of ONU optical receivers in FTTX. The core functions of optical receiver CATV are AGC and The function of ATT, AGC is automatic gain control, which is defined as automatic gain control. Its function means that the overall gain of the optical receiver is controlled by the received optical power. No matter how it changes within the specified optical power control range, it can be Keep the output level basically unchanged. ATT, or attenuator, is defined as an attenuator, which controls the overall gain attenuation of the optical receiver by inputting attenuation parameters, and it will attenuate uniformly with...

AI Technical Summary

Problems solved by technology

[0003] Using the ONU to manage the optical receiver CATV, you can view the parameters of the optical receiver CATV and set some parameters of the optical receiver CATV, but the setting of the AGC gear is often a sampling fixed state, that is, one AGC gear is a program, If the current AGC state cannot meet the customer's needs, it is necessary to modify the AGC state in the program and then burn it for testing. Repeating this will increase the workload of both parties and often fail to achieve satisfactory results.

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