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Passive optical network multi-user unit radiation emission positioning rectification method

A multi-user unit and passive optical network technology, applied in the field of radiation emission positioning rectification of passive optical network multi-user units, can solve the problems of delayed development progress, unqualified radiation emission, troubled hardware R&D personnel, etc., to reduce gaps, Quickly and accurately rectify and strengthen the effect of filtering

Active Publication Date: 2019-05-28
TAICANG T&W ELECTRONICS CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

The unqualified radiation emission of MDU has become an important factor and difficult problem that plagues hardware developers and delays project development progress.

Method used

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  • Passive optical network multi-user unit radiation emission positioning rectification method
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  • Passive optical network multi-user unit radiation emission positioning rectification method

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The principle of EMI generation:

[0029] The electric field and magnetic field are produced with the action of voltage and current, mainly due to the influence of the rate of change of voltage and current dI / dt and dv / dt per unit time. If dI / dt and dv / dt are higher, the corresponding electric field and magnetic field interference will be less stronger.

[0030] EMI (Electromagnetic Interference) Radiation Propagation Path: Noise propagates in the form of the characteristics of electric waves, electric fields and magnetic fields.

[0031] For EMI test rectification, it is necessary to dete...

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Abstract

The invention relates to the field of electronic communication, in particular to a passive optical network multi-user unit radiation emission positioning rectification method. The method comprises thefollowing steps: diagnosing a source and a propagation path of interference; performing the safe grounding and lap joint of EMC in advance; removing unneeded frequency components from a frequency domain through filtering, thereby reducing the electromagnetic interference from the aspects of conduction and radiation; inhibiting various types of electromagnetic interferences propagated spatially byshielding; replacing a suspicious element with an element meeting the EMC requirement; reducing the output energy of the crystal oscillator and harmonic waves of the crystal oscillator for a crystaloscillator product through a method of connecting resistors in series or connecting resistors in parallel. Starting from the source, the method reduces the radiation energy, destroys or changes the path of radiation interference from the source, reduces the gaps, enhances the filtering, changes the position of a line to destroy the radiation mechanism, and can achieve the quick and accurate passive optical network multi-user unit radiation emission positioning rectification.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a rectification method for radiation emission positioning of multi-subscriber units in a passive optical network. Background technique [0002] With the development of communication, light source optical network PON products are more and more widely used, and MDU multi-user terminal unit is one of the more complicated ones. Meeting the EMC requirements of electromagnetic compatibility is a necessary prerequisite for products to go global. The unqualified radiation emission of MDU has become an important factor and difficult problem that plagues hardware developers and delays project development progress. [0003] EMC rectification refers to the compensation method adopted after the product has problems in the EMC test process. The purpose of the EMC rectification work is to reduce the interference generated by the EUT itself and meet the standard requirements. At the same...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/00H04B10/03H04B10/079H04Q11/0067H04Q2011/0083H05K9/0098
Inventor 蔡云枝曹鹏王海波
Owner TAICANG T&W ELECTRONICS CO LTD
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