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Module control circuit on cable television Ethernet coaxial-cable transmission local side

A technology of coaxial cable transmission and cable TV, which is applied in the direction of cable transmission adaptation and optical transmission television systems, etc., can solve the problems of complex maintenance and management, large number of front-end equipment, etc., and achieve high bandwidth, low noise concentration, and transformation costs low effect

Active Publication Date: 2012-10-10
CHANGSHU GAOSHIDA PHOTOELECTRICITY TECH
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AI Technical Summary

Problems solved by technology

This method has a large number of front-end devices and complex maintenance and management, which puts great pressure on the upgrade and expansion of the back-end IP MAN.

Method used

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  • Module control circuit on cable television Ethernet coaxial-cable transmission local side

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Embodiment Construction

[0017] Refer to the picture: the control circuit of the cable TV Ethernet coaxial cable transmission local end module is to output 12V DC voltage after power-on, output 10V DC voltage through the voltage regulator chip Q1, output 3.3V DC voltage through the step-down regulator chip U7, and output through the synchronous step-down The conversion chip U8 outputs 1V DC voltage, the local end module works, the main chip U1 power line broadband communication chip reads the stored program in the U5 chip, and maps the program to the U3 high-speed synchronous memory chip for processing to realize signal modulation and demodulation Function, it demodulates the uplink signal from the EOC terminal and sends it to the Internet as an IP packet, and performs OFDM (Orthogonal Frequency Division Multiplexing, - Orthogonal Frequency Division Multiplexing) modulation on the downlink signal from the Internet before sending it For the EOC terminal, the U4 chip amplifies the uplink RF signal to th...

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Abstract

A module control circuit on a wired television Ethernet coaxial-cable transmission local side belongs to the technical field of cable televisions and comprises capacitors C1-C64, resistors R1-R65, light emitting diodes (LED) D1-D4, diodes D5-D7, inductances L1-L12, triodes V1-V5, a signal coupler Z1, crystal oscillators Y1-Y2, a socket J1, a network interface RJ1, chips U1-U5, U7-U8, and Q1 and atransformer U6, wherein the U1 is an INT6400 chip, the U2 is an IP101A chip, the U3 is a W9825G6JH-6 chip, the U4 is an INT1400 chip, the U5 is a 25Q16BWSIG chip, the U6 is an H1601CG transformer, the U7 is a TD1401 chip, the U8 is an SY8009 chip, and the Q1 is an LM1117F chip. The control circuit has the advantages of being small in noise convergence, coincident to an IP (internet protocol) mode, lower in reforming cost of each household averagely, convenient for upgrade and capacity expanding, and high in reliability, and being capable of providing high band width.

Description

technical field [0001] The invention relates to an NGB (Next Generation Broadcasting, next-generation radio and television network) Ethernet coaxial cable transmission local end module control circuit for the three-network fusion transformation of a cable TV network, which belongs to the technical field of cable TV, especially a hybrid optical fiber coaxial cable A central office module based on cable TV two-way transmission for the transformation of the axial cable network EOC (Ethernet Over Cable Ethernet coaxial cable transmission) network. Background technique [0002] On December 4th, the Ministry of Science and Technology and the State Administration of Radio, Film and Television jointly signed the "National High-performance Broadband Information Network and China's Next Generation Radio and Television Network Independent Innovation Cooperation Agreement". In the "Cooperation Agreement", the concept of NGB was first proposed, marking the The official launch of the NGB ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/10H04N7/22
Inventor 饶思霆高洋王伟民张怡
Owner CHANGSHU GAOSHIDA PHOTOELECTRICITY TECH
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