Bidirectional radio frequency level adjusting circuit for EOC and control method thereof

Abstract

The invention discloses a bidirectional radio frequency level adjusting circuit for an EOC and a control method thereof, which belong to the technical field of network communication and radio and television. The method comprises the steps: an EOC terminal is powered on and enters an automatic control mode, and an EOC main chip IC1 controls the EOC terminal to work in a straight-through mode to wait for being on line; after the EOC terminal is online, the intensity of a received signal is judged; if signal intensity is normal, the straight-through mode is kept, if the signal intensity is too high, the EOC main chip IC1 controls the attenuation adjustment chip IC3 to work under high attenuation, and if the signal intensity is too low, the radio frequency amplification chip IC4 is connected to the uplink radio frequency link during signal sending, and the downlink radio frequency link works under the straight-through mode during signal receiving; and the EOC terminal monitors the signal intensity in real time and controls the signal channel according to the previous step. The radio frequency signal intensity can be adjusted automatically or remotely and manually according to the signal quality so as to adapt to broadcast television coaxial networks under different attenuation and different network conditions.

Description

technical field [0001] The invention belongs to the technical field of network communication and radio and television, and in particular relates to a two-way radio frequency level adjustment circuit for EOC and a control method thereof. Background technique [0002] FTTH network transformation has become the preferred solution for telecom operators, and has been gradually adopted by radio and television operators. However, during the implementation process, due to the abandonment of the original HFC network of radio and television and the re-laying of passive optical networks, there are large investment and construction costs. Difficult problems have hindered the rapid development of radio and television network transformation. With the emergence of high-bandwidth coaxial access EOC technologies such as HiNOC2.0 and MoCA2.5 (hereinafter referred to as the new generation of EOC products), the data throughput rate reaches 1Gbps or even 2.5Gbps, which can already approach or ex...

AI Technical Summary

Problems solved by technology

However, high-performance bandwidth means that more frequency band resources need to be used for support. The frequency band resources occupied by the first generation EOC are about 50MHz, and later increased to 100-500MHz. Due to the limitation of radio frequency resources, radio and television networks can only use High-frequency resources above 860MHz, however, my country's radio and television network generally uses a passive distribution network of 1000MHz, which only guarantees the radio frequency indicators within 1000MHz, but cannot guarantee the radio frequency indicators other than 1000MHz, and the attenuation increases with the frequency As a result, the new generation of EOC technology can only be applied to networks with good network conditions or low line attenuation, which limits the promotion and application of the new generation of EOC technology

[0003] In view of the above existing technologies, it is necessary to develop an automatic switching circuit that can automatically adjust the state for different attenuation and different network conditions, so as to improve the output power of the new generation of EOC products and effectively solve the problem that the existing network restricts the development of the new generation of EOC technology. Problem, for this reason, the applicant has made beneficial design, and the technical scheme that will introduce below is exactly produced under this background

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