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A satellite receiving system and its control method

A technology of a receiving system and a control method, applied in the field of communication, can solve the problems of amplitude reduction, the inability of the set-top box to lock the frequency, the jitter of the 22K signal waveform, etc., to achieve the effect of preventing mutual interference

Active Publication Date: 2021-05-25
江苏银河数字技术有限公司
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Problems solved by technology

[0004] When two or more set-top boxes output pulse signals at the same time to instruct the LNB to select a high local oscillator to receive high-frequency satellite signals, the 22K signal waveforms entering the LNB will jitter because the phases of the 22K signals generated by two or more set-top boxes are different. , The amplitude is reduced, causing the LNB to not recognize, unable to switch and lock the local oscillator, and the set-top box cannot lock the frequency

Method used

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  • A satellite receiving system and its control method

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and the structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the protection scope of the present invention

[0015] The embodiments of the present invention can be applied to small network scenarios such as a home network. Taking the home network scenario as an example, multiple set-top boxes connected to different TVs in multiple rooms are connected to a satellite pot through a power divider to form a satellite TV receiving system to receive satellite signals and watch satellite programs. The satellite dish includes a feed source and a high-frequency head, etc. Compared with connecting multiple satellite dishes and multiple high-frequency heads, it is understandable that this can save space and cost.

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Abstract

The invention discloses a satellite receiving system and a control method thereof. The control method includes the following steps: when receiving instructions from the two set-top boxes that the dual local oscillator high-frequency head selects a high local oscillator to receive high-frequency satellite signals, turn on the 22k switch , control the first set-top box to send the first pulse signal to the dual local oscillator tuner and lock the frequency; control the second set-top box to send the second pulse signal to the dual local oscillator tuner and try to lock the frequency, and, at When the second set-top box fails to lock the frequency, turn off the 22k switch. Thereby, both set-top boxes can be made to work at the same time, and they can be prevented from interfering with each other.

Description

technical field [0001] The invention relates to communication technology, in particular to a satellite receiving system and its control method. Background technique [0002] In some small-scale network application scenarios such as home networks, due to space and cost constraints, a satellite dish and a low-frequency head (Low Noise Block, LNB) are usually used to amplify and down-convert the received satellite signal. And it is connected with a plurality of set-top boxes through a power divider, so that different TV sets can watch satellite programs through the set-top boxes. [0003] Since satellite signals include high-frequency band signals (such as 11.5GHz-12.75GHz Ku-band signals, etc.) and low-frequency band signals (such as 10.7GHz-11.9GHz Ku-band signals, etc.), the set-top box generally selects a high local oscillator (such as 10.6GHz, etc.) through the LNB. Or low local oscillator (such as 9.75GHz, etc.), to reduce the high-frequency or low-frequency satellite si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/20H04N21/426H04N21/61
CPCH04N7/20H04N21/42607H04N21/6143H04N21/6193
Inventor 杨帆汤林春顾洪春
Owner 江苏银河数字技术有限公司
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