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Test method for simulated down-converter in satellite demodulator

A technology that simulates down-conversion and satellite demodulators, applied in the field of satellite communications, to achieve the effect of accurate test methods

Inactive Publication Date: 2012-07-11
CHENGDU LINHAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no test method specifically for the analog down-converter in the multi-channel VSAT satellite digital demodulator in the domestic and foreign literature.

Method used

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  • Test method for simulated down-converter in satellite demodulator

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0064] Such as figure 1 As shown, the test method of the analog down-converter in the satellite demodulator of the present invention is used to test the parameters of the analog down-converter, and the analog down-converter includes an input interface, an output interface, a control interface and a power supply interface, First, connect the signal source, spectrum analyzer, PC, and DC power supply to the input interface, output interface, control interface and power interface of the analog down-converter in sequence. The equipment required for the test and its required use are shown...

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Abstract

The invention discloses a test method for a simulated down-converter in a satellite demodulator. The test method is used for testing various parameters of the simulated down-converter. The simulated down-converter comprises an input interface, an output interface, a control interface and a power interface, wherein a signal source, a frequency spectrograph, a PC (Personal Computer) machine and a direct current power supply are connected with the input interface, the output interface, the control interface and the power interface of the simulated down-converter in turn. The frequency range test, the frequency resolution test, the gain and gain flatness test, the gain stability test, the fixed attenuation test, the wide / narrow band switching test, the AGC (Automatic Gain Control) function test and the AGC threshold test are performed in turn. The test method provided by the invention is accurate, stable and reliable. After all the parameters of a VSAT (Very Small Aperture Terminal) simulated down-converter meet the demand, the satellite demodulator is switched on.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a test method for an analog down-converter in a satellite demodulator. Background technique [0002] VSAT (Very Small Aperture Terminal, Very Small Aperture Terminal) refers to a type of very cheap intelligent small or micro earth station with a very small aperture antenna, which can be easily installed at the user's place. The VSAT satellite communication network is generally a satellite communication network composed of a large number of VSAT small stations and a master station working together. [0003] In satellite communication, the satellite downlink microwave signal received by the ground antenna in the satellite ground receiving system becomes very weak after long-distance transmission, and the satellite downconverter is required to amplify and convert the received satellite downlink frequency signal, and then send it to The demodulator in the ground rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/02H04B17/40
Inventor 吴伟林杨宇航吴博罗均孙建中何戎辽
Owner CHENGDU LINHAI ELECTRONICS
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