GB/T 39847-2021Verification test methods of access satellite netword for FSS communication earth station (English PDF)
固定卫星通信业务地球站进入卫星网络的验证测试方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
March 9, 2021
Implementation date
October 1, 2021
Scope
GB/T 39847-2021 is the English-translated version of 固定卫星通信业务地球站进入卫星网络的验证测试方法.
GB/T 39847-2021 fixes the verification tests an earth station has to pass before it is admitted to a satellite network. It specifies the test items and the test methods for that verification: the transmit and receive characteristics, the antenna pattern, the frequency and power stability, the polarisation and the control of the emissions.
It applies to the earth stations of fixed satellite services working with the geostationary satellites of Chinese operators. Satellite operators, station owners and test bodies use it. Issued on 9 March 2021, it has applied since 1 October 2021.
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Document preview — GB/T 39847-2021
National Standard of the People's Republic of China
- ICS
- 33.060.30
- Classification
- M 35
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Abbreviations
- 4 Test condition
- 4.1 Test site
- 4.2 Co-Test Antenna
- 4.3 Test equipment and instruments
- 4.4 Outdoor test environment
- 4.5 Satellite frequency selection for test
- 4.6 Test preparation
- 5 Antenna emission pattern verification test method
- 5.1 Antenna near-angle rotation speed and far-angle rotation speed measurement
- 5.2 Other preliminary parameters
- 5.3 Satellite method
- 5.4 Standardized Tower Method
- 6 Calculation method of antenna transmission gain verification test
- 7 Antenna emission cross-polarization isolation verification test method
- 7.1 Verification test method for static transmission cross-polarization isolation of earth station
- 7.2 Mobile platform earth station (used in movement) dynamic emission cross-polarization isolation verification test method
- 8.1 Mobile platform earth station pointing accuracy verification test method
- 8.2 Tracking accuracy verification test method for mobile platform earth station (used in movement)
- 8.3 Test method for verification of off-axis emission suppression function of mobile platform earth station
- 8.4 Calculation method for verification test of mobile platform earth station's maximum uplink capability
- 8.5 Test method for verification and test of PSD control function of earth station on mobile platform
- 9 Out-of-band radiation verification test method
- 9.1 Verification test method for spurious radiation (without intermodulation products)
- 9.2 Uplink intermodulation noise verification test method
- 10 Modulation characteristic verification test method
- 10.1 Schematic diagram of the test system
- 10.2 Test Step
- 11 Transmitting frequency and power stability verification test method
- 11.1 Schematic diagram of test system
- 11.2 Test Step
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Introduction
The purpose of this standard is to ensure that the satellite communication earth station performs the network access verification test before entering the domestic satellite network operation.
The standardization of the test method facilitates the approval and supervision of the new satellite communication earth station by the national radio management department, and facilitates the prevention of unsatisfactory entry in advance.
The satellite communication earth station required by the network technology enters the network operation, so as to prevent it from affecting the existing user communication links and neighboring satellite networks in the satellite network after it enters the network.
Inter-satellite networks cause interference, and guide the satellite communication earth station to reach the system index that meets the network access standard.
1 Scope
This standard specifies the tests for the network access verification test items that the satellite communication earth station should carry out before entering the domestic satellite communication system method.
This standard applies to fixed satellite services that use geostationary satellites (GSO) operated by satellite operators in my country.
This standard applies to satellite communication earth stations in the C-band and Ku-band, and satellite communication earth stations in other frequency bands can be used as a reference.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated reference documents, the latest version (including all amendments) is applicable to this document.
GB/T 13615-2009 Earth station electromagnetic environmental protection requirements
3 Abbreviations
The following abbreviations apply to this document. CPI. Cross Polarization Isolation EIRP. Equivalent Isotropic Radiated Power (EffectiveIsotropicRadiatedPower) FSS. Fixed Satellite Service (FixedSateliteService) HPA. High Power Amplifier (HighPowerAmplifier) LNA. Low Noise Amplifier (LowNoiseAmplifier) PSD. Power Spectral Density (PowerSpectralDensity) SFD. Saturated Flux Density (SaturatedFluxDensity)
4 Test conditions
4.1 Test site
The test site includes the working site of the tested station, the site of the co-testing station and the site of the standard school tower. Each test site meets the following requirements.
a) The working site of the station under test should meet GB/T 13615-2009, its antenna pointing to the star should be unobstructed, and the pointing elevation angle should be higher than that of the working side.
The upward skyline elevation angle is 5° in C-band and 10° in Ku-band. If there is any unsatisfactory item, it should be clearly stated before the test. For indoor equipment The environment should meet the requirements of the working environment required by the equipment.
b) The co-testing station site should meet GB/T 13615-2009, and no harmful interference will enter the test within plus or minus 30° of the pointing direction deviation of the satellite The environment of the system, indoor equipment and test instruments should meet the required working environment requirements.
c) When using the standard tower method for the verification test of the earth station antenna access to the network, its antenna has no obstruction to the line-of-sight of the standard tower.
The distance between the antenna of the station under test and the calibration tower should meet the requirements of formula (1). L >= 2× D2 d2() (1)
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 18 pages — is available in the English PDF.
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