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GB 13615-2009 English PDF

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GB 13615-2009: [GB/T 13615-2009] Electromagnetic environment protection requirements for earth stations
Status: Valid

GB 13615: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 13615-2009	419	Add to Cart	4 days	[GB/T 13615-2009] Electromagnetic environment protection requirements for earth stations	Valid
GB 13615-1992	439	Add to Cart	4 days	Electromagnetic environment protection requirements for earth stations	Obsolete

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Basic data

Standard ID: GB 13615-2009 (GB13615-2009)
Description (Translated English): [GB/T 13615-2009] Electromagnetic environment protection requirements for earth stations
Sector / Industry: National Standard
Classification of Chinese Standard: M04
Classification of International Standard: 33.100
Word Count Estimation: 16,186
Date of Issue: 2009-05-05
Date of Implementation: 2010-07-01
Older Standard (superseded by this standard): GB 13615-1992
Regulation (derived from): Announcement of Newly Approved National Standards No. 6, 2009 (No. 146 overall)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Chinese standard specifies the electromagnetic environment of the Earth station interference allowed values, and interference level calculation. This standard specifies test methods earth station electromagnetic environment. This standard applies to working frequency of 1GHz ~ 40GHz synchronous satellite communication earth station, synchronous meteorological satellite earth stations and coast earth stations.

GB 13615-2009: [GB/T 13615-2009] Electromagnetic environment protection requirements for earth stations

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Electromagnetic environment protection requirements for earth stations ICS 33.100 M04 National Standards of People's Republic of China Replacing GB 13615-1992 Earth station electromagnetic environment protection requirements Posted 2009-05-05 2010-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms and definitions 4 1 source of interference 5 allows interference value 1 6 2 antenna front Clearance Requirements 7 3 Interference calculation methods Test Method 8 Earth station electromagnetic environment 3 9 Earth station site requirements and classification 3 Appendix A (normative) interference level calculation formula 4 Appendix B (normative) earth station electromagnetic environment testing methods 6 Annex C (informative) spectrum analyzer correction in low SNR reading of 8 Nearby Annex D (informative) earth station interference field strength and natural room shielding effect 9 Annex E (informative) Earth Stations in claim 10 Classification Annex F (informative) satellite communication earth station 11

Foreword

All the technical contents of this standard is mandatory. This standard replaces GB 13615-1992 "earth station electromagnetic environment protection requirements." This standard compared with GB 13615-1992 main changes are as follows. --- Modify and update the present standard of normative references; --- Revised technical requirements to allow interference values; --- Revised Appendix B, Appendix D and Appendix E; --- Added Appendix C. This standard is part of the relevant Recommendation ITU interference on synchronous satellite earth station and space station allows other networks Recommended value. This standard Annex A, Annex B is normative appendix, Appendix C, Appendix D, Annex E and Annex F is informative appendix. This standard by the National Standardization Technical Committee on Radio Interference (SAC/TC79) and focal points. This standard was drafted. SRMC. The main drafters of this standard. Tseng Fan sound, Cong Far East, Pan Ji, Wang Xiaodong, Li Jianxin. This standard replaces the standards previously issued as follows. --- GB 13615-1992. Earth station electromagnetic environment protection requirements

1 Scope

This standard specifies the earth station electromagnetic interference environment allowed values and interference level calculation methods. This standard specifies the earth station electromagnetic environment testing methods. This standard applies to working frequency of 1GHz ~ 40GHz synchronous satellite communication earth station, as well as synchronous meteorological satellite earth station to the coast Ball stand.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB 4824-2004 industrial, scientific and medical (ISM) radio-frequency equipment - Electromagnetic disturbance characteristics - Limits and methods of measurement (CISPR11. 2003, IDT) GB/T 6113.204 radio disturbance and immunity measuring apparatus and methods - Part 2-4. Radio disturbance and anti- Immunity measuring interference measurement method (GB/T 6113.204-2008, CISPR16-2-4.2003, IDT) GB/T 7615-1987 master antenna television system antenna section GB 50016-2006 architectural design code for fire protection

3 Terms and Definitions

The following terms and definitions apply to this standard. 3.1 Since one or more emission, radiation, induction or a combination thereof unwanted energy reception in a radio communication system to produce a shadow Sound, its performance is degraded, misunderstood, or loss of information, if the existence of such unwanted energy, the result of the above consequences can be avoided.

4 sources of interference

4.1 digital microwave radio relay system interference. 4.2 from all other network earth station and space station interference. 4.3 radar, radio, television, mobile communications and other radio transmitters of the same frequency, harmonics and spurious emission interference. 4.4 industrial, scientific and medical equipment, radiation interference.

5 allows interference value

5.1 Interference from the digital radio-relay system allows values When the earth station and digital radio-relay systems share the same frequency band, radio relay systems caused by the 8-bit PCM telephone Satellite Suppose the fixed service interference reference channel digital output terminal shall comply with the following possible values. a) 20% or more for any month period, any of 10min RF interference generated power should not exceed the equivalent of 1 × 10-6 average error ratio Bit rate demodulator input terminal 10% of the total noise power; b) more than 0.03% of any month period, any 1min RF interference caused by power shall not exceed the average bit error rate 1 × 10-4; c) within 0.005% of any month's time, the average bit error rate 1s any RF interference caused by power should not exceed 1 × 10-3. 5.2 interfering earth stations and geostationary satellites space station from all other networks allowable value In the following work on the same 15GHz band fixed-satellite service networks from all other networks earth stations and space station transmitters yield The total amount of interference generated interference into the 8-bit PCM telephone fixed-satellite service system shall comply with the following possible values. a) the network does not implement the band frequency reuse of more than 20% for any month period, the 10min average interference noise power Level should not exceed the equivalent of generating average bit error rate should not exceed 1 × 10-6 bit error rate of the demodulator input of the total noise power 25%; b) the implementation of the network band frequency reuse, more than 20% of any month of the time, 10min average interference noise power level does not It should produce more than the equivalent of the average bit error rate should not exceed 1 × 10-6 bit error rate of the demodulator input of the total noise power 20%; c) in any month more than 20% of the time, resulting in falls and any other by a transmitter 8 to the fixed-satellite service networks Especially PCM telephone systems 10min average maximum interference power level should not exceed the equivalent of 1 × 10-6 to generate bit error rate Demodulator input terminal 6% of the total noise power. 5.3 with radio transmitters from other business radar, radio, television, mobile communication, frequency, harmonics and spurious emission interference values When the earth station and other business systems share the same frequency band in the communication direction fixed-satellite service earth stations, allows any month dry Disturbing deterioration should not exceed the corresponding error performance index 10%, of which part of the amount of deterioration caused by interference from the fixed service shall not exceed 89%, the amount of deterioration in radar, radio, television, mobile communications, and other major businesses from common frequency caused by not more than 10% from its all He amount of deterioration due to interference sources should not exceed 1%. 5.4 interference from radar, radio, television and mobile communication system according to the allowable value 5.4.1 interference from radar systems fall into synchronous meteorological satellite earth station receiver input interference signal peak level should be higher than normal access Received signal level is low 10dB. 5.4.2 interference from radar systems fall coast earth station interfering signal at the receiver input signal level should peak level than normal reception Level low 10dB. 5.4.3 emission interference from AM, FM radio and television broadcast channels 1 to 5, the electric field strength in a satellite communication system earth station should not Greater than 125dB (μV/m). 5.4.4 Harmonic emission interference from television broadcasts, falling synchronous meteorological satellite earth station receiver input interference signal level should be higher than the positive Chang received signal level low 25dB. 5.4.5 emission interference from short-wave broadcasting, satellite communication systems in the electric field strength of the earth station should not exceed 105dB (μV/m). 5.4.6 harmonic emission of interference from the mobile communication system, falling synchronous meteorological satellite earth station interfering signal at the receiver input level should Lower than the normal reception signal 25dB. 5.5 radiated interference from industrial, scientific and medical equipment to allow values 5.5.1 300MHz frequency band from radiation interference less industrial, scientific and medical equipment, electric field strength in the earth station should be the implementation of national GB 4824-2004 standard requirements. 5.5.2 from the band for industrial, scientific and medical radiation interference device 1GHz ~ 18GHz, and fell to the Earth station at the receiver input Interference signal level should be lower than the normal received signal level 30dB.

6 front of the antenna Clearance Requirements

Earth station antenna directly in front of the terrain should be open, as shown in FIG. Front of the antenna requires clearance area should not have trees, chimneys, towers, building Buildings, metal reflector, overhead power lines, poles and other obstacles. The H --- antenna height, in units of m; D --- antenna diameter in m; θ --- tubular beam protection angle, the unit is (°).

1 antenna front Clearance Requirements

When working in C-band earth station antenna is available in the geostationary-satellite orbit arc and the skyline operational elevation angle of elevation angle (θ) is not It should be less than 5 °; when working in Ku-band earth station antenna is available in the geostationary-satellite orbit and operational elevation skyline arc segment elevation folder Angle (θ) of not less than 10 °.

7 Interference calculation methods

Interference calculation methods in Appendix A.

8 test method the electromagnetic environment of the earth station

Test Method earth station electromagnetic environment in Appendix B.

9 Earth station site requirements and classification

Earth station site requirements and classification, see Appendix C, Appendix D, Appendix E and Appendix F.

Appendix A

(Normative) Interference level calculation formula A. 1 converted to the level of interference parabolic antenna aperture shall be in accordance with the formula (A.1) is calculated. PR = Pin + Chou -G (φ) (A.1) Where. PR --- aperture antenna interference level in units of dBW; Pin --- earth station interference level at the receiver input, in units of dBW; Chou --- input to the amplifier between the antenna feeder loss, in units of dB; G (φ) --- antenna in the direction of interference by the gain of the unit is dBi. Earth station antenna patterns should be determined in accordance with the direction of the antenna gain of each measured directivity pattern. In the absence of actual directivity pattern, Large diameter antenna (diameter than the wavelength of not less than 100 when) the gain in the direction of interference according to equation (A.2) ~ (A.5) calculated as follows. G (φ) = Gmax-2.5 × 10- 3 D λ () φ 0 ° ≤φ < φm (A.2) G (φ) = G1 φm ≤φ < φr (A.3) G (φ) = 32-25lgφ φr≤φ < 48 ° (A.4) G (φ) = - 10 48 ° ≤φ≤180 ° (A.5) Where. G (φ) --- antenna in the direction of interference by the gain in units of dB; Gmax --- the main lobe antenna gain in units of dB; the deviation angle φ --- antenna main beam central axis, the unit is (°); D --- antenna diameter in m; G1 --- first side lobe antenna gain in dB. G1 = 2 + 15lgDλ (A.6) φm = 20λ D Gmax-G Sang 1 (A.7) φr = 15.85 D () λ -0.6 (A.8) If the ratio between the antenna diameter and the wavelength is less than 100 earth stations should also be measured using the actual antenna pattern. In the absence of measured data When the antenna gain in the direction of interference shall be in accordance with the formula (A.9) ~ (A.12) is calculated. G (φ) = Gmax-2.5 × 10- 3 D λ () φ 0 ° ≤φ < φm (A.9) G (φ) = G1 φm ≤φ < 100 (A.10) G (φ) = 52-10lg λ - 25lgφ 100 D ≤φ < 48 ° (A.11) G (φ) = 10-10lg 48 ° ≤φ≤180 ° (A.12) Where. G (φ) --- antenna in the direction of interference by the gain in units of dB; Gmax --- the main lobe antenna gain in units of dB; the deviation angle φ --- antenna main beam central axis, the unit is (°); D --- antenna diameter in m; λ --- operating wavelength, the unit is m; G1 --- first side lobe antenna gain in dB. G1 = 2 + 15lgDλ (A.13) φm = 20λ D Gmax-G Sang 1 (A.14)

Appendix B

(Normative) Earth station electromagnetic environment testing methods B. 1 testing purposes Determining the electric field strength of various types of interference signals falls into the frequency band of the receiving system, to identify the received RF signal interference in the system at the entrance Ratio, in order to determine the electromagnetic environment of the test site meets the requirements of the receiving earth station normal. B. 2 test system (recommended system) B. 2.1 test system shown in Figure B. 1 FIG. Figure B. Electromagnetic environmental test system block diagram B. 2.2 Test System Requirements a) test system consists of a spectrum analyzer, Antenna, low noise amplifier, power supply and attenuator may be used in other components; b) test instrumentation shall comply with GB/T 6113.204, and by the measurement test of the department to ensure accurate test data; c) the position of the antenna should be placed more than 1.5m from the ground; d) must be good performance cables, antennas, feeder lines, test equipment between the input voltage of the circuit between the antenna and test equipment VSWR should be less than 2.0; e) low noise amplifier and a spectrum analyzer connected to chassis ground should be well in advance; f) test equipment shall comply with GB/T 6113.204, sensitivity, the system can meet the test requirements; g) low noise amplifier and attenuator should meet the test frequency and sensitivity of the system requirements. B. Test Method 3 B. 3.1 The test method should comply with the following national standards. a) GB/T 7615-1987 in 2.3; b) GB 4824-2004. B. 3.2 According to predict the order of transmission power source of interference, as shown in Figure B. 1 test system is properly connected, press the instrument into the instrument Operating Instructions Line testing. B. 3.3 In accordance with the operating parameters of the earth stations, set various parameters of the test system (including test frequency, bandwidth, resolution bandwidth, etc.). B. 3.4 the earth station receives continuously scan the working frequency band, to observe whether the interference signal; azimuth around the earth station antenna, the anti Repeated measurements, focusing on observation; the source of interference position, repeatedly adjust the antenna azimuth and elevation adjustment of system parameters and test polarization Number, read out the maximum level of interference on the spectrum analyzer P. B. 3.5 When the test signal to noise ratio is low, you can refer to Appendix C of reading be amended. B. 3.6 Conversion antenna aperture at the level of the interference signal PR should be in accordance with the formula (B.1) is calculated. PR = P-Ga-GL + Chou (B.1) Where. PR --- antenna aperture of the interference signal level in units of dBW; P --- spectrum analyzer level readings in dBW; Ga --- test antenna gain, the unit is dBi; GL --- low noise amplifier gain in units of dB; Chou --- total loss feeder system (including feeders, adapters and attenuators), in units of dB. B. 4 in terms of space electric field strength and power flux density When the test space field strength is obtained field intensity [dB (V/m)] when, in accordance with the formula (B.2) in terms of the success rate of flux density [dB (W/m2)]. P = 20lgE-10lgZ (B.2) Where. P --- power flux density in dB (W/m2); E --- electric field strength, in units of V/m; Z --- free space wave impedance, 377Ω. When using a spectrum analyzer test spatial interference signal, the reading is generally dBm, in accordance with Equation (B.3) in terms of electric field strength dB (μV/m). E '= P + A + F (B.3) Where. E '--- electric field strength, in units of dB (μV/m); P --- spectrum analyzer readings in dBm; A --- antenna factor, in units of dB (1/m); F --- conversion coefficient, in dB. Spectrum analyzer input impedance of 50Ω, this conversion factor is 107dB; input impedance When 75Ω, the conversion factor of 109dB.

Appendix C

(Informative) Spectrum analyzer correction in low SNR readings Numerical display the signal level on the spectrum analyzer to the input signal level (S) and thermal noise (N) level superposition of values. When the input signal is low, especially when the input signal level and spectrum analyzer sensitivity insufficient balance 10dB, noise superimposed Spectrum analyzer readings will have a non-negligible error. Therefore, during the test, when the test case of low signal to noise ratio, it is necessary to Reading amendments. Determination of correction factor as follows. a) read spectrum analyzer signal level value (that is, the input signal and thermal noise and signals); b) reading out the signal and spectrum analyzer noise level difference (dB), and C. In FIG. 1 abscissa to find the corresponding position; The ordinate value is the correction coefficient point c) curves correspond; d) the real level of the input signal spectrum analyzer readings by subtracting the correction factor. Figure C. 1 correction factor curve

Appendix D

(Informative) Around the earth station interference field strength in environment and natural room shielding effect D. Natural shielding effect 1 satellite earth station equipment room MW system, television broadcast transmitter interference should be measured to prevail. D. Anti-interference ability AM broadcast transmission of microwave carrier equipment 2 satellite earth station system is 110dB (μV/m). According to part of the frame Natural Shielding Effectiveness Testing Statistical data structures room on medium wave broadcast transmitter interference was (10 ~ 20) dB. When the room is naturally shielding effectiveness When 15dB, satellite communication system around the earth station electromagnetic environment requires the AM broadcasting field strength should not exceed 125dB (μV/m). D. Microwave carrier equipment anti-3 satellite earth station system (1 to 5) the ability to transmit an interference-channel broadcasting is 120dB (μV/m). root According to the natural shielding effect of the test portion of the frame structure of the engine room (1 to 5) TV channel broadcast transmission interfe......

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Question 5: Should I purchase the latest version GB 13615-2009?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB 13615-2009 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.