GB 13614-2012Electromagnetic environment requirements for short-wave radio receiving and direction finding stations (English PDF)

Foreword

All the technical contents of this standard is mandatory. This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard replaces GB 13614-1992 "shortwave radio direction finding station (station) Electromagnetic environment requirements" and GB 13617-1992 "no shortwave Radio receiving station (station) Electromagnetic environment requirements. " This standard and GB 13614-1992 and GB 13617-1992 compared to the main technical differences are.

--- Protection of formula pitch high voltage overhead power transmission lines were corrected;

--- The protection of the pitch, shortwave transmitters were harmonized. The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China. The standard by the China Communications Standards Association. This standard was drafted. the Ministry of Industry and Information Technology and Telecommunications Research Institute, State Radio Monitoring Center. The main drafters of this standard. Guo Lin, Li, Xiao Gimli, Lubing Song. This standard replaces the previous standard published case.

--- GB 13614-1992;

--- GB 13617-1992. Shortwave radio receiving station (station) and DF station (station) Electromagnetic environment requirements

1 Scope

GB 13614 protects the sites where short-wave signals are received and where their direction is found - two functions that depend entirely on a quiet radio background and are ruined by interference a transmitting station would not even notice. The standard sets the electromagnetic environment requirements around those stations: the protection zones, the permitted field strength of other emitters, and the conditions to be verified before building nearby. It merges and replaces two 1992 documents, GB 13614-1992 and GB 13617-1992. Issued on 29 June 2012 by AQSIQ and SAC, in force since 1 April 2013. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the edition it replaces are taken from there. The clause text, the tables and the numeric limits are not reproduced on this page - they are in the document itself, which is delivered in full in English translation.

This standard specifies the shortwave radio receiving station (station) and radio direction finding station (station) electromagnetic environmental requirements, and clearly the short-wave radio Receiving station (station) and radio direction finding station (station) radio transmitting and generating electromagnetic radiation interference protection requirements of the facility. This standard applies to the frequency of 1.5MHz ~ 30MHz fixed radio centralized receiving station (station) and the fixed radio direction finding station.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 7349-2002 high-voltage overhead transmission line and substation Methods of measurement of radio interference (IEC /CISPR18,1983, EQV)

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Protection spacing protectiondistance To protect the radio shortwave radio receiving station (station) work properly prescribed radiation and electromagnetic interference launch pad to receive shortwave radio The minimum distance to the station (station) antenna edge.

3.2 Radio direction finding station (station) radiodirectionfindingstation Determination of the use of radio technology radio transmitters and other facilities where the direction of the radiation source.

3.3 Sources of radio interference radiointerferencesource Radio direction finding various external electromagnetic interference radiation.

3.4 Obstacle obstacle In the vicinity of radio direction finding antenna can radiate again, scattering, reflection or diffraction of electromagnetic waves affect the accuracy of the measurement object. 4 shortwave radio receiving station (station) protection rating

4.1 Overview This standard is protected by shortwave radio receiving station (station), according to their administrative subordination, nature of business, communication distance and equipment functions, divided into the At three levels. a shortwave radio receiving station (station) (hereinafter referred to as a station (station)), two shortwave radio receiving station (station) (hereinafter referred to as two Level station (station)) and three shortwave radio receiving station (station) (hereinafter referred to three stations (station)).

4.2 a station (station) A station (station) comprising. - Central, directly under the State Council ministries, commissions, bureaus and above the corps level People's Liberation Army (excluding military) units of communication, monitoring and surveillance services Sector receiving station (station). - defense, public security and national security and maritime security at stake, and has a large building facilities or underground fortifications and trenches, and with Large-scale antenna site, a large high-gain antenna receiving station (station). - communication object other than the Asian country, territory or ocean-going fleet receiving station (station).

Note. Although the meet the above criteria, but the station (station) site located between the city and the area receiving the transmission area receiving station (station), press the two stations (stations) protection.

4.3 two stations (stations) Two stations (stations) comprising. - provinces, autonomous regions, municipalities directly under the central receiving station (station), People's Liberation Army-level units directly under the receiving station (station). - towards Taiwan and other Asian countries seas communications (station). - aeronautical communications and distribution belong to radar stations, marine navigation station (station) shortwave radio receiving station (station). NOTE. meet the above conditions, but the receiver works only amplitude reported, according to three stations (stations) protection.

4.4 three stations (stations) Central, wagons owned bureau, provincial and municipal People's Liberation Army division-level units receiving station set (station). Such units (Station) should set up a regular antenna, regular room construction and assume more important communication tasks. 5 shortwave radio receiving station (station) on the launch pad protection requirements

5.1 pairs of long wave and medium wave transmitter station spacing protection Shortwave radio receiving station (station) for medium, and long distance launch pad protection are shown in Table 1. Table 1 shortwave radio receiving station (station) for medium, and long distance launch pad protection Transmitter power kW Protection spacing/km A station (station) two stations (stations) three stations (stations) < 1001073 100 ~ 20015105 > 20,020,127

Note. The value of the guard in the middle of the pitch range, power and protection should be a linear relationship to determine the pitch.

5.2 Protection of spacing on shortwave station Shortwave radio receiving station (station) the protection of the shortwave station spacing shown in Table 2. Table 2 shortwave radio receiving station (station) distance protection for shortwave station Transmitter power kW Protection spacing/km A station (station) two stations (stations) three stations (stations) 0.5 542 1.5 5 ~ ~ 254 ~ 102 6 1.5 ~

3.0 TABLE 2 (cont.) Transmitter power kW Protection spacing/km A station (station) two stations (stations) three stations (stations) 25 ~ 12 010 ~ 10 206 ~ 3.0 ~ 5.0 > 120 > 20 > 10 >

Appendix A

(Informative) Recommended protection calculated pitch A.1 passive obstacle

--- vertical ground conductor spacing calculated protection The vertical distance between the ground conductor finding station (station) to the measured distance between the antenna must be greater than 60 times the height of the vertical grounding conductor, namely. D>=60la (A.1) Where. la

--- vertical grounding conductor height in meters (m); D

--- vertical distance between the ground conductor and direction finding antenna, in meters (m). When multiple vertical ground conductors arranged in rows, according to Table A.1 given increased protection spacing. Table A.1 trip type vertical grounding conductor spacing fold increase protection table S (pole pitch)/la (high bar) than a single vertical grounding conductor requirement increases in multiples 5 ~ 10 ~ 2.3 1.8 15 1.8 ~ 1.4 10 ~ 20 1.4 ~ 1.1 15 ~ > 201

Note. multiple values in Table A.1 in the middle range, and should be a multiple of (pole distance/bar high) linear relationship determination. A.2 Calculation of high voltage overhead transmission line protection pitch A.2.1 high voltage overhead power line pole calculation pitch protection High-voltage overhead transmission line poles as a passive obstacle

--- vertical grounding conductor, on shortwave radio direction finding station (station), the meter Calculation method, see A.1. A.2.2 high-voltage overhead transmission lines protection distance calculation method High-voltage overhead transmission lines as an active source of radio interference, its distance protection is calculated as follows: Using control background noise calculation method, namely by allowing the background noise level to calculate the incremental distance protection, the use of SNR Calculation Method France See GB/T 7349. Dp = 10k (A.2) among them. k = E0 DeltaEd DeltaEW DeltaEf-N0-10lg (100.1deltan-1) 20 0.85 (A.3) Where. Dp

--- high-voltage overhead power line interference on shortwave radio (station) protective distance in meters (m); E0

--- high-voltage overhead transmission lines of radio interference reference level, referring to high voltage overhead power line from the edge of the ground phase conductor projection at 20m 0.5MHz radio interference level in units of dB (µV/m); DeltaEd

--- distance correction value, in dB, can use the following formula. When the distance Dp < 100m, DeltaEd = -20Klg (Dp/20) (A.4) When > 100m distance Dp, DeltaEd = -13.98K-20lg (Dp/100) (A.5) Where. K

--- attenuation coefficients, and 0.15MHz ~ 0.40MHz, K = 1.80; 0.40MHz ~ 30MHz, K = 1.65; DeltaEw

--- rain incremental radio interference, taking 15dB; DeltaEf

--- frequency correction value, in dB, can use the following formula. DeltaEf = 5 [1-2 (lgf) 2] (A.6) f is the frequency in MHz. N0

--- station (station) local background noise level of 90% (N0 value measured or calculated using the method of determining the frequency of 1.5MHz, Preferably 12dB (µV/m)); deltan

--- incremental allow background noise, in dB. All levels of station (station) allows increments as shown in Table A.2. Delta list background noise levels in Table A.2 station (station) allowed Station (station) to allow background noise level increment/dB A station (station)