GB-T13711-1992 国际海事卫星A船舶地球站技术要求

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1、UDC629-12-018.7:629-783U66携a中华人民共和国国家标准Gs/T13711-92国际海事卫星A船舶地球站技术要求TechnicalrequirementsforINMARSATAshipearthstations1992一10一04发布1993一06一01实施国家技术监督局发布目次11主题内容与适用范围.........................................................········.·..·..·..·..·.⋯⋯(，曰引用标准··········”·················

2、·····························..··········.·，·⋯”..⋯⋯(n口缩语和术语·····”··”············“················，··········”···················，，·········⋯⋯.(J践总要求·····“·”······················，.························································，⋯(匕J接收信号特性·······”···”···········，.·“·····“

3、·····，.···“···········”······‘··.········..⋯⋯(八匕发射信号特性·“····”············”··”·············，·，“···，.····”·······价········⋯⋯。.⋯’(行了天线系统要求··”··········，.···················”···························”···········⋯⋯(0卜接收系统要求·...........................................................

4、.....................................(0︺发射系统要求·······”··”·“··········””··················，.·”··············..·.“..·..·.⋯⋯(接续和控制”................................................................................................(附录AINMARSAT信令系统(补充件)(18)中华人民共和国国家标准国际海事卫星A船舶地球站技术要求GB/T

5、13711一92TechnicalrequirementsforINMARSATAshipearthstations本标准参照采用国际海事卫星组织(INMARSAT)(INMARSATA标准船舶地球站技术要求》。1主题内容与适用范困本标准规定了国际海事卫星A船舶地球站的接收和发送信号特性，天线、接收和发送系统技术要求，以及接续和控制方法.本标准适用于GIT值等于或大于一4dBK的国际海事卫星A船舶地球站的设计、制造和设备生产前的型号批准及启用申请.2引用标准GB2423电工电子产品基本环境试验规程3缩语和术语3.1缩语3.1.1TDMtimedivisi

6、onmultiplex，时分多路复用。3.1.2TDMAtimedivisionmultipleaccess，时分多址接续。3.1.3EIRPequivalentisotropicradiatedpower，等效全向辐射功率。供给天线的功率和给定方向上相对于全向天线的增益的乘积。3.1.4SFsinglefrequency，单频.3.1.5NRZnon-return-to-zero不归零。3.2术语3.2-1G/T用分贝表示的接收天线增益G与接收系统噪声温度T的比值。3.2.2dBmo折算到零参考电平点的绝对功率电平，用分贝表示，1mW为零分贝。12.3

7、dBi相对于全向性天线的天线增益，单位为分贝。3.2.4A船舶地球站国家技术监督局1992一10一04批准1993一06一01实施GB/T13711一92能进行电报和电话通信的G/T值等子或大于一4dBK,满足本标准要求的船舶地球站，称为国际海事卫星A船舶地球站。3.2.5第一类A船舶地球站能进行电报和电话通信的A船舶地球站，简称第一类A船站。3.2.6第二类A船舶地球站能进行电话通信，并能接收岸到船单向电报的A船舶地球站，简称第二类A船站。3.2.7第三类A船舶地球站仅能进行电报通信的A船舶地球站，简称第三类A船站。3.3C/N.载波功率和噪声功率谱密

8、度之比，简称载波和噪声密度比，单位为dBHzo总要求4.1整体功能4.1.1船站