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室内卫星广播接受设备检测项目报价? 解决方案? 检测周期? 样品要求? |
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本标准所列名词术语适用于电信各的生产、设计、施工、维护、管理、科研、教学、出版及援外等方面。
GB/T 5464的本部分规定了电气设备用图形符号及其名称、含义和应用范围。本部分的图形符号适用于以下用途:——标识设备或其组成部分(如控制器或显示器);——指示功能状态或功能(如开、关、告警);——标示连接(如端子、接头);——提供包装信息(如包装物的标识、装卸说明);——提供设备的操作说明(如使用限制)。本部分的图形符号不适用于以下用途。——安全标记;——公共信息;——图样的简图;——产品技术文件。
本标准规定了广播电视的主要术语和定义。本标准适用于广播电视系统。
本标准叙述了符合ITU-R(CCIR)规定的地面广播电视标准的电视广播接收机(以下简称电视机)的标准测量条件和测量方法。适用于本标准的电视机,可以是用于直接接收无线广播电视的电视机,也可以是经电缆网络接收的电视机,或可作为录像机的放像、家用音像设备和游戏机的监视器。本标准不包括专用于音频通道的测量。有关音频通道的测量方法在IEC107-2,IEC107-3,IEC107-4和IEC107-5中叙述;有关非标准广播信号条件下的测量方法,在IEC107-6中叙述。 本标准叙述了电视机性能的测量,并列出了对这些性能有用的特性及对这些特性统一的测量方法,以便对电视机进行统一的比较。但没有规定性能要求。 本标准没有叙述一般安全要求,该部分按照IEC 65号公告或其他IEC安全标准执行。同时也没有叙述干扰和抗扰度的要求,这些要求按照CISPR 13和20号公告执行。
本标准适用于新建、扩建和改建的住宅、办公、旅馆、文化、博物馆、观演、会展、教育、金融、交通、医疗、体育、商店等民用建筑及通用工业建筑的智能化系统工程设计,以及多功能组合的综合体建筑智能化系统工程设计。
为加强智能建筑工程质量管理,规范智能建筑工程质量验收,规定智能建筑工程质量检测和验收的组织程序和合格评定标准,保证智能建筑工程质量,制定本规范。 本规范适用于新建、扩建和改建工程中的智能建筑工程的质量验收。 智能建筑工程的质量验收除应符合本规范外,尚应符合现行有关标准的规定。
本标准规定了广播电视发射台(以下简称发射台)的运行维护任务和实施规程。本标准适用于县及县以上广播电视行政部门所辖的发射台。县以下发射台的运行维护参照本标准的规定执行。各发射台应根据本标准的规定,结合本台实际情况制定实施细则。
本标准所列的名词术语适用于广播接收设备的科研、生产。 本标准收词范围以广播接收为主体,适当地收编了与广播接收密切相关的电缆分配系统,广播接收天线和有关测量的术语。 本标准中各名词术语的文字说明,是为了尽可能准确地解释表达该词条的内容和涵义,以利于统一它们的技术概念。
本标准规定了农村VSAT卫星通信的频段、网络结构、业务范围、网管功能、制式、接口、系统和设备的技术指标、可用性、编号计划、计费、同步方式、电源、接地和防雷等技术要求。 本标准适用于静止卫星轨道(GSO)卫星固定业务。适应于国内波束通信卫星和租用卫星转发器或点波束组成的国内卫星通信系统。
There is an increasing interest worldwide for digital sound broadcasting to vehicular, portable and fixed receivers in the broadcasting-satellite service (BSS) (sound) bands allocated at the World Administrative Radio Conference for Dealing with Frequency Allocations in Certain Parts of the Spectrum (Malaga-Torremolinos, 1992) (WARC-92), and that several satellite-based digital sound broadcasting services for national and supra-national coverage are being considered. Developed for both satellite and terrestrial broadcasting applications in order to allow a common low-cost receiver to be used. Digital System B, originally proposed by Voice of AmericdJet Propulsion Laboratory (VONJPL), was designed to provide maximum efficiency on board a communications satellite. Digital System Ds, also known as the Worldspace system, is primarily designed to provide satellite digital audio and data broadcasting for fixed and portable reception. Digital System DH, also known as the hybrid satellite terrestrial Worldspace system, is designed to provide satellite digital audio and data broadcasting for vehicular, fixed and portable reception by inexpensive common receivers. Digital System E, also known as the ARIB (Association of Radio Industries and Businesses) system, is designed to provide satellite and complementary terrestrial on-channel repeater services for high-quality audio and multimedia data for vehicular, portable and fixed reception.
This Recommendation provides five levels of different architecture for the integration of mobilesatelliteservice (MSS) systems with terrestrial public switched telephone network (PSTN) or cellular network. Annex 1 addresses the concepts of such an archi
Consideration of potential for interference between IMT-2000 and systems beyond IMT-2000 and other services is essential for administrations in planning the use of frequency bands where the mobile service exists on a co-primary basis with other services o
This Report provides information on the current status of terrestrial electronic news gathering (ENG), television outside broadcast (TVOB) and electronic field production (EFP) systems.
This Report gives the protection requirements for terrestrial broadcasting services in the 620-790 MHz band against potential interference from broadcasting BSS (GSO, non-GSO) satellite systems.
This Report provides a summary of the market analysis and forecast of the future market, as well as detailed data on the traffic forecasts, based on internal and external studies to the year 2010– 2020 as well as detailed data on the traffic forecasts in different parts of the world. It also provides examples of potential services and applicationsof future development of IMT-2000 and systems beyond IMT-2000 from the year 2010 onwards.
There is a risk of co-channel and adjacent channel interference between IMT-2000 systems and other systems in the band, for example, Broadband Wireless Access Systems such as MMDS or IEEE 802.16. This Report addresses coexistence between the following: ? 802.16 TDD, which is based on the IEEE 802.16 series of standards, and IMT-2000 CDMA-DS,? 802.16 TDD, and IMT-2000 CDMA-TDD,? MMDS and CDMA-DS,?MMDS and CDMA-TDD. Mobile application of IEEE 802.16 is out of the scope of this study.
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