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无线电设备与服务检测项目报价? 解决方案? 检测周期? 样品要求? |
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本标准规定了我国职业的分类结构、类别、代码及说明。本标准适用于按职业分类的各种普查、调查统计及行政管理和国内外信息交流等。
GB/T 30269的本部分规定了470 MHz~510 MHz频段高可靠性无线传感器网络的物理层和媒体访问控制层技术规范。本部分适用于短距离智能无线抄表、智能家居控制等应用。
GB/T 30287的本部分规定了卫星定位船舶信息服务系统(以下简称系统)的体系结构和功能描述。本部分适用于通过卫星定位技术、采用公众移动通信网络或专用移动通信网络、具有船舶信息服务中心的信息系统,可作为系统设计依据。通过非卫星定位技术、具有船舶信息服务中心的信息系统亦可参照执行。
本标准规定了采用码扩正交频分多址(CS-OFDMA)工作方式的SCDMA宽带无线接入系统的技术要求,包括:系统参考模型;工作频段、接口、功能、业务等技术要求;基站、业务汇聚网关等设备或模块的功能、性能指标;电源、环境适应性和电磁兼容等要求;以及操作维护要求。 本标准适用于采用码扩正交频分多址工作方式、工作频段符合无线电管理机构规定的SCDMA宽带无线接入系统的网络设备。
本部分规定了家庭能源网关的功能要求、电气性能、通信性能、电磁兼容要求、机械性能、适应环境、可靠性要求、检验规则。本部分适用于家庭能源网关的研发、生产、使用和检验。
that HF sky-wave links allow communication over large distances
The ionospheric channel provides the connectivity for the links in an adaptive HF radio circuit or network. To provide proper utilization of this resource the radio system must operate on the ideal frequency or as close to it as practical. This may be the
The passive radio astronomy service (RAS) is studying natural phenomena producing radio emissions at frequencies fixed by the laws of nature. Primary allocations have been made to various space services in the Earth-to-space direction such as the fixed-satellite service (FSS), radionavigation-satellite service (RNSS), mobile-satellite service (MSS) and broadcasting-satellite service (BSS) in bands adjacent or nearby to bands allocated to the RAS.
This Report provides information on the current status of terrestrial electronic news gathering (ENG), television outside broadcast (TVOB) and electronic field production (EFP) systems.
The purpose of the Report is to define the public protection and disaster relief (PPDR) objectivesand requirements for the implementation of future advanced solutions to satisfy the operationalneeds of PPDR organizations around the year 2010. Specifically, it identifies objectives, applications, requirements, a methodology for spectrum calculations, spectrum requirements and solutionsfor interoperability
considering that the Radiocommunication (ITU-R) Study Groups are charged to focus on the following in the study of Questions assigned to them
This Recommendation associates the published core network standards from standards development organizations (SDOs) with those 3GPP2 specifications that were approved as of 17 July 2001 for the IMT-2000 family member \"ANSI-41 evolved Core Network with cdm
This Recommendation associates the published core network standards fi-om the regional standards development organizations (SDOs) with those 3GPP2 specifications that were approved as of 11 July 2002 for the IMT-2000 family member \"ANSI-41 evolved core ne
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