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YD/T 3089-2016 通信用336V直流供电系统 336V Direct current power supply system for telecommunication
本标准规定了通信用336V直流供电系统(以下简称“系统”)的组成、系列、技术要求、试验方法、检验规则、标志、包装、运输和储存。<br />本标准适用于通信局站和数据机房中向通信设备供电,标称电压为336V的直流供电系统。...
2023-12-13 07:36:02浏览:6
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YD/T 3176.1-2016 800MHz/2GHz cdma2000数字蜂窝移动通信网(第二阶段)设备测试方法 移动台 第1部分:基本无线指标、功能和性能 Test method of mobile station for 800MHz/2GHz cdma2000 digital cellular mobile telecommunication network(Phase II) Part 1: Minimum standard, function and performance
本部分规定了800MHz/2GHzcdma2000数字蜂窝移动通信网(第二阶段)移动台的功能、射频指标、 音频性能、环境适应性等方面的测试方法。<br />本部分适用于支持UIM或CSIM卡(机卡分离)及不支持UIM及CSIM卡(机卡一体)的800MHzJ2GHz cdma2000(第二阶段)移动台;对于支持UIM或CSIM卡的800MHz/2GHzcdma2000(第二阶段)移动台,本部分所有项目均适用;对于不支持UIM及CSIM卡的800MHz/2GHzcdma2000(第二阶段)移动台,本部分涉及到UIM及CSIM卡及UIM及CSIM卡接口测试的项目不适用。...
2023-12-06 08:00:01浏览:7
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YD/T 2583.17-2019 蜂窝式移动通信设备电磁兼容性能要求和测量方法 第17部分:5G基站及其辅助设备 Requirement and measurement methods of electromagnetic compatibility for mobile telecommunications equipment Part 17: 5G base station and ancillary equipment
本标准规定了5G数字移动通信系统基站设备、辅助射频放大器、中继器及其辅助设备的电磁兼容性要求及测量方法。<br />本标准适用5G数字移动通信系统的固定或移动基站无线设备、辅助射频放大器、中继器及其相应的辅助设备。...
2023-11-26 01:12:01浏览:10
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ISO/IEC/IEEE 8802-15-4-2018 信息技术--系统之间的电信和信息交换--本地和都市地区网络--具体要求--第15-4部分:无线介质访问控制(MAC)和物理层(PHY)规范、用于低速率无线个人区域网络(WPANs) Information technology — Telecommunications and information exchange between systems — Local and metropolitan area networks
This standard defines the physical layer (PHY) and medium access control (MAC) sublayer specifications for low-data-rate wireless connectivity with fixed, portable, and moving devices with no battery or very limited battery consumption requirements. In addition, the standard provides modes that allow for precision ranging. PHYs are defined for devices operating various license-free bands in a variety of geographic regions....
2023-11-18 07:00:02浏览:15
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YD/T 2435.4-2020 通信电源和机房环境节能技术指南 第4部分:空调能效分级 Guide for energy saving technology of power supply and room environment for telecommunications-Part 4: Classification of airconditioners energy efficiency
本部分规定了通信用空调设备的能效分级原则、能效比限值、能效等级指标、试验方法、检验规则、能效等级标志等。<br />本部分适用于通信用空调设备。...
2023-11-15 09:36:02浏览:8
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YD/T 3421.3-2021 基于公用电信网的宽带客户智能网关 第3部分:网关管理平台技术要求 Broadband customer intelligent gateway based on public telecommunication network-Part 3 : Technical requirements of gateway management platform
本部分规定了基于公用电信网的宽带客户智能网关管理平台的架构、功能和性能等方面的要求。<br />本部分适用于基于公用电信网的宽带客户智能网关的终端和插件管理,宽带客户网关也可参考使用。...
2023-11-15 08:24:01浏览:9
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YD/T 2855.5-2015 2GHz TD-SCDMA数字蜂窝移动通信网 多载波高速分组接入 Uu接口物理层技术要求 第5部分:物理层过程 2GHz TD-SCDMA digital cellular mobile telecommunication network Multicarrier HSPA Uu Physical layer technical requirements Part 5:Physical layer procedure
本部分规定了2GHz TD-SCDMA数字蜂窝移动通信网多载波高速分组接入Uu接口的物理层过程。在HSPA+的Uu接口的物理层过程的基础上,添加了多载波HSPA相关的物理层过程的描述。<br />本部分适用于2GHz TD-SCDMA数字蜂窝移动通信网多载波高速分组接入Uu接口物理层。...
2023-11-11 02:48:01浏览:9
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YD/T 3420.3-2020 基于公用电信网的宽带客户网关虚拟化 第3部分:实体家庭网关技术要求 Virtualization of broadband customer gatewaybased on public telecommunication network- Part 3: Technical requirements for physical residential gateway
本部分规定了宽带客户网关虚拟化后的实体家庭网关部分的网络定位、接口要求、功能要求、性能要求及管理功能的要求。<br />本部分适用于公众电信网环境下,宽带客户网关虚拟化后的实体家庭网关设备,专用电信网可参考使用。...
2023-10-30 14:00:01浏览:14
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YD/T 3672-2020 TD-LTE数字蜂窝移动通信网家庭基站总体技术要求 TD-LTE digital cellular mobile telecommunication network Home eNodeB system general technical requirement
本标准规定了TD-LTE数字蜂窝移动通信网家庭基站的总体技术要求,包括系统架构、系统接口、频率计划、同步和传输技术要求、网络管理、接入管理及安全技术要求等。<br />本标准适用于TD-LTE数字蜂窝移动通信网家庭基站的基站设备、安全网关、信令网关以及网管系统。...
2023-10-21 10:00:01浏览:8
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ITU-T X.1080.1-2018 e-Health and world-wide telemedicines–Generic telecommunication protocol
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2023-10-20 12:00:01浏览:8
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YD/T 3432-2018 通信用偏振保持光纤特性 Characteristics of polarization-maintaining fibres for telecommunication
本标准规定了偏振保持光纤(D类单模光纤)的尺寸参数、传输特性、机械性能、环境性能的要求和测量方法。<br />本标准适用于光通信系统中使用的偏振保持光纤。...
2023-10-20 11:48:01浏览:18
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ISO 7779-2018 声学--信息技术设备和通信设备空气噪声的测量 Acoustics -- Measurement of airborne noise emitted by information technology and telecommunications equipment
This document specifies procedures for measuring and reporting the noise emission of information technology and telecommunications equipment.<br />NOTE 1 This document is considered part of a noise test code (see 3.1.2) for this type of equipment and is based on basic noise emission standards (see 3.1.1) ISO 3741, ISO 3744, ISO 3745, ISO 9295 and ISO 11201.<br />The basic emission quantity is the A-weighted sound power level, which can be used for comparing equipment of the same type but from different manufacturers, or for comparing different equipment.<br />Three basic noise emission standards for determination of the sound power levels are specified in this document in order to avoid undue restriction on existing facilities and experience. ISO 3741 specifies comparison measurements in a reverberation test room; ISO 3744 and ISO 3745 specify measurements in an essentially free field over a reflecting plane. Any of these three basic noise emission standards can be selected and used exclusively in accordance with this document when determining sound power levels of a machine.<br />The A-weighted sound power level is supplemented by the A-weighted emission sound pressure level determined at the operator position or the bystander positions, based on basic noise emission standard ISO 11201. This sound pressure level is not a level of noise immission at a work station (see 3.2.12), but it can assist in identifying any potential problems that could cause annoyance, activity interference or hearing damage to operators and bystanders.<br />Methods for determination of whether the noise emission includes prominent discrete tones are specified in Annex D.<br />This document is suitable for type tests and provides methods for manufacturers and testing laboratories to obtain comparable results.<br />The methods specified in this document allow the determination of noise emission levels for a functional unit (see 3.1.4) tested individually.<br />The procedures apply to equipment which emits broad-band noise, narrow-band noise and noise which contains discrete-frequency components, or impulsive noise.<br />The sound power and emission sound pressure levels obtained can serve noise emission declaration and comparison purposes (see ISO 9296 ).<br />NOTE 2 The sound power levels and emission sound pressure levels obtained are not intended to be considered <br />as installation noise immission levels; however, they can be used for installation planning (see ECMA TR/27 ).<br />If sound power levels obtained are determined for a number of functional units of the same production series, they can be used to determine a statistical value for that production series (see ISO 9296 )....
2023-10-17 15:48:01浏览:26
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