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本標(biāo)準(zhǔn)規(guī)定了由內(nèi)燃機(jī)、電動(dòng)機(jī)或二者推動(dòng)的車輛、機(jī)動(dòng)車輛、機(jī)動(dòng)船或者有火花點(diǎn)火內(nèi)燃機(jī)裝置的干擾引起移動(dòng)通信性能降級(jí)的評(píng)定方法。 本標(biāo)準(zhǔn)適用于工作頻率為25MHz~2GHz的移動(dòng)的接收機(jī)設(shè)備和系統(tǒng)。 本標(biāo)準(zhǔn)提供了主觀和客觀評(píng)定方法,將用它去評(píng)定各種移動(dòng)通信接收設(shè)備抗脈沖噪聲技術(shù)性能。 車輛包括各種汽車、摩托車、拖拉機(jī)及摩托雪橇等;機(jī)動(dòng)船也認(rèn)為是車輛的一種。 裝置包括鏈?zhǔn)戒彙⒐喔缺?、空壓機(jī)、割草機(jī)、固定式和移動(dòng)式混凝土攪拌機(jī)。 本標(biāo)準(zhǔn)不適用于飛機(jī)、鐵路上牽引系統(tǒng)引起的干擾。
本標(biāo)準(zhǔn)規(guī)定了HFC網(wǎng)絡(luò)設(shè)備管理系統(tǒng)的構(gòu)成與總體技術(shù)要求,描述了管理設(shè)備間的接口及協(xié)議、定義了HFC網(wǎng)絡(luò)設(shè)備管理系統(tǒng)管理信息庫(kù)集的結(jié)構(gòu)與對(duì)象。 本標(biāo)準(zhǔn)適用于HFC網(wǎng)絡(luò)設(shè)備管理系統(tǒng)中管理設(shè)備與管理軟件的生產(chǎn)、檢測(cè)及運(yùn)行維護(hù)。
本標(biāo)準(zhǔn)規(guī)定了同步數(shù)字體系系統(tǒng)和設(shè)備光接口的配置、光接口分類和應(yīng)用代碼、光接口參數(shù)的定義和要求、光接口參數(shù)值。本標(biāo)準(zhǔn)適用于同步數(shù)字體系的傳輸系統(tǒng)和設(shè)備,也可應(yīng)用于采用同步數(shù)字體系光接口的光傳送網(wǎng)系統(tǒng)和設(shè)備。
GB/T 31843的本部分規(guī)定了通過(guò)相應(yīng)接口互連的海上電子儀器與導(dǎo)航和無(wú)線電通信設(shè)備之間的數(shù)據(jù)通信要求。本部分旨在支持從一個(gè)單發(fā)話器到一個(gè)或多個(gè)受話器的單向串行數(shù)據(jù)傳輸。數(shù)據(jù)可以以ASCII形式輸出,也可以包含任何規(guī)定的語(yǔ)句信息或根據(jù)專有語(yǔ)句的規(guī)則進(jìn)行編碼的信息。典型信息的長(zhǎng)度可以從11字符到79字符,并且通常要求重復(fù)速率達(dá)到每20 ms一次。本部分對(duì)電氣的定義是為了適應(yīng)比IEC 61162-1中規(guī)定更高的速率。由于只有有限的錯(cuò)誤檢查功能,無(wú)法對(duì)消息傳遞提供保證,本部分在所有安全應(yīng)用程序中宜謹(jǐn)慎使用。附錄A包含了一系列適用于本部分的相關(guān)海事組織(IMO)決議和電信聯(lián)盟(ITU)建議書。
1.0.1為規(guī)范電子工程建設(shè)的基本術(shù)語(yǔ)及其定義,實(shí)現(xiàn)術(shù)語(yǔ)標(biāo)準(zhǔn)化,制定本標(biāo)準(zhǔn)。1.0.2本標(biāo)準(zhǔn)適用于電子工程建設(shè)的規(guī)劃、咨詢、設(shè)計(jì)、工程監(jiān)理、工程管理等工程服務(wù)以及教學(xué)、科研及其他相關(guān)領(lǐng)域。1.0.3電子工程建設(shè)文件、圖紙、科技文獻(xiàn)使用的術(shù)語(yǔ),除應(yīng)符合本標(biāo)準(zhǔn)外,尚應(yīng)符合現(xiàn)行有關(guān)標(biāo)準(zhǔn)的規(guī)定。
本標(biāo)準(zhǔn)規(guī)定了森林防火通信系統(tǒng)建設(shè)項(xiàng)目中VSAT(甚小口徑衛(wèi)星終端站)衛(wèi)星通信系統(tǒng)(高于1 Mbps)總體技術(shù)要求。本標(biāo)準(zhǔn)適用于森林防火通信系統(tǒng)中VSAT衛(wèi)星通信系統(tǒng)建設(shè)時(shí)的設(shè)計(jì)、設(shè)備選型和技術(shù)指標(biāo)選擇。
本標(biāo)準(zhǔn)適用于水利水電工程地質(zhì)勘察期間的地下水、邊坡變形、采空區(qū)地面沉降、斷裂活動(dòng)性的觀測(cè)和水庫(kù)誘發(fā)地震的監(jiān)測(cè)工作。
本標(biāo)準(zhǔn)規(guī)定了核電工程測(cè)量各級(jí)基準(zhǔn)網(wǎng)的布設(shè)原則、技術(shù)規(guī)格、作業(yè)方法、成果整理提交、各級(jí)網(wǎng)維護(hù)、儀器使用管理等內(nèi)容。本標(biāo)準(zhǔn)適用于核電站建設(shè)工程測(cè)量基準(zhǔn)網(wǎng)建立的技術(shù)設(shè)計(jì)、作業(yè),檢查與驗(yàn)收等活動(dòng)。
本標(biāo)準(zhǔn)適用于9953 280kbit/s速率的SDH光纜傳輸系統(tǒng)的終端設(shè)備。規(guī)定了在我國(guó)公用電信網(wǎng)中使用STM-64光線路終端設(shè)備的主要技術(shù)要求。專用電信網(wǎng)中的類似設(shè)備亦可參照本標(biāo)準(zhǔn)。
本標(biāo)準(zhǔn)規(guī)定了對(duì)超出安全光功率限制的光接口所采取的自動(dòng)光功率減少(APR)進(jìn)程提供橫向兼容性,即允許不同廠商的設(shè)備在同一光學(xué)子系統(tǒng)中混合組網(wǎng)。光接入網(wǎng)方面的光功率安全處理進(jìn)程不在本標(biāo)準(zhǔn)范圍之內(nèi)。帶RAMAN光放大器的光安全具體進(jìn)程待研究。本標(biāo)準(zhǔn)適用于采用光放大器的光傳送網(wǎng)系統(tǒng)。
本標(biāo)準(zhǔn)規(guī)定了800MHz/2GHz cdma2000數(shù)字蜂窩移動(dòng)通信網(wǎng)高速分組數(shù)據(jù)(HRPD)(第二階段)接入終端的功能、各層性能、環(huán)境適應(yīng)性、壽命、電源和充電器、外觀包裝及裝配等方面的測(cè)試方法。本標(biāo)準(zhǔn)適用于支持UIM卡(機(jī)卡分離)及不支持UIM卡(機(jī)卡一體)的800MHz/2GHz cdma2000 HRPD(第二階段)接入終端,對(duì)于支持UIM卡的800MHz/2GHz cdma2000 HRPD (第二階段)接入終端,本標(biāo)準(zhǔn)所有項(xiàng)目均適用,對(duì)于不支持UIM卡的800MHz/2GHz cdma2000 HRPD (第二階段)接入終端,本標(biāo)準(zhǔn)涉及到UIM卡及UIM卡接口測(cè)試的項(xiàng)目不適用。
本規(guī)范適用于SDH光傳輸系統(tǒng)工程設(shè)計(jì)。在執(zhí)行本規(guī)范與有關(guān)標(biāo)準(zhǔn)和規(guī)范有矛盾時(shí),應(yīng)以標(biāo)準(zhǔn)和規(guī)范為準(zhǔn)。
Specifies the minimum performance standards, methods of testing and required test results for GPS shipborne receiver equipment, based on the relevant IMO Resolution, which uses the signals from the United States of America, Department of Defence (US DOD), Global Positioning System (GPS) in order to determine position.
This part of IEC 61108 specifies the minimum performance standards, methods of testing andrequired test results for Galileo shipborne receiver equipment, based on IMO resolutionMSC.233(82), which uses the signals from the Galileo Global Navigation Satellite System inorder to determine position. It takes account of the general requirements given in IMOresolution A.694(17) and is associated with IEC 60945. When a requirement in this standardis different from IEC 60945, the requirement in this standard takes precedence. It also takesaccount, as appropriate, of requirements for the presentation of navigation-related informationon shipborne navigational displays given in IMO resolution MSC.191(79) and is associatedwith IEC 62288.A description of the Galileo Open Service and Safety of Life Service is given in the Galileointerface control documents (see Bibliography). This receiver standard applies to navigation inocean waters for the open service and harbour entrances, harbour approaches and coastalwaters for the Safety of Life service, as defined in IMO resolution A.953(23).All text of this standard, whose meaning is identical to that in IMO resolution MSC.233(82), isprinted in italics and the resolution and paragraph numbers are indicated in brackets i.e.(M.233/A1.2).The requirements in Clause 4 are cross-referenced to the tests in Clause 5 and vice versa.
This part of IEC 61108 specifies the minimum performance requirements, methods of testing and required test results for the Indian regional navigation satellite system (IRNSS), also known as Navigation with Indian Constellation (NavIC), shipborne receiver equipment, based on IMO resolution MSC.449(99), which uses the signals from NavIC/IRNSS in order to determine position. This document takes account of the general requirements given in IMO resolution A.694(17) and is associated with IEC 60945. When a requirement in this document is different from IEC 60945, the requirement in this document takes precedence. This document also takes into account, as appropriate, requirements for the presentation of navigation-related information on shipborne navigational displays given in IMO resolution MSC.191(79) and is associated with IEC 62288. This document further takes into account, as appropriate, requirements for bridge alert management given in IMO resolution MSC.302(87) and is associated wit
The ITU Radiocommunication Assembly considering that HDTV is defined as one of the picture formats in DTV standards; that compression technology is widely used and provides adequate picture quality in SDTV and HDTV applications not only for secondary distribution to the home but also for broadcasting studio equipment; that devices for HDTV signal compression have been developed by several integrated circuit manufacturers and are available economically in the market; that compression technology makes it possible to produce digital HDTV tape cassette recorders not only for studio production applications but also for field acquisition applications.
Countries around the world are in the process of migrating from analogue to digital broadcasting techniques for both television and radio. This Report looks at sound broadcasting in the bands below 30 MHz. It briefly examines the underlying reasons for the migration and looks at the technologies involved. Its focus is the DRM system as developed for use in the LF, MF and HF bands. The Report is intended to: 1) Explain why and how a broadcaster might go digital. 2) Be a reference technical document for DRM planning. 3) Provide new information based on the practical experience in DRM. 英:planning parameters;coverage;digital radio mondiale;broadcasting;frequency
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