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調頻模擬移動通信平臺檢測項目報價???解決方案???檢測周期???樣品要求? |
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本標準規定了移動通信調頻接收機(以下簡稱接收機)性能的定義、測量條件和測量方法。本標準適用于工作頻率為25 MHz~1 000 MHz,傳輸單路話音和其他類型信號,其音頻帶寬不超過10 kHz的移動通信調頻接收機。
本標準規定了9kHz~300GHz頻段內無線電發射設備的頻率容限、雜散域發射功率限值要求和通用測量方法,同時確定了不同無線電發射類別必要帶寬的計算公式。本標準適用于9kHz~300GHz頻段內的不同功率等級、不同類別的無線電發射設備。但不適用檢測營救器電臺或水上發射機等安全業務和特別業務的雜散域發射指標。
本標準適用于鐵路工程的規劃、勘察、設計、施工及驗收等。
本標準規定了公安移動通信網警用自動級(模擬集群)通信系統工程設計的技術要求。本標準適用于新建警用350 MHz集群通信工程。對于改建、擴建工程及其他頻段的專用超短波通信工程亦可參照執行。
本標準規定了高速公路緊急電話系統(以下簡稱緊急電話)的分類、結構與標志、使用環境條件、性能指標、功能、試驗方法、檢驗規則、包裝與標志、運輸及安裝驗收的要求。 本標準適用于高速公路(含一級汽車專用公路)緊急電話系統的設計、生產及使用。
本標準規定了移動通信所用的基本術語及其定義,包括移動通信業務、基本技術、移動通信系統及各類移動通信設備涉及的術語及定義等。 本標準適用于移動通信的科研、教學、設計、生產、使用和管理。
本標準規定了采用TDMA制的數字集群移動通倌系統的頻段、網絡結構、業務、空中接口、同步、安全性、編號、接口要求和設備的基本技術要求。 本標準適用于數字集群移動通信系統(包括專用網和共用網)的規劃、工程設計、使用及設備的開發、生產。
本規范適用于新建、擴建和改建的陸上凝析氣田地面工程、海上凝析氣田陸上終端工程。
本規程適用于新建、改建、擴建的供比賽和訓練用體育建筑的智能化系統工程的設計、施工和驗收。
本標準規定了鐵路數字移動通信系統(GSM-R)數字光纖直放站(以下簡稱GSM-R數字光纖直放站)的系統構成、系統功能、技術性能指標要求和檢驗方法。本標準適用于GSM-R數字光纖直放站的產品制造、質量檢驗和工程設計。
本部分規定了電網調度的詞匯。本部分適用于從事電力行業的工作人員、高等院校師生在對外交流、定貨、簽定合同、設備驗收和學術交流時,使用規范的中、英文名詞術語。
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 Recommendation describes methodologies and reference fixed system characteristics forimplementation of the System Specific Methodology (SSM) of Appendix 5 of the Radio Regulations (RR),which allows a detailed assessment of the need to coordinate frequency assignments for non-geostationary(non-GSO) space stations (space-to-Earth) and receiving systems in the fixed service (FS). TheRecommendation also describes a possible methodology for use in bilateral coordination of non-GSOmobile-satellite service (MSS) transmitting space stations with stations of the FS.
Demand in the land mobile service is on the increase due to annual growth as well as to new data-based service requirements. This has led to the development of more spectrally efficient technologies utilizing digital modulation and in many cases trunking. These technologies are being introduced in systems worldwide to accommodate this demand.
Recommendation ITU-R M.1645 describes in particular the expectations concerning the future development of IMT-2000 and IMT-Advanced: In the framework of technological advances and introduction of IMT-2000 mobile radiocommunications, agreement on uniform and co-ordinated strategies and approaches in the ITU has been and will continue to be a prerequisite for worldwide success.
ITU-R conducted sharing studies related to the candidate bands to determine the suitability of the candidate bands for IMT identification. This Report assesses the feasibility of sharing between IMT systems operating in the 450-470 MHz band and the radiocommunication services having a primary allocation in Section IV of Article 5 of the Radio Regulations – Table ofFrequency Allocations (henceforth referred to simply as the Table) in the 450-470 MHz band and in the adjacent 420-450 MHz and 470-480 MHz bands. This study addresses onemember of the IMT family, i.e. IMT-2000 CDMA Multi-Carrier (CDMA-MC).For ease of reference, CDMA-MC operating in the 450-470 MHz range is referred to as CDMA450 throughout the document. Further revisions of this Report may include other technologies in the IMT family.
This Report addresses the application and implications of SDR to land mobile systems, including, but not limited to, IMT-2000 and systems beyond, dispatch systems, intelligent transport systems (ITS), public mobile systems including public protection and disaster relief (PPDR), and first and second generation cellular systems including their enhancements. It addresses issues on the efficient use of spectrum using SDR techniques and adaptive control mechanisms, frequency sharing issues relating to SDR and general technical issues.
Single-ended method for objective speech quality assessment in narrow-band telephony applications SERIES P: TELEPHONE TRANSMISSION QUALITY, TELEPHONE INSTALLATIONS, LOCAL LINE NETWORKS Objective measuring apparatus Study Group 12
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