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在 1.5 GHz 頻段工作的衛(wèi)星導(dǎo)航接收機(jī)檢測項(xiàng)目報(bào)價(jià)???解決方案???檢測周期???樣品要求? |
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本標(biāo)準(zhǔn)適用于固定式劑量率儀、報(bào)警裝置和監(jiān)測儀,這些儀器用于防止或減輕放射性釋放或燃料劣化使其保持在核動(dòng)力廠(NPP)/核設(shè)施(NF)的設(shè)計(jì)基準(zhǔn)之內(nèi),并在核動(dòng)力廠/核設(shè)施出現(xiàn)或?qū)е路派湫葬尫呕蛘呷藛T受到輻射照射危險(xiǎn)的事件期間或之后,對人員發(fā)出警告以保證其安全。按照IEC 61226:2009,設(shè)備分為“A”類、“B”類、“C”類或“無類別”。本標(biāo)準(zhǔn)涉及的設(shè)備用于各向同性地測量由能量范圍在50 keV~7 MeV的X或7輻射產(chǎn)生的空氣比釋動(dòng)能、周圍劑量當(dāng)量或其他照射量。設(shè)備主要用于輻射防護(hù)目的并可在獲得或保持核動(dòng)力廠安全中起輔助或間接作用。在本標(biāo)準(zhǔn)規(guī)定的范圍內(nèi),儀器測量的有限能量范圍至少覆蓋80 keV~1.5 MeV。一般規(guī)定這類裝置作為區(qū)域輻射監(jiān)測儀。通常這些裝置用于連續(xù)確定在輻射場可能隨時(shí)間變化的工作區(qū)域(例如,核動(dòng)力廠、粒子加速器、高放射性實(shí)驗(yàn)室、核燃料后處理廠)中的放射性狀況,并在輻射場超出預(yù)定限值時(shí)提供報(bào)警。這些裝置也用于與安全有關(guān)的保護(hù)系統(tǒng)中,例如,允許進(jìn)入可能受輻射場照射區(qū)域的人員通道控制系統(tǒng)。本標(biāo)準(zhǔn)也為在脈沖輻射場使用的設(shè)備給出了指導(dǎo),例如,測量由脈沖輻射或粒子加速器產(chǎn)生的輻射。由于本標(biāo)準(zhǔn)規(guī)定的大多數(shù)設(shè)備在脈沖輻射場中工作可能給出錯(cuò)誤讀數(shù),所以這種指導(dǎo)十分重要。本標(biāo)準(zhǔn)涉及的裝置至少包括:--探測器(例如,電離室、蓋革-米勒計(jì)數(shù)管、閃爍計(jì)數(shù)器、半導(dǎo)體)裝置;--測量裝置可安裝在中央控制盤上,并對報(bào)警裝置和監(jiān)測儀提供輸出信號并能觸發(fā)報(bào)警或緊急停堆/聯(lián)鎖電路的觸點(diǎn)以達(dá)到輻射防護(hù)目的。本標(biāo)準(zhǔn)還適用于為特
本標(biāo)準(zhǔn)規(guī)定了在微波頻率下利用雙諧振器法測試超導(dǎo)體表面電阻的方法,測試目標(biāo)是在諧振頻率下R<下標(biāo)s>隨溫度的變化。改進(jìn)型鏡像介質(zhì)諧振器法,作為另外一種可選用的方法,在附錄B中給出。本標(biāo)準(zhǔn)適用于表面電阻的測試范圍如下:——頻率:8 GHz<f<30 GHz;——測試分辨率:0.01 mΩ(f = 10 GHz)。測試報(bào)告給出在測試頻率下的表面電阻值,并且給出利用R<下標(biāo)S>∝f<上標(biāo)2>的關(guān)系折合到10 GHz的值。
本標(biāo)準(zhǔn)定義了水輪發(fā)電機(jī)組狀態(tài)在線監(jiān)測系統(tǒng)的術(shù)語、提出了狀態(tài)在線監(jiān)測系統(tǒng)的系統(tǒng)功能、基本結(jié)構(gòu)、測點(diǎn)布置以及相關(guān)技術(shù)要求,適用于水電站各種類型水輪發(fā)電機(jī)組的狀態(tài)在線監(jiān)測系統(tǒng)的設(shè)計(jì)、制造和運(yùn)行管理。
GB/T 29306的本部分規(guī)定了以諧振法測定絕緣材料介電性能的試驗(yàn)方法。 本部分適用于以諧振法測定微波頻率范圍(即從約300MHz一直到光頻)中固體、液體或熔融狀介質(zhì)材料的相對電容率、介質(zhì)損耗因數(shù)和與此有關(guān)的量,如損耗指數(shù)。
This Recommendation proposes methodologies for determining performance objectives for digital systems in the 11.7-12.7 GHz, and sets availability objectives for digital systems that are higher than those for analogue systems. Annex 1 to this Recommendatio
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
This Recommendation is intended to provide a basis for the derivation and estimation of the values of electromagnetic radiation from a broadcasting station that occurs at particular distances from the transmittersite. Using such information, responsible
This Recommendation is intended to provide a basis for the derivation and estimation of the values of electromagnetic radiation from a broadcasting station that occurs at particular distances from the transmitter site. Using such information, responsible organizations can then develop appropriate standards that may be used to protect humans from undesirable exposure to harmful radiation. The actual values to be applied in any regulation will naturally depend on decisions reached by responsible health agencies, domestic and worldwide.
This Recommendation is intended to provide a basis for the derivation and estimation of the values of electromagnetic radiation from a broadcasting station that occurs at particular distances from the transmitter site. Using such information, responsible organizations can then develop appropriate standards that may be used to protect humans from undesirable exposure to harmful radiation. The actual values to be applied in any regulation will naturally depend on decisions reached by responsible health agencies, domestic and worldwide.
This Recommendation covers the data structure and dual link serial interface for 525/625-line digital signalsas defined in Recommendation ITU-R BT.601-5.
This Recommendation covers the data structure and dual link serial interface for 525/625-line digital signalsas defined in Recommendation ITU-R BT.601-5.
This Recommendation covers the data structure and dual link serial interface for 525/625-line digital signalsas defined in Recommendation ITU-R BT.601-5.
La présente Recommandation indique les prescriptions etles techniques de base applicables aux systèmes d'accès hertzien fixe fonctionnant dans les bandes au-dessous de 3 GHz à utiliser pour l'établissement de connexions hertziennes dans les zones rurales. Ces prescriptions couvrent les aspects de service ainsi que les objectifs de qualité de fonctionnement et de disponibilité. Les Annexes décrivent les caractéristiques techniques et opérationnelles spécifiquement requises pourles applications d'accès hertzien fixe utilisées dans les zones rurales.
Esta Recomendación proporciona los requisitos básicos y las tecnologías para los sistemas de acceso inalámbrico fijo (FWA) que funcionan en bandas por debajo de 3 GHz para su utilización en las conexiones inalámbricas en zonas rurales. Los requisitos incluyen varios aspectos así como objetivos de calidad de funcionamiento/disponibilidad. Los Anexos presentan información técnica y de funcionamiento necesaria específicamente para aplicaciones FWA utilizadas en zonas rurales.
that according to Article 5 of the Radio Regulations (RR) the frequency bands 406.1- 430 MHz and 440-450 MHz are allocated to the fixed service (FS) on a worldwide basis
This Annex describes a digital RF channelling arrangement for the bands 406.1-430 MHz and 440-450 MHz. The arrangements provide some different channelling and capacities uses.
This Annex describes a digital RF channelling arrangement for the bands 406.1-430 MHz and 440-450 MHz. The arrangements provide some different channelling and capacities uses.
This Annex provides typical technical characteristics for the FS using HAPS in the frequency range of 18-32 GHz focusing on the bands 27.5-28.35 GHz and 31-31.3 GHz, which may be used in the relevant studies.
This Annex provides typical technical characteristics for the FS using HAPS in the frequency range of 18-32 GHz focusing on the bands 27.5-28.35 GHz and 31-31.3 GHz, which may be used in the relevant studies.