通用陸地移動(dòng)無(wú)線服務(wù)設(shè)備檢測(cè)

通用陸地移動(dòng)無(wú)線服務(wù)設(shè)備檢測(cè)項(xiàng)目報(bào)價(jià)？??解決方案？??檢測(cè)周期？??樣品要求？

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ITU-R INFORME SM.2092 SPANISH-2007積極的服務(wù)分配在相鄰或附近的區(qū)域?qū)Φ厍蚩碧叫l(wèi)星服務(wù)(被動(dòng))相關(guān)的影響的研究

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.

ANSI PC63.19 D3.17-2006無(wú)線通信裝置和助聽(tīng)器間兼容性的測(cè)量方法用美國(guó)標(biāo)準(zhǔn)

This standard applies to both wireless communications devices (WDs) and hearing aids. It sets forth uniformmethods of measurement and parametric requirements for the electromagnetic and operational compatibility andaccessibility of hearing aids used with wireless communications devices, including cordless, cellular, PersonalCommunications Service (PCS) phones and Voice over Internet Protocol (VoIP) devices, operating in the range of800 MHz to 3 GHz. However, this version is focused on existing services, which are in common use. Accordingly,in this version tests are provided for services in the 800 - 950 MHz and 1.6 - 2.5 GHz frequency bands. Futureversions may add tests for other frequency bands, as they come into more common use.This standard is intended to apply to all types of hearing aids with acoustic output, including, as examples, behindthe-ear (BTE), in-the-ear (ITE), in-the-canal (ITC), and completely-in-the-canal (CIC) types. Test methods areprovided for hearing aids operating in acoustic (microphone input) mode or in T-coil input mode.The field levels called for in various places shall be maintained within the limits for RF safety, set forth in ANSIC95.1-1999, IEEE Standard for Safety Levels with Respect to Human Exposure to Radio FrequencyElectromagnetic Fields, 3 kHz to 300 GHz.