NEBS GR1089测试咨询
各位好：请问国内哪里能做GR-1089-CORE10.7.1部分/10.7.2这两项
10.7.1VoiceFrequencyNoiseEmissionO10-8Theconductedvoicefrequencynoisemeasuredatthedcpowerportofthenetworkequipmentshouldnotexceedthefollowinglimit:whereIcisthemaximummeasuredinputcurrentoftelecommunicationsloadequipment(orgroupingoftelecommunicationsloadequipment)or1A,whicheverisgreater.NoiseemissionmeasurementsforvoicefrequencyshouldbeperformedwithanoisemeasuringsetwithC-messageweightingasspecifiedinIEEEStd.743-1995.10.7.2WidebandFrequencyNoiseEmissionO10-9Thewidebandfrequencynoiseatthedcpowerportofnetworkequipmentshouldnotexceedthefollowinglimit:whereIcistheratedinputcurrentor1A,whicheverisgreater.dBrnC910IClog+mVrms(inany3-kHzbandfrom10kHzto20MHz)Ic
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