共找到 150 條與 頻率 相關(guān)的標(biāo)準(zhǔn),共 10 頁
Measurement of power ripple ratio of reflex klystrons
Measurement of electrical properties of microwave tubes--Part 5: Low-power oscilator klystrons
Technical conditions for small power supply transformers and filter choke coils
本系統(tǒng)表規(guī)定了時(shí)間頻率量值由時(shí)間頻率計(jì)量基準(zhǔn)經(jīng)過計(jì)量標(biāo)準(zhǔn)傳遞到工作計(jì)量器具的傳遞程序、傳遞方法及最佳測量能力。在開展校準(zhǔn)時(shí),也可作為量值溯源的依據(jù)
Time and Frequency Measuring Instruments
Verification Regulation of 300 MHz Frequency Response Test Set
Optical Wavelength/Frequency Meter
本標(biāo)準(zhǔn)規(guī)定了電氣設(shè)備的標(biāo)準(zhǔn)頻率值。 本標(biāo)準(zhǔn)適用于頻率從50Hz~10 000Hz的單相和三相交流電力系統(tǒng)及電氣設(shè)備(包括電工設(shè)備、電子設(shè)備、電信設(shè)備以及家用和類似用途的電氣器具)。 本標(biāo)準(zhǔn)不適用于下列情況: 鐵道信號(hào)控制回路; 單臺(tái)設(shè)備或一組設(shè)備的內(nèi)部控制回路
Standard frequencies
Measurement of frequency resettability of reflex klystrons
本標(biāo)準(zhǔn)規(guī)定了排氣消聲器的技術(shù)要求、試驗(yàn)方法、檢驗(yàn)規(guī)則和標(biāo)志、包裝、貯存等。 本標(biāo)準(zhǔn)適用于中小功率柴油機(jī),其它柴油機(jī)亦可參照使用
Specifications for exhaust mufflers of small and medium power diesel engines
Measurement of intermodulation distortion ration of power klystrons
3J60 Technical Conditions of Constant Elasticity Alloy for Frequency Components
本標(biāo)準(zhǔn)適用于與使用時(shí)極接近人體頭部及靠在人耳之裝置的輻射部位一起使用之電磁場[electromagnetic field,(EMF)]的發(fā)射設(shè)備,包括行動(dòng)電話,無線電話等。頻率范圍為300 MHz至3 GHz。本標(biāo)準(zhǔn)之目的在于明確規(guī)定證明該設(shè)備符合其比吸收率(SAR)限制值之量測方法
Human exposure to radio frequency fields from hand-held and body-mounted wireless communication devices – Human models, instrumentation, and procedures – Part 1: Procedure to determine the specific absorption rate (SAR) for hand-held devices used in c
本標(biāo)準(zhǔn)適用于連續(xù)額定、額定頻率60Hz、額定電壓600V以下、在周圍溫度40℃以下使用之低壓三相鼠籠型高效率感應(yīng)電動(dòng)機(jī)(以下簡稱高效率電動(dòng)機(jī)
Low-voltage three-phase squirrel-cage high-efficiency induction motors(for general purpose)
本標(biāo)準(zhǔn)適用于汽車上使用之速率計(jì)(以下簡稱速率計(jì)
Speedometers for Automobiles
Method of measurement for frequency-voltage characteristics of O-type backward-wave tubes
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