Lub ntsiab lus ntawm oscilloscope sojntsuam × 1 thiab × 10
Ntawm qhov kev sojntsuam oscilloscope dav dav (zoo ib yam li kev sojntsuam ntawm multimeter), muaj qhov hloov me me rau xaiv ntawm × 1 thiab × 10. Thaum xaiv qhov × 1 qib, lub teeb liab nkag mus rau hauv oscilloscope yam tsis muaj attenuation. Thaum xaiv qhov × 10 qib, lub teeb liab yog attenuated rau 1/10 thiab ces xa mus rau oscilloscope. Yog li ntawd, thaum siv qhov × 10 qib ntawm oscilloscope, kev nyeem ntawv ntawm oscilloscope yuav tsum tau nthuav dav 10 zaug (rau qee qhov oscilloscopes, koj tuaj yeem xaiv qhov × 10 qib ntawm oscilloscope sab los siv nws nrog kev sojntsuam. tom qab oscilloscope sab kuj tau teem rau × 10 qib, Tsuas yog nyeem nws ncaj qha). Thaum peb xav ntsuas qhov hluav taws xob ntau dua, peb tuaj yeem siv × 10 kev ua haujlwm ntawm kev sojntsuam kom txo qis qhov siab dua ua ntej nkag mus rau hauv oscilloscope.
Tsis tas li ntawd, cov tswv yim impedance ntawm × 10 iav yog siab dua li ntawm × 1 iav, yog li thaum kuaj cov teeb liab waveforms nrog lub peev xwm tsav tsis muaj zog, teeb tsa qhov kev sojntsuam mus rau × 10 iav tuaj yeem muab kev ntsuas zoo dua. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias thaum qib ntawm lub teeb liab voltage tsis meej, koj yuav tsum ntsuas nws nrog qib × 10 ua ntej. Tom qab paub meej tias qhov hluav taws xob tsis siab dhau lawm, koj tuaj yeem xaiv qhov tseeb ntau qib rau kev ntsuas. Nws yog ib qho tsim nyog los tsim tus cwj pwm no, txwv tsis pub, Yog tias muaj ib hnub oscilloscope puas vim qhov no, nws yuav lig dhau los ua kev khuv xim nws.
Cov neeg feem ntau nug, vim li cas kuv tsis tuaj yeem pom lub waveform ntawm lub siv lead ua oscillator pin nrog oscilloscope? Ib qho laj thawj yog vim li cas lub × 1 iav ntawm qhov kev sojntsuam yog siv, uas yog sib npaug rau qhov hnyav hnyav (ib qho oscilloscope sojntsuam siv lub × 1 iav muaj qhov muaj peev xwm ntawm ntau pua pF) txuas nrog rau qhov sib npaug ntawm cov siv lead ua oscillator circuit, ua rau lub voj voog nres oscillating. . Txoj kev raug yuav tsum yog siv lub × 10 iav ntawm kev sojntsuam. Qhov no yuav tsum tau sau tseg thaum siv. Txawm hais tias qhov oscillation tsis nres, lub waveform tiag tiag yuav tsis pom vim qhov hloov pauv ntau dhau ntawm oscillation.
