Yuav ua li cas siv ib tug multimeter los txiav txim seb lub oscilloscope yog zoo los yog phem?
Tom qab pib thiab nkag mus rau qhov kev xeem interface, qhov kev pab cuam sab hauv muaj "kev sim tus kheej" muaj nuj nqi. Thaum qhov "kev xeem tus kheej" ua tiav, qhov kev ceeb toom ntawm "kev ntsuas tus kheej dhau" (SELF-TEST PASSED) yuav tshwm rau ntawm qhov screen.
"Kev kuaj xyuas tus kheej" muaj nuj nqi ntawm cov kev pabcuam sab hauv tsuas tuaj yeem tshawb xyuas qee lub xeev sab hauv, feem ntau nco, thiab lwm yam, thiab lwm yam haujlwm yuav tsum tau kuaj xyuas manually.
1. Lub oscilloscope yuav tuaj nrog lub teeb liab ntsuas, txuas cov kev sojntsuam mus rau qhov ntsuas qhov ntsuas qhov kawg ntawm oscilloscope, feem ntau yog lub teeb liab square ntawm 1 ~ 5V / 1KHZ,
2. Nias lub khawm teeb tsa tsis siv neeg (AUTOSET), nws tuaj yeem ua rau manually.
Ib qho chaw ruaj khov thiab tsis tu ncua square yoj teeb liab yuav tsum tau tshwm sim ntawm qhov screen, raws li pom hauv daim duab hauv qab no
Txoj kev no xyuas seb lub luag haujlwm tseem ceeb ntawm oscilloscope puas yog qhov qub, xws li triggering, synchronization, thiab lwm yam, thiab tib lub sijhawm xyuas seb qhov nyiaj them ntawm qhov kev sojntsuam puas tsim nyog, txwv tsis pub yuav tsum tau kho kom zoo.
3. Oscilloscope bandwidth
Bandwidth: Muab lub teeb liab sinusoidal rau oscilloscope, thiab qhov zaus taw tes thaum nws attenuates rau 70.7 feem pua ntawm qhov tseeb amplitude yog bandwidth ntawm oscilloscope, uas yog tus nqi zaus ntawm -3dB.
Piv txwv li: DPO4104 muaj bandwidth ntawm 1GHZ. Thaum lub teeb liab sinusoidal nrog amplitude ntawm 30mv muab rau nws, yog tias qhov ntsuas amplitude siab dua 21.21mv (30 * 70.7 feem pua =21.21), ces nws cov bandwidth tuaj yeem ncav cuag 1GHZ. Yog tias nws qis dua 21.21mv, nws txhais tau tias qhov bandwidth ntawm no oscilloscope tsis tuaj yeem ua tau raws li qhov xav tau tiag tiag, uas yog, qhov ntsuas tsis tsim nyog.
4. Seb qhov impedance ntawm txhua channel ntawm oscilloscope yog tsim nyog
Kev ntsuas ntawm impedance yog qhov yooj yim heev, thiab txoj hauv kev yooj yim yog ntsuas nws nrog lub ntsuas hluav taws xob, lossis nrog 5.5-tus lej lossis 6.5-digit digital multimeter. Tus nqi ntsuas qhov tseeb yog tsim nyog ntev npaum li nws nyob hauv qhov kev ua yuam kev.
