Yuav ua li cas siv lub oscilloscope los kuaj lub crystal oscillator
Crystal oscillators muaj xws li passive crystal oscillators thiab siv lead ua oscillators. Qhov pib waveform ntawm crystal oscillator tuaj yeem ntsuas nrog oscilloscope. Txoj kev ntsuas cov crystal oscillator waveform yog qhia hauv qab no.
Passive crystal oscillator siv oscilloscope los ntsuas waveform
Thaum lub passive crystal oscillator pib oscillating, ob tus pins yuav tsim oscillation waveforms. Txuas tus ncej tsis zoo ntawm lub oscilloscope sojntsuam rau GND thiab tus ncej zoo rau txhua tus siv lead ua oscillator tus pin kom pom cov waveform ntawm cov siv lead ua oscillator.
Raws li ib txwm muaj, lub waveform ntawm passive crystal oscillator yog sine yoj. Lub sine waveform tuaj yeem pom los ntawm oscilloscope. Qhov ntsuas zaus yuav tsum ua raws li qhov pib zaus ntawm crystal oscillator.
Active siv lead ua oscillator siv oscilloscope los ntsuas waveforms
Feem ntau, cov siv lead ua oscillator muaj plaub tus pins, ob lub hwj huam mov pins, ib tus pin tso zis, thiab lwm tus pin yog sab laug los yog txuas nrog GND. Thaum ntsuas, koj yuav tsum txuas tus ncej zoo ntawm oscilloscope sojntsuam rau tus pin tso zis thiab tus ncej tsis zoo rau GND. Muaj ob lub waveforms tso zis los ntawm lub active siv lead ua oscillator: sine yoj thiab square yoj. Qhov no feem ntau yog nyob ntawm seb cov siv lead ua oscillator puas muaj kev sib txuas ua ke. Yog hais tias muaj ib tug shaping circuit nyob rau hauv, nws yuav output ib square yoj, txwv tsis pub nws yuav output ib sine yoj.
Tej yam yuav tsum nco ntsoov thaum ntsuas
Thaum ntsuas qhov siv lead ua oscillator waveform, koj yuav tsum xyuam xim rau ob yam: 1) bandwidth ntawm oscilloscope; 2) lub load capacitance. Lub bandwidth ntawm oscilloscope yuav tsum siab tshaj qhov pib zaus ntawm cov siv lead ua oscillator, tsawg kawg yog 5 zaug, txwv tsis pub cov ntsuas waveform yuav distorted. Cov siv lead ua oscillator yog qhov tseem ceeb rau lub load capacitance, yog li qhov cuam tshuam ntawm cov khoom siv hluav taws xob ntawm qhov ntsuas yuav tsum raug txo kom tsawg thaum ntsuas.
Cov kauj ruam rau kev siv oscilloscope los soj ntsuam hluav taws xob teeb liab waveforms.
1.Xaiv Y-axis coupling txoj kev
Raws li qhov zaus ntawm lub teeb liab raug ntsuas, teeb tsa Y-axis input coupling hom xaiv "AC-av-DC" hloov mus rau AC lossis DC.
2. Xaiv Y-axis rhiab heev
Raws li qhov kwv yees qhov siab tshaj plaws-rau-peak tus nqi ntawm cov teeb liab ntsuas (yog tias siv cov kev sojntsuam attenuation, nws yuav tsum tau muab faib los ntawm ntau yam attenuation; thaum lub coupling hom yog nyob rau hauv DC iav, superimposed DC voltage tus nqi yuav tsum tau txiav txim siab. ), xaiv Y-axis rhiab heev V / div hloov (los yog Y-axis attenuation hloov) yog teem rau theem tsim nyog. Yog tias koj tsis tas yuav nyeem qhov ntsuas qhov ntsuas qhov ntsuas hauv qhov kev siv tiag tiag, koj tuaj yeem kho qhov Y-axis rhiab heev zoo-tuning (lossis Y-axis nce) pob qhov rooj los tso saib cov waveform nrog qhov siab xav tau ntawm qhov screen.
3. Xaiv lub cim (los yog synchronization) teeb liab qhov chaw thiab polarity
Feem ntau qhov ua rau (lossis synchronization) lub teeb liab polarity hloov tau muab tso rau hauv "" lossis "-" txoj haujlwm.
4.Xaiv scanning ceev
Teem lub X-axis scanning ceev t / div (los yog scanning range) hloov mus rau theem tsim nyog raws li qhov kwv yees tus nqi ntawm lub sij hawm (los yog zaus) ntawm lub teeb liab raug ntsuas. Yog tias tsis muaj qhov xav tau los nyeem cov sijhawm ntsuas tus nqi hauv kev siv tiag tiag, lub cheb ceev t / div fine-tuning (los yog scan fine-tuning) pob qhov rooj tuaj yeem hloov kho kom tsim nyog kom lub waveform ntawm tus naj npawb ntawm cov voj voog uas yuav tsum tau ua. yuav tshwm rau ntawm qhov screen. Yog tias qhov yuav tsum tau pom yog qhov ntug ntawm lub teeb liab, lub cheb ceev t / div hloov yuav tsum tau teem rau qhov ceev tshaj plaws cheb ceev.
5. Muab lub teeb liab los ntsuas
Tom qab ntsuas lub teeb liab yog attenuated los ntawm kev sojntsuam (los yog cov tswv yim ncaj qha los ntawm coaxial cable yam tsis muaj attenuation, tab sis lub sij hawm no lub input impedance txo thiab input capacitance nce), nws yog input rau hauv oscilloscope los ntawm Y-axis input davhlau ya nyob twg.
