Siv RTA Txoj Haujlwm Raws Li Oscilloscope lossis Circuit Analyzer: 4 Cov Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Lub hom phiaj ntawm qhov ua kom yuam kev no yog muab rau cov neeg saib thiab xaiv pheej yig los saib cov teeb liab hluav taws xob ntawm lawv cov kev siv hluav taws xob thiab cov cuab yeej siv cov kev tshuaj xyuas lub sijhawm tiag (RTA). Qhov txiaj ntsig tseem ceeb rau txoj hauv kev no dhau ntawm oscilloscope yog tias RTA cov haujlwm tuaj yeem ua haujlwm ob qho tib si oscilloscope rau pom qhov hluav taws xob ntxiv rau RTA kom pom cov lus teb ntau zaus.

Lub oscilloscope yog qhov zoo rau lub suab yooj yim, tab sis cov cim nyuaj nyuaj rau kev nkag siab. Ib RTA muab qhov pom ntawm qhov ntau zaus ntawm lub teeb liab hauv qab kev sim. Qhov no yog qhov zoo rau kev txheeb xyuas cov ntsiab lus sib haum xeeb hauv lub teeb liab, cov ntsiab lus suab nrov ntau, thiab tseem txiav txim siab qhov cuam tshuam ntawm cov lim.

Cov ntawv thov suav nrog:

• Saib qhov tshwm sim tiag ntawm passive crossovers lossis lim dej kom pom tias lawv cov txiaj ntsig zoo li cas. Qhov no muaj txiaj ntsig zoo rau kev hais lus tus qauv tsim nrog kev cai dhau mus ua ntu zus.
• Saib qhov tso tawm ntawm Circuit ua ntej lossis tom qab lub lim dej lim, lossis tsuas yog saib rau lub suab nrov nws tus kheej.
• Saib thiab khaws cia oscilloscope cov txiaj ntsig lossis cov cim.
• Saib thiab khaws cia cov lus teb zaus tso tawm.
• Saib qhov pib ntawm teeb liab clipping (tshaj qhov hluav taws xob ntsia lossis ntau yam) thiab kev sib haum xeeb cuam tshuam nrog kev txiav. Qhov no tseem muab txoj hauv kev zoo los ntsuas cov ntsuas ntsuas los ntawm kev taug qab cov xwm txheej uas ua rau muaj kev cuam tshuam hauv Circuit Court.
• Teeb meem daws teeb meem los ntawm kev saib ob qho tib si qhov hluav taws xob thiab zaus.
• Ntsuas qhov ua tau zoo ntawm lub tshuab ua suab nrov thiab txiav txim siab yog tias muaj cov ntxaij lim dej hauv lub kaw lus - qhov no muaj txiaj ntsig thaum txiav txim siab tias lub teeb liab zoo li cas hauv OEM/Factory audio systems (tsheb, tso suab, thiab lwm yam). Yog tias koj xav ua qee yam suab zoo dua uas nws ua los ntawm lub hoobkas, nws muaj txiaj ntsig kom paub tias koj tab tom ua haujlwm nrog dab tsi.

Cov vis dis aus kos nrog muab cov lus piav qhia txog txheej txheem. Cov duab suav nrog teeb tsa lub rooj zaum thiab daim duab thaiv ntawm kev teeb liab.

Kauj Ruam 1: Txheeb Xyuas Cov Hluav Taws Xob Ua Haujlwm

Txhawm rau siv lub koos pij tawj ntsuas lub sijhawm tiag tiag (RTA) txhawm rau ntsuas tus cwj pwm hluav taws xob ntawm koj lub Circuit Court, koj yuav tsum txiav txim siab seb qhov hluav taws xob ntau npaum li cas hauv koj lub Circuit Court yuav tsim. Cov tswv yim rau feem ntau lub khoos phis tawj suab suab yog qhov tsawg, tsuas yog volt. Tsis txhob ua dhau qhov RANGE INPUT VOLTAGE RANGE! Qhov no txhais tau tias cov khoom siv hluav taws xob nrog cov hluav taws xob ntau dua yuav tsum tau txo qhov hluav taws xob ntawd mus rau qib uas lees paub. Qhov no tuaj yeem ua tiav nrog kev faib hluav taws xob faib hluav taws xob resistor network lossis kab hloov pauv hloov hluav taws xob lossis khoom siv. Yog tias koj tab tom saib ntawm qhov tso tawm ntawm lub tshuab tso suab, ib kab hloov pauv tau yog lub cuab yeej zoo tshaj plaws rau lub hom phiaj no. Cov kab hloov pauv hloov pauv siv tus neeg hais lus theem teeb liab thiab txo qis lawv mus rau kab theem teeb liab los ntawm cov tes hauj lwm sib txuas lossis lub suab hloov pauv. Koj xav ua qhov ntsuas ntau zaus rau hauv kev txiav txim siab vim tias qee qhov kev hloov pauv raws kab kev hloov pauv yuav cuam tshuam rau cov lus teb zaus.

Txhawm rau txiav txim siab qhov hluav taws xob tso tawm ntawm koj lub Circuit Court lossis ntaus ntawv (yog tias koj tsis paub nws twb tau ua lawm) koj yuav tsum ntsuas nws nrog lub ntsuas hluav taws xob los txiav txim siab ob qho tib si AC thiab DC voltage yam ntxwv. Yog tias qhov ntsuas hluav taws xob xav tau txo qis, taug qab qhov sib piv (cov zis: tawm tswv yim) yog li koj tuaj yeem txhais cov txiaj ntsig. Tsis tas li nco ntsoov nco ntsoov tias koj DMM ntsuas qhov nruab nrab lossis RMS qhov hluav taws xob thiab koj qhov yooj yim nthuav qhia qhov siab tshaj plaws, xa mus rau daim duab txuas.

Yog tias qhov hluav taws xob tso tawm yog 10VAC thiab koj siv lub network resistor lossis cov kab hloov pauv uas coj nws mus rau 1VAC koj muaj qhov sib piv ntawm 10: 1. Qhov ntawd txhais tau tias ntsuas ntawm 0.5VAC ntawm qhov kev zov me nyuam yuav txhais mus rau qhov tseeb Circuit Circuit ntawm 5VAC (0.5 x 10 = 5).

Kuv tau siv txoj hauv kev no los ntsuas qhov ua tau zoo ntawm lub zog muaj zog lub suab nrov nrov. Tsuas yog taug qab koj qhov ntsuas hluav taws xob thiab ua tib zoo saib seb lub cuab yeej pom li cas. Tau kawg, koj muaj lwm qib nce qib muaj yog li nws ua rau txiav txim siab ntsuas qib ntsuas nrog qhov program thiab kho lub suab nce ntawm PC kom ua tiav qhov sib piv siv tau.

Qhov no yog lub sijhawm zoo los hais tias txhua lub Circuit lossis cov cuab yeej muaj qhov cuam tshuam tawm thiab qhov cuam tshuam tawm tswv yim. Koj lub cuab yeej lossis cov khoom siv yuav tsum tau ua qhov no los txiav txim siab hauv kev tsim thiab feem ntau cov suab tawm tswv yim muaj lub siab tawm tswv yim (10k ohms lossis li ntawd). Yog xav paub ntau ntxiv txog cov ncauj lus no, muaj cov vis dis aus online uas piav qhia cov ncauj lus no (saib rau kev qhuab qhia xws li "kev tawm tswv yim thiab kev tawm tsam ntawm cov hluav taws xob thiab cov faib hluav taws xob").

Kauj Ruam 2: Sau cov Cheeb Tsam Tsim Nyog

Vim tias cov lus qhia no thiab kev dag ntxias xav tau kev tshuaj xyuas lub sijhawm tiag (RTA) program, koj yuav xav tau lub PC lossis ntsiav tshuaj nrog daim npav tso suab lossis cov yam ntxwv. Koj tseem yuav xav tau RTA program los khiav ntawm PC lossis rooj. Muaj ntau txoj haujlwm muaj (ob qho pub dawb thiab them nyiaj) uas muaj qhov pom ntau zaus thiab pom oscilloscope.

Nyob ntawm qhov hluav taws xob qhov hluav taws xob tso tawm, koj yuav xav tau kab kab hluav taws xob hloov pauv hluav taws xob lossis khoom siv (saib Kauj Ruam 1).

Koj yuav xav tau cov xov tooj txuas txuas txhua yam ua ke, feem ntau yog cov xov tooj hluav taws xob nrog qhov txiav tawm uas tau sib xws nrog lub suab tawm ntawm koj lub PC lossis ntsiav tshuaj.

Cov cuab yeej lossis Circuit hauv kev sim yuav xav tau, nrog rau txhua yam txhais tau tias koj siv los txhawb nws. Rau qee cov khoom siv no yuav xav tau lub zog siv uas koj ib txwm siv los ntsuas cov cuab yeej.

Kauj Ruam 3: Txuas Cov Khoom Siv

Vim tias koj tab tom siv RTA program hauv PC lossis ntsiav tshuaj los saib cov teeb liab hluav taws xob ntawm koj lub Circuit lossis ntaus ntawv, koj yuav tsum tau txais lub teeb liab los ntawm Circuit lossis ntaus ntawv mus rau hauv PC lossis ntsiav tshuaj. Txoj haujlwm RTA yuav tsum tau hais qhia saib lub suab tawm suab rau lub teeb liab. Xa mus rau cov lus qhia rau koj li RTA program los ua qhov no.

Ib qho yooj yim, koj txuas cov xov hlau rau qhov tso tawm ntawm koj lub Circuit lossis ntaus ntawv thiab txuas lawv mus rau lub suab tso tawm ntawm PC lossis ntsiav tshuaj. Xa mus rau Kauj Ruam 1 yog tias koj xav tau kab kev hloov pauv ntawm Circuit Court thiab PC los txo qhov hluav taws xob mus rau qhov ntau txaus.

Tab sis, ZOO TSHAJ PLAWS kom tsis txhob txhaj tshuaj siab rau hauv koj lub PC lossis koj tuaj yeem ua rau lub suab tsis zoo!

Kauj Ruam 4: Nkag Siab Cov Ntsiab Lus

Txoj haujlwm RTA hauv qhov piv txwv no tso cai rau ob qho kev pom oscilloscope thiab qhov pom kev pom ntau zaus. Kev pom oscilloscope coj tus yam ntxwv zoo ib yam li oscilloscope ib txwm muaj. Vim tias lub suab tso tawm tau hloov kho cov lus tau nce hauv PC lossis ntsiav tshuaj, thiab vim tias koj yuav hloov pauv lub teeb liab mus rau qib uas lees paub, koj yuav tsum txiav txim siab qhov piv piv tiag los siv lub oscilloscope saib los ntsuas qhov ntsuas hluav taws xob. Ua qhov no los ntawm kev siv koj lub ntsuas hluav taws xob ntawm qhov tso tawm hluav taws xob thiab muab piv rau cov zaub ntawm lub vijtsam. Hloov kho kom tau txais lossis qib ntim kom koj muaj qhov sib piv tsim nyog los ua lej yooj yim. Yog tias koj lub Circuit lossis cov cuab yeej muaj qhov hloov pauv tau qhov ntsuas hluav taws xob, ntsuas ntsuas ntawm qib sib txawv los txheeb xyuas qhov koj muaj kev sib raug zoo ntxiv (txhais tau tias qhov sib piv tseem nyob tas li ntawm qhov sib txawv ntim sib txawv). Yog tias koj tsis txaus siab rau qhov ntsuas qhov tseeb vim tias koj twb paub lawm, koj tuaj yeem hla cov theem no.

Kev pom lub ntsej muag zaus yog qhov txiaj ntsig tseem ceeb rau txoj kev no. Hauv qhov kev pom no koj yuav muaj peev xwm xaiv qhov kev daws teeb meem ntawm koj qhov kev pom thiab qhov no tau pom hauv octaves (lossis feem ntawm octaves). 1/1 octave muaj qhov kev daws teeb meem qis tshaj, 1/3 octave pom muaj 3x ntau npaum li kev daws teeb meem. 1/6 octave muaj 6x ntau dua li 1/1 octave. Txoj haujlwm no nqes mus rau 1/24 octave daws teeb meem uas tso cai rau kom ntxaws ntxiv. Qhov kev daws teeb meem twg uas koj xaiv nyob ntawm qhov koj xav tau. Rau ntau lub hom phiaj, pom qhov kev daws teeb meem siab tshaj plaws yog feem ntau xav tau.

Lwm tus nqi ntawm kev txaus siab yog tus nqi nruab nrab. Qhov no txiav txim siab li cas RTA txoj haujlwm yuav nruab nrab qhov txiaj ntsig. Yog tias koj xav pom qhov hloov pauv ntawm lub sijhawm tiag tiag ces khaws tus nqi nruab nrab tsawg heev (ntawm 0 - 5). Yog tias koj xav pom "lub xeev ruaj khov" sawv cev ntawm lub voj voog, qhov nruab nrab qhov txiaj ntsig ntau dua 20 yog qhov muaj txiaj ntsig. Nco ntsoov tias koj yuav tau tos ntev dua rau cov txiaj ntsig thiab pom qhov hloov pauv yog tias qhov nruab nrab siab.

Yog tias koj tab tom nrhiav kom kawm paub cov lus teb zaus ntawm lub suab kaw lus, koj yuav xav kom lub Circuit Court sim tsim lub teeb liab uas npog tag nrho qhov siv tau ntau zaus (feem ntau 20Hz txog 20, 000Hz). Qhov no tuaj yeem ua tiav los ntawm kev muaj cov kab hluav taws xob rov tsim cov suab paj nruag liab uas tsis cuam tshuam lossis suab nrov thaum saib xyuas qhov tso tawm ntawm RTA.

Cov duab tawm los ntawm kev ntsuas hluav taws xob suav nrog cov ntsiab lus crossover ntawm passive crossover, lub Hoobkas EQ thiab kho cov lus teb ntawm 2014 Honda Accord, lub Hoobkas EQ ntawm 2017 Malibu LT ntawm 5 ntim theem, oscilloscope pom ntawm 1kHz clipped tones, thiab zaus lus teb saib ntawm 50Hz tones clipped thiab tsis clipped.

Khiav Tawm Hauv Cov Khoom Siv Hluav Taws Xob & Kev Sib Tw Tricks