Ukubingelela!
Ngengeza indatshana emfushane esihlokweni sokukhetha i-oscilloscope yasekhaya ehlangene yezinga lokungena yomsebenzi nezinto zokuzilibazisa.
Kungani sizokhuluma nge-pocket kanye ne-compact - ngoba lezi yizinketho eziningi zesabelomali. Ama-oscilloscope edeskithophu anamandla kakhulu, amadivaysi asebenzayo, futhi, njengomthetho, amamodeli abiza kakhulu ($ 200-400 noma ngaphezulu) aneziteshi ezi-4 ezinemisebenzi eminingi.
Kodwa amamodeli ahlangene anesiteshi esingu-1 sokulinganisa okulula nokuhlolwa komumo wesignali angathengwa ngo-$20 ngokoqobo...$40.
Ngakho-ke, izici eziyinhloko zobuchwepheshe ze-pocket oscilloscopes yi-bandwidth yokusebenza, elinganiswa ku-MHz, kanye nemvamisa yesampula, ethinta ngokuqondile ikhwalithi yezilinganiso.
Kulesi sihloko ngizozama ukuchaza ama-oscilloscopes enginawo mathupha futhi nginikeze okuhle nokubi kulawa mamodeli.
Inketho yokuqala iningi labasafufusa bomsakazo abaye badlula kuyo i-oscilloscope esekwe ku-ATmega microcontroller; u-Ali unezinketho eziningi, okuhlanganisa ukuzihlanganisa, ngokwesibonelo, i-DSO138. Ukuthuthukiswa kwayo okusekelwe ku-STM32 microcontroller kubizwa ngokuthi i-DSO150.
- Lena i-oscilloscope enhle yomuntu ofunda umsakazo wezinga lokungena. Ikhithi ifaka uphenyo lwe-P6020. I-oscilloscope ngokwayo inomkhawulokudonsa ongaba ngu-200 kHz. Yakhiwe ngesisekelo se-STM32, ADC kufika kumasampuli angu-1M. Inketho enhle yokuhlola izinsiza zamandla ezilula (PWM) nezindlela zomsindo. Ifanele abaqalayo, isibonelo, ukutadisha izimpawu zomsindo (ukusetha i-amplifier, njll.). Phakathi kokubi, ngibona ukungakwazi ukulondoloza isithombe se-oscillogram, kanye nomkhawulokudonsa omncane.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 1 MSa/s
- Ububanzi be-Analog: 0 - 200 kHz
- Ibanga lokuzwela: 5 β 20 mV/div
- I-voltage ephezulu yokufaka: 50V max. (1x ukuhlola)
- Ibanga lesikhathi sokushanela: 500s/div β 10 Β΅s/div
Uma ufisa, ungathola inguqulo engabizi ngisho eshibhile. Ifanele ukufunda i-soldering "enencazelo".
Kodwa umsebenzi wokuzilibazisa wadlula ngokushesha futhi wadlulela kumamodeli abalulekile.
Ekuqaleni kuka-2018, ngathola enye yezinketho ezithandwayo zama-oscilloscopes esezingeni lokungena - elula, kodwa hhayi embi.
I-oscilloscope ye-DSO188 βimitha yokubonisaβ elula enesiteshi esisodwa, engenayo inkumbulo, kodwa enesibonisi sombala, ibhethri engu-300mAh nosayizi omncane kakhulu. Inzuzo yayo ukubumbana nokuphatheka kwayo, futhi ibhande lokuvama lanele ezinhlelweni eziningi (isibonelo, ukusetha imishini yomsindo).
Ngezindleko eziphansi ($30), ibonisa amasiginali ku-1 MHz (isampula engu-5MSA/s). Ama-MMCX probe asetshenziselwa ukusebenza, kodwa ikhithi ihlanganisa i-adaptha ye-MMCX-BNC. I-5MSPS ADC ehlukile ifakiwe, umkhawulokudonsa ufika ku-1 MHz, icala liqoqwe kusuka kumaphaneli, abukeka kahle kakhulu. Ngakolunye uhlangothi, ngiphawula usayizi ohlangene kanye nomkhawulokudonsa ohloniphekile, uma kuqhathaniswa ne-DSO150 (1 MHz), kanye nosayizi ohlangene. Kulula kakhulu ukusebenzisa kanye nomhloli ojwayelekile. Ingena kalula ephaketheni lakho. Kuma-minuses, icala linomklamo ovulekile ongavikelekile kumathonya angaphandle (udinga ukuguqulwa), kanye nokungakwazi ukudlulisa izithombe ezilondoloziwe kukhompyutha. Ukuba khona kwesixhumi se-MMCX kulula, kodwa ukuze usebenze ngokugcwele uzodinga i-adaptha ye-BNC noma ama-probes akhethekile. Ngemali, lokhu kuyindlela enhle kakhulu yezinga lokungena.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 5 MSa/s
- Ububanzi be-Analog: 0 - 1 MHz
- Ibanga lokuzwela: 50 mV/div ~ 200 V/div
- I-voltage ephezulu yokufaka: 40 V (1X probe), 400 V (10X probe). Asikho isinqamuleli sesignali esakhelwe ngaphakathi.
- Isikhathi sokushanela ibanga: 100mS/div ~ 2uS/div
Uma i-megahertz eyodwa inganele, ungabheka ngasephaketheni oscilloscopes endlini enesixhumi se-BNC, isibonelo, i-pocket oscilloscope eshibhile i-DSO FNISKI PRO.
Lena inketho enhle kakhulu ngemali yakho. Ibhendi engu-5 MHz (sine). Kungenzeka ukugcina amagrafu kumemori yangaphakathi yocingo.
Π’Π΅Ρ Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 20 MSa/s
- Ububanzi be-Analog: 0 - 5 MHz
- Ibanga lokuzwela: 50 mV/div ~ 200 V/div
- I-voltage ephezulu yokufaka: 40 V (1X probe), 400 V (10X probe). Asikho isinqamuleli sesignali esakhelwe ngaphakathi.
- Isikhathi sokushanela ibanga: 50S/div ~ 250nS/div
(nomkhawulokudonsa kufika ku-10 MHz).
Ngingathatha inketho yokuqala (ngezingwenya) futhi ngithenge ama-probe engeziwe ngokwehlukana. Isixhumanisi sama-probe singezansi.
Ngokusekelwe emiphumeleni yokusetshenziswa, ngingathanda ukuqaphela ikesi elinethezekile nesibonisi esikhulu. Isignali yokuhlola ku-5 MHz (sine) ibonisa ngaphandle kwezinkinga, amanye amasiginali wezikhathi ezithile nawezikhathi ngokuvamile abonisa kufika ku-1 MHz.
Uma umkhawulokudonsa ongaphezu kuka-1 MHz ungabalulekile futhi ungadingi ukusebenza ngama-voltage aphezulu, khona-ke i-DSO FNIRSI PRO enesixhumanisi se-BNC iyisinqumo esihle. Isebenzisa ama-probe ajwayelekile futhi ingasetshenziswa njenge-pocket oscilloscope probe esheshayo - gxuma futhi ubone ukuthi ukushintshanisa, i-microcircuit, njll. kuyaphila. Bese unyathela ngemuva kwe-oscilloscope enkulu, noma uthwale isiguli usibeke etafuleni bese usivula.
Kodwa uma udinga umkhawulokudonsa owengeziwe, naka okungabizi
I-oscilloscope ye-DSO168 inomklamo ongajwayelekile ofana nabadlali beMP3 abadumile. Lokhu kokubili ukuhlanganisa (umzimba wensimbi osesitayeleni) kanye nokususa idivayisi. Akuyona inketho engcono kakhulu yesixhumi - i-MiniUSB yokushaja ibhethri. Ngizophinde ngiqaphele ukuxhumana ngejekhi engu-3.5 mm - ukonakala okukhulu kwale modeli.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 50 MSa/s
- Ububanzi be-Analog: 0 - 20 MHz
- Ibanga lokuzwela: 50 mV/div ~ 200 V/div
- I-voltage enkulu yokufaka: 40 V (1X probe)
- Isikhathi sokushanela ibanga: 100S/div ~ 100nS/div
I-DSO168 iyidivayisi ethokozisayo ngentengo yayo.
Ingcono kakhulu kunenombolo enkulu ye-DSO138 efanayo, eyakhiwe ngesisekelo sama-microcontroller ane-ADC eyakhelwe ngaphakathi (200kHz).
Le modeli ye-DSO168 ine-AD9283 ADC ehlukile, ehlinzeka ngokuhlaziywa okuthembekile kwamasiginali afika ku-1 MHz. Kufika ku-8 MHz, le divayisi ingasetshenziswa, kodwa "njengesibonisi" samasignali, ngaphandle kwezilinganiso ezibucayi. Kodwa kuze kufike ku-1 MHz - ayikho inkinga.
Ikhithi ihlanganisa uphenyo olujwayelekile lwe-P6100 BNC, kanye ne-adaptha esuka kujack engu-3.5mm ukuya ku-BNC.
I-oscilloscope ye-DSO168 inomkhawulokudonsa we-20 MHz (ngemvamisa yesampula engu-60MSA/s), hhayi ephumelele kakhulu, kodwa i-ala iPod ebukeka kahle kakhulu, ibhethri eyakhelwe ngaphakathi engu-800 mAh (inganikwa amandla nge-USB). Ukufana nomdlali kwengezwa ngama-probe ngejekhi engu-3,5 mm (kukhona i-adaptha ye-BNC-3.5mm). Ayikho inkumbulo yokulondoloza ama-waveform. Ngingathanda ukuqaphela iphutha lokuklama - ijekhi engu-3,5 mm ayihloselwe ukudlulisa amasiginali we-microwave; kukhona ukuhlanekezela ukuma kwesiginali kumafrikhwensi angaphezu kuka-1 MHz. Ngakho idivayisi iyathakazelisa, kodwa ngingakhetha inketho ehlukile.
Okulandelayo, ngiphakamisa ukubheka enye imodeli engabizi ye-oscilloscope ye-DSO338 ene-bandwidth engu-30 MHz.
Lena i-oscilloscope enamandla yebhethri elingana ephaketheni yesiteshi esisodwa esinemvamisa yesampula efika ku-200Msps. Izici azimbi, ngoba abaningi le modeli yanele emehlweni. Kunesiteshi esisodwa, isibonisi sinama-engeli amahle wokubuka, futhi isikhathi sokusebenza sifinyelela emahoreni angu-8 ngokushajwa okukodwa ngokuqhubekayo.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 200 MSa/s
- Ububanzi be-Analog: 0 - 30 MHz
- Ibanga lokuzwela: 50 mV/div ~ 200 V/div
- I-voltage ephezulu yokufaka: 40 V (1X probe), 400 V (10X probe). Asikho isinqamuleli sesignali esakhelwe ngaphakathi.
- Isikhathi sokushanela ibanga: 100mS/div ~ 125nS/div
Uphenyo olujwayelekile lwe-P6100 BNC lusetshenziselwa izilinganiso.
I-oscilloscope isebenza kahle kakhulu kumafrikhwensi angaphezu kuka-10-20 MHz.
Inketho enhle, kodwa unikezwe izindleko zayo, ungabheka amanye amamodeli.
Isibonelo, ungathenga okumba eqolo
Imodeli entsha futhi enye engcono kakhulu yemali - i-oscilloscope yesiteshi esisodwa engu-100 MHz enenkumbulo. Amazinga amasampula afinyelela ku-500 Msps.
I-oscilloscope ingenye "yenamandla" futhi "eyinkimbinkimbi" ebangeni layo lentengo. Kukhona isiteshi se-BNC esingu-1, kodwa i-oscilloscope ingabonisa isignali ye-sine wave efika ku-100MHz. Amanye amasiginali we-periodic kanye ne-aperiodic abukeka ajwayelekile aze afike ku-70-80 MHz.
I-oscilloscope iza nophenyo oluhle lwe-P6100 olunesihlukanisi se-10x kanye nomkhawulokudonsa ofinyelela ku-100 MHz, kanye nekesi lokugcina nokuthwala.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 500 MSa/s
- Ububanzi be-Analog: 0 - 100 MHz
- Ibanga lokuzwela: 50 mV/div ~ 100 V/div
- I-voltage ephezulu yokufaka: 80 V (1X probe), 800 V (10X probe). Asikho isinqamuleli sesignali esakhelwe ngaphakathi.
- Isikhathi sokushanela ibanga: 50S/div ~ 6nS/div
I-oscilloscope ibhekana nezimpawu ezimbi kakhulu kunomfowabo omdala uRigol.
Ngizoqaphela ukuntuleka kokuxhumana nekhompyutha (ngokwengxenye lokhu akuyona i-minus, njengoba asikho isidingo sokuhlukaniswa kwe-galvanic), kanye nokuba khona kwesiteshi esisodwa kuphela sokulinganisa.
I-DSO Fniski 100MHz iyisinqumo esihle, ikakhulukazi uma ingekho idivayisi efanelekile futhi indaba yezindleko inzima. Uma kungenzeka ukwengeza, kungcono ukwengeza nokuthatha okuthile eziteshini ezimbili kanye nekhono lokulondoloza imiphumela.
I-hit ka-2019 iyi-oscilloscope ephathekayo ene-frequency ye-40 MHz (kukhona imodeli engu-2C72 kufika ku-70 MHz) eneziteshi ezimbili kanye nejeneretha yefrikhwensi. I-multimeter eyakhelwe ngaphakathi. Iza nesikhwama sokuthwala. Intengo isuka ku-$99.
Ikhithi ihlanganisa konke okudingayo + ikesi eliphethe. Amanani amasampula afika ku-250MSa/s ayimiphumela engcono kakhulu yama-oscilloscopes aphathekayo. Kukhona izinguqulo 2Π‘42/2Π‘72 ngaphandle kwejeneretha eyakhelwe ngaphakathi, kodwa azithakazelisi kangako ngokwentengo nokusebenza.
Π’Π΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 250 MSa/s
- Ububanzi be-Analog: 0 - 40 MHz
- Ibanga lokuzwela: 10 mV/div ~ 10 V/div
- I-voltage ephezulu yokufaka: 60 V (1X probe), 600 V (10X probe).
- Isikhathi sokushanela ibanga: 500S/div ~ 5nS/div
I-oscilloscope ibiza kancane kunangaphambili, kodwa imodeli ye-2Dx2 ifakwe i-generator frequency. Isithombe esingezansi sibonisa ukukhiqizwa kwegagasi lesine le-1 MHz.
Ngaphandle kwalokho, i-Hantek ayibi kakhulu kunabafowabo abadala. Ngizoqaphela ukuba khona kwe-multimeter eyakhelwe ngaphakathi, eyenza le modeli ibe idivayisi ye-3-in-1.
Ama-oscilloscope enginawo aphelile, kodwa ngizokhomba enye imodeli enelungelo lokuphila. Kulolu hlu lwamanani kukhona intofontofo nekhwalithi ephezulu .
Π’Π΅Ρ Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ:
- Izinga lesampula lesikhathi sangempela: 200 MSa/s
- Ububanzi be-Analog: 0 - 30 MHz
- Ibanga lokuzwela: 10 mV/div ~ 10 V/div
- I-voltage ephezulu yokufaka: 60 V (1X probe), 600 V (10X probe).
- Isikhathi sokushanela ibanga: 500S/div ~ 5nS/div
Ngincoma ukuthi unake izesekeli eziwusizo ze-oscilloscope:
Amadivayisi aphathekayo afana nalawa yiwona engivame ukuwasebenzisa. Elula kakhulu, ikakhulukazi lapho usetha amadivaysi ahlukahlukene, ukuhlola, ukuthunywa. Ngingancoma ukuthatha inguqulo ye-DSO150, noma okungcono nakakhulu, i-DSO138 (200kHz) efanayo enguqulweni ye-DIY yokufunda i-soldering kanye nezisekelo zama-electronics omsakazo. Phakathi kwamamodeli asebenzayo, ngingathanda ukuqaphela i-DSO Fniski 100MHz njenge-oscilloscope enenani elingcono kakhulu/isilinganiso somkhawulokudonsa osebenzayo, kanye ne-Hantek 2D72 njengesebenza kakhulu (3-in-1).
Source: www.habr.com