Makalunin Oscilloscope

Idan kana bi so ku fada game da sampling oscilloscope, yana bukata cewa a sani da yawan da rayukansu na oscilloscope mai kyau. Wannan shi ne wurin da ya samu waɗanda suka bayar ko zama wadanda suke faruwa kan layi na wasu layon. Sampling oscilloscope ita ce babban rawa da ke digital oscilloscope tare da wasu abubuwan da za su iya amfani da su don ingantaccen abubuwa.

An kirkiro shi don in ba da matsayin funfi mai takam-takam da ke yi daga cikin samun wasu layon. Ana amfani da teorema na samun don bincike layon daga cikin wasu layon. Idan ana amfani da rabi light, ana iya gani tsarin haruffa, amma idan ana ci gaba daya, ana iya gani tsarin haruffa mai takam. Sampling oscilloscope yana yi aiki a haka kamar hanyar stroboscopic da ake amfani don gani layon mai takam. Yana bukata cewa ana buƙata 1000 poini don bincike layon.

Ayoyinta da Sampling Oscilloscope Ya Yi

Kamar sunan, an samu waɗanda suka faruwa kan layi na wasu layon da suke faruwa kan layi, kuma an bincike layon daga cikin cikakken bayanan. An fi layon da aka bincike da low band pass filter kuma an fito a cikin layi. Layon da aka bincike ne an yi a haka kamar duk daga cikin wasu poini masu halaye don bincike tsarin da ke faruwa.

Har da poini na layon shine deflection na jeriyar da ke faruwa kan layi na wasu layon. Ana amfani da su don monitoci layon mai takam da kaɗuwar 50 GHz ko kadan. Daga cikin layon da aka bincike, frequency ta ya fiye da sample rate ta scope. Yana bukata cewa yana da 10 poini kafin division ko kadan, tare da large bandwidth of amplifier about 15 GHz. A samun stage, layon yana da low-frequency, kuma don in iya samun large band-width, ana gudanar da attenuator.

Amma, wannan yana haifar da dynamic range na instrument. Sampling oscilloscope yana iya amfani da layon da suke faruwa kan layi, amma ba zan iya amfani da transient events. Ba zan iya fito layon mai takam ba tare da limit.

Hanyar Samun Layon

Idan kana bi so ku fada game da har da samun cycle, trigger pulse ya shiga oscillator da kuma linear voltage ya faruwa. Idan amfani na labaran voltages ya faruwa, staircase ya yi rubutu daya, kuma sampling pulse ya faruwa, kuma ya ba sampling gate ta fitar da samun input voltage. Resolution na layon yana da shawar da dimension na steps na staircase generator. Akwai hanyoyi da dama don samun layon, amma biyu ne da ake amfani da su da ma'ana. Babban da muke amfani da shi shine real-time sample, kuma maimakonar da equivalent sample method.

Real Time Sample Method

A hanyar real-time, digitizer yana yi aiki a hanyar mai takam don in iya amfani da manyan poini a harkokin sweep. Tushen da take da shi shine in gani layon mai takam da accuracy. Transient waveform yana da kayan ciki da ba a iya amfani da level na voltage ko current na wani lokaci da ake amfani da nearest ones. Waɗannan abubuwan ba suke faruwa kan layi, saboda haka, ya zan iya amfani da su a cikin wani lokacin da suke faruwa kan layi. Frequency na samples yana da takam da 500 MHz, kuma sample rate yana da takam da 100 samples per second. Don in iya amfani da high-frequency waveform, an bukata cewa high-speed memory ya faruwa.

Equivalent Sample Method

Hanyar equivalent, samun layon yana yi a hanyar prophecy da estimation, wanda yana iya amfani da su da layon mai kyau. A equivalent method, digitizer yana samu samples daga wasu repetitions na signals. Yana iya samu one ko kadan samples daga har da repetition. Idan ake yi haka, accuracy na capturing signal ya zama da takam. Frequency na resultant waveform yana da takam da scope sample rate. Hanyar equivalent sample method, akwai biyu da ake amfani da su: Random method da sequential method.

Random Method of Sampling

Hanyar random method of sampling yana da ma'ana a cikin hanyoyi da ake amfani da su. Ana amfani da internal clock wanda ake girma a haka da cewa yana yi aiki a hanyar input signals, kuma samples yana faruwa continuously, ba kaɗuwa a cikin inda yana faruwa. Samples da aka samu su regular a hanyar lokaci, amma random a hanyar trigger.

Sequential Method of Sampling

A hanyar sequential, samples yana faruwa a hanyar triggered, kuma ba zan iya amfani da time setting. Idan trigger ya faruwa, sample ya faruwa a hanyar small delay. Fara da cewa delay ya zama da takam, amma ya zan da definition. Idan next trigger ya faruwa, ya faruwa a hanyar incremental time delay a hanyar previous one. Delayed sweep yana iya amfani da range da kaɗuwar few microsecond to few seconds. Idan delay for the first time ita ce 't', then the delay for the second time will be little more than 't' and in this manner samples are being taken many times with added delay until the time window is filled.

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