Mai Tsawo Yadda Dual-Trace Oscilloscope? Takaitaccen, Addinin Da Ita Yi Aiki & Hanyoyin Da An Bayyana

Me kadan Dual Trace Oscilloscope?

Takardun

Dual-trace oscilloscope yana amfani da faduwar elektron daya don gina biyu na tsari, kafin tana da shiga daga masu shirya mafi girma. Don gina biyu na tsari, yana amfani da hanyar biyu—alternate mode da chopped mode—wanda ke kontrola a kan switch.

Dalilin Dual-Trace Oscilloscope

A lokacin da ake nuna ko kawo matsala cikin kyakkyawan alama biyu, yana da kyau a kawo wannan matsalar da suka shiga daga masu shirya mafi girma. Idan aka yi haka, zai iya amfani da dual-trace oscilloscope wanda ke gina biyu na tsari ta hanyar faduwar elektron daya, wanda ke jin daidai da neman a baya da kiyaye.

Block Diagram da Addinin Yawanci Dual-Trace Oscilloscope

Block diagram na dual-trace oscilloscope tana cika:

Kamar yadda aka nuna a takarda, oscilloscope tana da channel biyu na ingantaccen shirya mafi girma, A da B. Masu shirya mafi girma su ne suna fara a kan preamplifier da attenuator stage. Masu fitarwa daga biyu na stage su ne suna fara a kan electronic switch, wanda ke bayar da channel daya kawai zuwa vertical amplifier a baya da lokaci. Kyakkyawa tana da trigger selector switch, wanda ke ba aiki a kan triggering via channel A, channel B, ko signal na waje.

Horizontal amplifier tana bayar da signals zuwa electronic switch, wanda source tana da S0 da S2—sweep generator ko channel B. Wannan setup tana ba aiki a kan vertical signals daga channel A da horizontal signals daga channel B za su bar da CRT, wanda ke ba X-Y mode operation don neman X-Y mai kiyaye.

Addinin yawanci na oscilloscope tana za a bayar da front-panel controls, wanda ke ba aiki a kan neman traces daga channel A kawai, channel B kawai, ko biyu na channel a baya da lokaci. Kamar yadda aka bayyana, dual-trace oscilloscopes tana amfani da hanyar biyu na muhimmanci:

Alternate Mode

Idan alternate mode tana fara, electronic switch tana fara a kan biyu na channel, wanda ke fara a kan lokacin da sweep tana fara. Rate na fara tana daidai da rate na sweep, wanda ke ba aiki a kan neman trace daga channel A a kan sweep na farko, sannan channel B a kan sweep na biyu.

Faran a kan channel tana fara a kan lokacin da sweep flyback period, inda electron beam tana ci gaba—wanda ke ba aiki a kan neman traces. Wannan tana ba aiki a kan neman sweep signal daga vertical channel daya, sannan sweep duka daga channel na biyu a kan cycle na biyu.

Waveform output na oscilloscope a alternate mode tana cika a kan takarda:

Wannan mode tana daidai da addinin phase relationship daga signals daga channels A da B. Amma, tana da abu mai karfi: display tana nuna cewa biyu na signals tana faruwa a lokacin da daban-daban, idan ba tare da suka faruwa a lokacin da sama. Kuma, alternate mode ba ya fi aiki don neman low-frequency signals ba.

Chopped Mode

A chopped mode, electronic switch tana fara a kan biyu na channel koyar-koyar a kan sweep daya. Fara tana daidai da koyar-koyar, saboda hakan tana ba aiki a kan neman segments mai kicce daga biyu na signal, wanda ke bayar da illusion ta continuous traces daga biyu na channel.Waveform display a chopped mode tana cika a kan takarda:

A chopped mode, electronic switch tana yi aiki a kan free-running state a frequency mai koyar (karkashin 100 kHz zuwa 500 kHz), independent of the sweep generator’s frequency. Wannan fara mai koyar tana ba aiki a kan neman segments mai kicce daga biyu na channel da suka fara a kan amplifier koyar-koyar.

Idan rate na chopping tana daidai da rate na horizontal sweep, chopped segments tana samu a kan CRT screen, wanda ke kawo original waveforms daga channels A da B. Amma, idan rate na chopping tana daidai da rate na sweep, display tana nuna discontinuities—wanda ke ba alternate mode a fi aiki a kan haka.Dual-trace oscilloscopes tana ba aiki a kan bayar da user za a zabi hanyar addinin yawanci da ya fara a kan front-panel control.