The
2465B, 2455B,
and 2445B
TheTEKTRONIX2465B,2455B,and2445Bportableoscilloscopeshavefourvertical
channelswithDCto400MHz,250MHz,and150MHzbandwidths.Deflectionfactors
runfrom2 mVto5 V perdivision,ina 1-2-5sequence,witheither1 MHor50Cl input
resistance,inchannels1 and2.EitherACorDCinputcouplingisavailableat
1
MfL
Channels3 and4 give0.1V or0.5V perdivision,with1 MHinputresistance,andDC
coupling.
Withthestandard10Xprobes,channels1 and2 display20mVto50
V/divisionandchannels3 and4 display
1
V or5 V/division.
Thetriggersystemworksautomaticallyformostsignals.Theyoperateinvarious
modes,fromanychannel,withoptimumcouplingsfora widerangeofsignals.The
2445BtriggersfromDCto250MHz.The2455Band2465BtriggerfromDCto
500 MHz.
Sweepspeedsrangefrom1.5s to1 nsperdivisiononthe2445Band2455Bandto
500psperdivisiononthe2465B,includingtheeffectsoftheX10magnifierandthe
calibratedvariablebetween1-2-5steps.HorizontaldisplaysincludeA-Sweep,
B-Sweep(delayed),A alternatedwithB,andCH1 (forX/Ydisplays).
TheSETUPfeatures.AUTO,SAVE,andRECALL,savetimeandpreventerrors.
whetheryouarea noviceoperatorora master.AUTOSetupworkswithalmostany
signal.
Forrepeatingmeasurements,theSaveandRecallfunctionsrecordandrestore
asmanyas30instrumentsetups,includingtheextended-functionoptions.Setupscan
berecalledeitherimmediatelyorsequentially.
Digitalreadoutsoftime,voltage,scalefactors,triggerlevels,andauxiliaryinformation
alsosavetimeandreduceerrors.
WithParametricMeasurements,commonmeasurementssuchasfrequency,period,
amplitude,pulsewidth,dutyfactor,risetime,falltime,andpropagationdelaycanbe
madeautomatically.EachmeasurementactivationdisplaystheresultsintheCRT
readout.Measurementresultsremainon-screenuntilanyotherbuttonispressed.
ForinstrumentswithserialnumbersB049999andbelowwithfirmwareVersion
11andaboveorforinstrumentsserialnumbersB050000andabovewithfirmware
Version2 andabovethefollowingfunctionisavailable.TheRECALLbuttonresets
theinstrumentintothemodeofoperationitwasinpriortoperformingtheparametric
measurementorAUTOSetup.
WiththeavailableCounter/Timer/Trigger(CTT),Option06orOption09,
measurementsrequireevenlesseffortandgivebetteraccuracy.TheCTT increases
triggerselectivity,especiallyindigitalsystems.Option09includestheCTTanda 17-bit
WordRecognizer
{WR).
TheavailableTelevisionA/ideo(TV)enhancement,Option05,can
triggeratanydesiredpointina frameanditcanreducetheeffectsofaccouplingand
humina videosignal.TheavailableDigitalMultimeter(DMM)measuresdcvoltage,dc
current,acrmscurrent,resistance,andtemperaturewithfloatinginputs.
2465B/2455B/2445BOperators
